Compare Trek Bikes: ALR vs SL vs SLR Frame Guide [2025 Models]
Those letters after Trek bike model names can be pretty confusing, right? Trek has become a cycling giant since 1976, producing over a million bikes each year. Their naming system can leave even seasoned riders puzzled.
The letter combinations on Trek's road bikes tell you vital information about frame materials and quality. AL means you're looking at aluminum construction. ALR represents Trek's premium aluminum tubing that rivals many carbon bikes in weight and performance. The SL label points to standard carbon fiber frames. SLR marks Trek's top-tier carbon construction that gives you maximum lightness and aerodynamic benefits. The Emonda SLR stands out as one of the lightest production frames ever made, showing Trek's steadfast dedication to climbing performance.
These frames offer more than just different materials. The Domane AL serves as a great entry point starting at £800. The SL and SLR versions come with Trek's innovative IsoSpeed technology that smooths out rough roads. The latest Domane SLR Gen 4 weighs 300g less than older models and offers better aerodynamics with improved comfort. The Madone series focuses on cutting through the air, while the Domane fits tires up to 38mm wide to handle more terrain types.
This piece breaks down Trek's frame naming system and explains the ground application differences between AL, ALR, SL, and SLR in their 2025 lineup. Let us help you find the perfect Trek frame that matches your riding style, whether you love climbing, long rides, or pure speed!
Trek Frame Naming System: AL vs ALR vs SL vs SLR
Trek's frame naming system helps you make smarter bike comparisons. The two-letter codes—AL, ALR, SL, and SLR—tell you about the frame material and quality level. These codes affect how the bike rides and what it costs.
Alpha Aluminum vs OCLV Carbon: Material Differences
Trek bikes with aluminum frames come with either AL or ALR codes. These codes show different quality levels of their Alpha Aluminum technology. The basic AL frames use 100 Series Alpha Aluminum, which gives you great value without sacrificing performance [1]. These frames come with tapered head tubes, internal routing, and work with Trek's DuoTrap S sensor system.
ALR frames are Trek's top-tier aluminum option. They're built with 300 Series Alpha Aluminum and feature Invisible Weld technology [1]. The advanced manufacturing creates smoother welds and lets Trek shape the tubes in more complex ways. ALR frames deliver almost carbon-like performance at a much lower price. Riders who want responsive bikes without spending too much money will love these frames [2].
Trek's carbon frames use their OCLV (Optimum Compaction, Low Void) process. Trek created this carbon manufacturing method over 20 years ago [3]. OCLV technology lets Trek make high-quality carbon frames consistently and control exactly how they ride.
Aluminum and carbon differ in three main ways:
- Weight: OCLV Carbon frames weigh less than aluminum ones
- Compliance: Carbon fiber can flex where needed while staying stiff in other areas
- Manufacturing complexity: Carbon frames need more skilled craftsmanship and cost more [2]
300 Series vs 500/700 Series Carbon Explained
Trek groups its OCLV Carbon into different series numbers based on grade and performance. These numbers determine whether frames get the SL or SLR label.
The 300 Series OCLV gives you "better carbon at an amazing price" with smooth, intermediate-modulus material [3]. You get good performance at a reasonable price, though Trek doesn't use it much in their current road bikes.
The 500 Series OCLV are the foundations of Trek's SL frames. These frames offer "a superb balance of lightweight, strength, and stiffness" and work perfectly with Trek's advanced frame technologies [3]. The Domane SL uses 500 Series OCLV Carbon and includes features like IsoSpeed and internal storage [1].
Trek's premium 700 Series OCLV claims to be "the lightest, strongest carbon in the cycling world" [3]. Trek now also makes 800 Series OCLV for their top-end SLR frames [4]. This exclusive material combines the best modulus and strength. Only Trek has access to this material, which they use in their lightest, highest-performance frames.
How Trek Uses Frame Codes Across Models
These material codes stay consistent across Trek's road bike lineup. This creates a standard hierarchy. You'll see similar patterns when comparing "SL vs SLR" or "AL vs ALR" whether you look at Domane, Emonda, Madone, or Checkpoint models.
The Domane endurance bike shows this system perfectly. The Domane AL uses 100 Series Alpha Aluminum with a comfort-focused carbon fork [3]. The Domane SL steps up to 500 Series OCLV Carbon with IsoSpeed technology for extra comfort [3]. The top-tier Domane SLR frames use lightweight 800 Series OCLV Carbon, which replaced the 700 Series in previous versions [3].
This pattern continues throughout Trek's lineup. The Emonda climbing bike comes in ALR (300 Series Aluminum), SL (500 Series Carbon), and SLR (800 Series Carbon) versions [4]. The aero Madone offers SL and SLR options, each matching their carbon grades [4].
Trek adds numerical suffixes (like Domane SL 6) to show component levels—higher numbers mean better components [2]. This complete system lets you quickly see both frame quality and component level when shopping for Trek bikes.
Trek Domane AL vs SL vs SLR (2025 Models)
Trek Domane's lineup shows how frame materials shape your riding experience. Each frame tier—AL, SL, and SLR—delivers better performance and keeps the Domane's endurance-focused DNA.
Domane AL Gen 4: Endurance Geometry and Mounting Points
Trek's aluminum gateway to endurance road cycling comes in the form of Domane AL Gen 4. The frame uses 100 Series Alpha Aluminum with advanced tube shaping that gives it high-end looks and great ride quality [5]. A full carbon fork adds comfort and cuts down weight.
The Domane AL stands out because you can do so much with it. The frame has multiple mounts for racks, fenders, and top tube bags—perfect for commuting or light touring [5]. You'll find Trek's endurance geometry gives you a stable, comfortable position that doesn't feel too relaxed.
Tire space is a big plus. The Domane AL Gen 4 fits tires up to 38mm wide [6]. This extra room lets you ride smoothly on both tarmac and light gravel. The bikes come with 32mm tubeless-ready tires that hit the sweet spot between comfort and speed [5].
Domane SL Gen 4: IsoSpeed and Internal Storage
The Domane SL brings Trek's 500 Series OCLV Carbon frame with better rear IsoSpeed technology. This decoupler system "soaks up fatiguing bumps in the road" [7]. Reviewers say it's like "being chauffered around in a luxury sedan" [7].
You'll find smart features in the SL frame. There's internal storage in the down tube—a smart spot to keep tools, tubes, and other gear without ruining the bike's clean look [7]. The Gen 4 SL frame weighs about 300g less than before [8], so it climbs better but stays just as comfortable.
The Domane SL keeps things versatile with top tube mounts for bags that don't need bulky straps, plus hidden fender mounts for riding in any weather [7]. The Domane SL 6 uses Shimano 105 Di2 for precise gear changes on any terrain [9].
Domane SLR Gen 4: Adjustable Compliance and 38mm Clearance
Trek's premium 800 Series OCLV Carbon builds the top-tier Domane SLR. This ultralight material makes the frame about 100g lighter than the SL model [10]. The SLR keeps rear IsoSpeed technology but in a lighter, simpler form without adjustability [8].
The Gen 4 Domane SLR no longer has the front IsoSpeed decoupler. New carbon layup and simpler frame design cut weight significantly—complete SLR builds weigh up to 700g less than before [8].
You can still fit 38mm tires, good for everything from fast road rides to mixed-terrain adventures [8]. Trek's integrated RCS Pro stem system keeps cables hidden but lets you change stem size without touching brake hoses [4].
Trek Domane SL vs SLR: Comfort vs Performance Tradeoffs
Carbon grade sets these frames apart—500 Series for SL versus 800 Series for SLR [11]. This means lighter SLR frames that stay just as comfortable.
Parts match this hierarchy. The Domane SLR 7 uses wireless Shimano Ultegra Di2 and Aeolus Pro 37 carbon wheels [12]. SL models usually come with mechanical or electronic 105 parts [9].
Riders say both bikes feel almost the same. One owner noted, "if I was blind folded, I could not tell one from the other if all other parts were the same" [13]. Your choice of components might change your ride as much as frame material.
Your budget and priorities will guide the choice between SL and SLR. The SL gives you most features at a better price, while the SLR cuts maximum weight and adds better components for those wanting Trek's best endurance road bike.
Trek Emonda ALR vs SL vs SLR (2025 Models)
Trek's climbing specialists shine through the Emonda lineup. Every gram counts and performance gets better as you spend more. Each Emonda variant shares similar geometry as a dedicated race platform but delivers unique ride experiences based on frame materials and build techniques.
Emonda ALR Gen 3: Race Geometry in Aluminum
The new Emonda ALR Gen 3 proves you don't need carbon fiber for premium performance. Built with 300 Series Alpha Aluminum, this frame uses Trek's Invisible Weld Technology to blend joints while keeping structural strength [14]. The frame matches its carbon siblings' geometry perfectly, giving you the same proven, race-winning fit at a much lower price [15].
The Emonda ALR's most striking feature shows in its integrated cable routing. Cable housing runs along the handlebar and stem before entering the frame through the top headset bearing [15]. This clean look used to be exclusive to higher-end models. The bike accepts practical standards like a T47 threaded bottom bracket, 27.2mm diameter seatpost, and standard handlebar/stem interface [15].
You can get the Emonda ALR in eight sizes that fit riders from 5'0" to 6'5" with Trek's H1.5 race geometry [15]. This setup strikes a sweet spot between Trek's aggressive H1 position and relaxed H2 variant. The result lets you race hard or enjoy daily rides with equal comfort.
Emonda SL: 500 Series Carbon and Aero Tubing
The Emonda SL brings Trek's 500 Series OCLV Carbon frame with sophisticated aero tube shaping. This material gives you "balanced ride quality, superior handling, and the added benefit of free speed" compared to traditional designs [16]. The SL weighs about 1,142 grams (frame only) with a 380-gram fork—much lighter than the aluminum ALR [1].
The SL keeps the ALR's practical features while adding performance upgrades. You get internal cable routing, DuoTrap S sensor compatibility, and flat-mount disk brakes with 12mm thru-axles [17]. Most SL models come with aero wheels that match the frame's wind-cheating design [18].
Trek's H1.5 geometry puts riders in an optimal aero race position developed with Trek-Segafredo pro cycling teams [2]. This creates what Trek calls "the sweet spot for what our racers want" [2].
Emonda SLR: 800 Series Carbon and H1.5 Fit
The Emonda SLR sits at Trek's climbing platform summit with exclusive 800 Series OCLV Carbon. This advanced material beats Trek's previous premium composite by 30% strength, letting engineers use less material while keeping structural integrity [1]. The result amazes—a sub-700 gram frame (698g in medium) that stays exceptionally stiff with great aero properties [18].
The SLR frame uses the same aero shapes as the SL but cuts drag by 180g compared to older models [19]. This means you save about 60 seconds per hour on flat roads and 18 seconds hourly on 8% gradient climbs [18].
Top SLR models feature Trek's purpose-built Aeolus RSL bar/stem combo that enhances aero performance and drops weight [18]. This system weighs 160g less than Madone's version without losing stiffness or handling precision [19].
Trek Emonda SL vs SLR: Weight and Stiffness Comparison
Weight and price separate Emonda SL and SLR models clearly. A complete 54cm Emonda SL6 weighs 8.5kg while its SLR6 counterpart hits just 7.4kg—an impressive 1.1kg difference [20]. Three main factors create this weight gap:
- The SLR frame weighs 444g less than the SL frame [1]
- SLR models use lighter wheels (Bontrager Race Lite vs Race) [21]
- SLR builds include premium parts like titanium-railed saddles instead of chromoly [21]
Both bikes share identical riding positions, but riders often find the SLR more responsive, especially during climbs and sprints [21]. This comes from the 800 Series carbon's better stiffness-to-weight ratio.
These performance gains cost substantially more. Emonda SL models run $2,699 to $5,999, while SLR versions start at $6,699 and reach past $11,999 for top builds [1]. Serious racers and weight-conscious climbers often find the SLR's advantages worth the investment.
Trek Madone SL vs SLR (2025 Models)
Trek's Madone series is the aero specialist in their road bike lineup. The Gen 8 models show a major change in design philosophy. The 2025 Madone bikes combine light construction with aerodynamic advantages to create versatile race machines for all conditions.
Madone SL Gen 8: IsoFlow and Aero Tubing
The Madone SL Gen 8 gives riders an easier way into Trek's premium aero platform. The bike uses a 500 Series OCLV Carbon frame with innovative Full System Foil tube shaping that helps air flow better around the bike [22]. The design's standout feature is IsoFlow technology—a large hole in the seat cluster area that breaks from traditional frame design [3].
This unique structure does several things at once. It makes the bike more aerodynamic and saves about 150g compared to older designs. The carefully planned carbon layup also makes the ride more comfortable [3]. SL models come with a two-piece cockpit that pairs a Trek RCS Pro forged aluminum stem with a carbon fiber aero handlebar [3].
A complete Madone SL 7 weighs around 7.9kg [23]. These bikes come with Shimano Ultegra Di2 electronic shifting and Bontrager Aeolus Pro 51 carbon wheels [3]. The SL models can fit 32mm tires, which makes them more versatile [23].
Madone SLR Gen 8: 7kg Build and Project One Options
Trek's flagship Madone SLR Gen 8 raises performance with premium 900 Series OCLV Carbon [24]. This ultralight material brings the frame weight down to just 796 grams (M/L size), and the matching fork adds only 350g [25]. Complete SLR builds weigh close to 7.3kg [23], with some custom builds as light as 7.77kg [26].
SLR models come with Trek RSL Aero Bottles and Cages that blend naturally with the frame's Full System Foil shaping [27]. Each bottle holds 595ml while keeping the bike aerodynamic [28]. The bike also features a one-piece carbon bar/stem combo that cuts weight and improves aerodynamics [3].
These bikes give you access to Trek's Project One customization program, with special paint schemes like the Interstellar option [25].
SL vs SLR: Carbon Grade and Component Differences
The main difference between Madone SL and SLR models comes from their carbon construction—500 Series for SL versus 900 Series for SLR [27][24]. This change in material saves about 600g across the frameset [25].
Both bikes share almost the same tube shaping and innovative IsoFlow technology when it comes to aerodynamics. The SLR's one-piece cockpit gives it a slight edge, which Trek says saves about six seconds per hour compared to the SL's two-piece system [3].
Price is another big factor. The Madone SL 7 costs $6,500 while the SLR 7 runs $9,000—you pay $2,500 more mainly for lighter carbon construction and integrated components [25].
Both bikes deliver top-level aero performance. The SLR offers the ultimate in weight savings and exclusive features for riders who want the best of Trek's technology. Many cyclists find the SL gives them similar aerodynamic benefits at a much lower price [3].
Trek Checkpoint ALR vs SL vs SLR
Trek's Checkpoint series takes the brand's signature frame technologies and turns them into purpose-built gravel machines. Each tier brings better capabilities for adventure riding.
Checkpoint ALR: Adventure Geometry and Mounting Points
Trek's gravel lineup starts with the Checkpoint ALR, built with a sturdy 300 Series Alpha Aluminum frame. This foundation strikes a sweet spot between durability and weight. The ALR shares the same progressive geometry as its carbon siblings, with a slightly longer reach that brings stability at high speeds and keeps you efficient on climbs [29].
The ALR stands out with its practical take on adventure riding. You'll find hidden cable routing that stays away from frame bags and protected from the elements [30]. The frame has rack mounts, fender mounts, and built-in frame bag mounts that let you carry everything you need for long trips [11]. A carbon fork adds comfort without extra weight.
Checkpoint SL: 500 Series Carbon and IsoSpeed
The Checkpoint SL brings Trek's 500 Series OCLV Carbon construction paired with their comfort-boosting IsoSpeed technology. This decoupler splits the seat tube and adds enough vertical flex to smooth out rough terrain [31]. The SL also comes with a clever internal downtube storage compartment for tools and spares [32].
SL Gen 2 models work with tires up to 45mm wide, while the latest SL Gen 3 models can fit 50mm tires [11]. Beyond the added comfort, SL models let you mount rear racks, up to four bottles on the frame, and various bags [11]. These bikes usually come with GRX components and weigh about 9.7kg [33].
Checkpoint SLR: Race-Ready Gravel Geometry
The Checkpoint SLR sits at the top of the line with Trek's premium 700 Series OCLV Carbon, creating what Trek calls "a true gravel-grinding powerhouse" [5]. This light frame (claimed 1,638g) helps build complete bikes weighing just 7.55kg [31].
The SLR's race-focused character shines through its design for events like the 200-mile Unbound gravel race [31]. You get the same IsoSpeed technology and downtube storage as SL models, plus a refined Ride Tuned seat mast [29]. The 45mm tire clearance balances capability with aerodynamic efficiency [31].
Trek Checkpoint SL vs SLR: Endurance vs Speed
SL and SLR models differ mainly in their purpose. The SL combines race and adventure capabilities with its 500 Series carbon, while the SLR focuses on racing performance through lighter 700 Series construction [34].
Component choices reflect this approach—SLR models usually come with higher-end groupsets and carbon wheels [6]. Price points tell the story: SL models start at $3,199 while SLR variants begin at $7,599 [34], showing the value of these material and component upgrades.
Your choice between them should depend on whether you want endurance comfort or competitive speed for your gravel adventures.
Which Trek Frame is Right for You?
Matching your riding style with the right bike technology is key to picking the perfect Trek frame. Let's get into which frames work best for specific riding types in Trek's 2025 lineup.
Best for Endurance: Domane SL vs SLR
The Domane series stands out for all-day comfort with its "all-road" design that handles everything from smooth pavement to light gravel [35]. The SL frame gives you great value and performance with 500 Series OCLV Carbon. The SLR uses premium 800 Series carbon that cuts weight by 300g [36]. Both frames can fit 38mm tires [37], and the main difference comes down to weight rather than comfort features. Most endurance riders will find that the Domane SL gives them 90% of the SLR's performance at a much lower price.
Best for Climbing: Emonda ALR vs SLR
The Emonda excels on steep climbs with its "lightweight design with subtle aero advantages" [35]. Budget-conscious climbers will love the aluminum ALR version with its impressive 1,112g frame weight [7]. The SLR model uses ultralight 800 Series carbon that makes it about 1.1kg lighter than similar SL models [9]. Serious racers will benefit from the SLR's premium build, but recreational climbers will find the ALR does the job well at a much lower cost.
Best for Aero: Madone SL vs SLR
The Madone, Trek's race-focused machine, features "Full System Foil aero shapes from front to back for free speed" [35]. The SL version uses 500 Series carbon and matches the SLR's aerodynamic performance almost exactly [38]. The premium SLR earns its higher price through weight savings - complete SLR builds weigh around 7.3kg [39], while similar SL models come in at 7.9kg [40]. Both bikes cut through the wind equally well, making the SL a smarter choice unless you need every possible weight advantage.
Best for Gravel: Checkpoint ALR vs SL
Gravel riders will love the Checkpoint's "50mm gravel tire clearance" and "plenty of mounts for gear and hydration storage" [35]. The aluminum ALR is built tough and comes with practical features like hidden cable routing and frame bag mounts [41]. The SL adds IsoSpeed technology and internal downtube storage [42] to make those long gravel rides more comfortable. The ALR works great for casual gravel rides, but if you're planning bikepacking adventures or longer events, the SL's extra comfort features might be worth the investment.
Conclusion
Conclusion: Making Your Trek Frame Decision
This piece has broken down Trek's complex frame naming system to help you pick your next bike. The differences between AL, ALR, SL, and SLR go way beyond marketing tricks. These codes tell you exactly what you're getting in terms of materials, manufacturing, and performance.
AL and ALR Alpha Aluminum frames give you great value and an impressive ride. ALR models with their Invisible Weld Technology come close to carbon performance without the carbon price tag. OCLV Carbon frames (SL and SLR) get lighter and better as you climb up from 500 Series to 800/900 Series carbon.
Each Trek line shines in its own way. The Domane's comfort-focused design and wide tire clearance make it perfect for long rides. The Emonda's ultralight build helps you conquer those climbs. The Madone helps competitive riders squeeze out every bit of speed with its aerodynamic design. The Checkpoint takes on rough terrain with tough construction and plenty of mounting points.
Your perfect Trek frame comes down to your riding style, performance needs, and budget. Most riders will find AL and SL frames more than capable for their adventures. These frames offer excellent value for money. Competitive cyclists chasing those extra seconds might want to look at ALR and SLR options.
The bike you pick will benefit from Trek's decades of engineering and countless pro racing wins that have made these designs better. Trek's straightforward naming system lets you understand their entire lineup once you know the frame tiers. This makes it easier to find that perfect match for your riding needs.
FAQs
Q1. What are the key differences between Trek SL and SLR frames? SL frames use 500 Series OCLV Carbon, while SLR frames feature premium 800 or 900 Series carbon. This results in SLR frames being significantly lighter and stiffer, with enhanced performance characteristics. However, SL frames offer similar features at a lower price point, making them suitable for most riders.
Q2. What do the frame designations AL, ALR, SL, and SLR mean in Trek's lineup? AL denotes standard aluminum frames, ALR represents Trek's premium aluminum, SL indicates standard carbon fiber frames, and SLR signifies Trek's highest-quality carbon construction. This hierarchy reflects increasing levels of performance and typically correlates with higher prices.
Q3. How do Trek Checkpoint ALR and SL models differ for gravel riding? The Checkpoint ALR uses 300 Series Alpha Aluminum, while the SL features 500 Series OCLV Carbon. The SL adds comfort-enhancing IsoSpeed technology and internal downtube storage. Both offer similar tire clearance and mounting options, but the SL provides a smoother ride at a higher price point.
Q4. Which Trek frame is best for endurance riding? The Domane series, particularly the SL and SLR models, excel at endurance riding. They feature comfort-focused designs with IsoSpeed technology and generous tire clearance. The SL offers great value, while the SLR provides maximum performance with its lighter 800 Series carbon frame.
Q5. How does Trek's Madone series cater to riders seeking aerodynamic advantages? The Madone SL and SLR models incorporate Full System Foil aero shaping and IsoFlow technology for optimal aerodynamics. While both deliver similar wind-cheating performance, the SLR uses higher-grade carbon for significant weight savings, making it ideal for competitive riders prioritizing every marginal gain.
References
[1] - https://www.bicycling.com/bikes-gear/a32894303/trek-emonda-review/
[2] - https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road-bikes/%C3%A9monda/%C3%A9monda-sl/%C3%A9monda-sl-disk-frameset/p/32688/
[3] - https://escapecollective.com/2024-trek-madone-sl-gen7-review/
[4] - https://trainabsolute.com/news/trek-domane-sl-and-slr-gen-4-release/
[5] - https://www.trekbikes.com/us/en_US/bikes/bikepacking-touring-bikes/checkpoint/checkpoint-slr/checkpoint-slr-7/p/35294/
[6] - https://www.trekbikes.com/us/en_US/bikes/bikepacking-touring-bikes/checkpoint/checkpoint-slr/checkpoint-slr-9-axs/p/35296/
[7] - https://velo.outsideonline.com/road/road-gear/2019-trek-emonda-alr-review/
[8] - https://www.rouleur.cc/en-us/blogs/desire-journal/trek-unveil-domane-sl-slr-and-rsl-all-you-need-to-know?srsltid=AfmBOoqykL4wIF_lXlDEF56CfZiKwmEbrT1aY6lwtB0BNv3geFA7bOEM
[9] - https://99spokes.com/compare?bikes=trek-emonda-alr-5-2021,trek-emonda-slr-7-2021
[10] - https://velo.outsideonline.com/road/road-racing/2023-trek-domane-sl-slr-and-rsl-options-explained/
[11] - https://www.trekbikes.com/us/en_US/checkpoint/
[12] - https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road-bikes/domane/domane-slr/domane-slr-7-gen-4/p/37059/
[13] - https://www.bikeforums.net/road-cycling/1294400-trek-2024-sl-vs-slr-frames.html
[14] - https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road-bikes/%C3%A9monda/%C3%A9monda-alr/%C3%A9monda-alr-disk-frameset/p/48297/
[15] - https://www.bicycling.com/bikes-gear/a45023594/treks-latest-emonda-alr/
[16] - https://www.trekbikes.com/us/en_US/emonda/
[17] - https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road-bikes/%C3%A9monda/%C3%A9monda-sl/%C3%A9monda-sl-5-disk/p/32560/
[18] - https://www.wheelandsprocket.com/articles/the-all-new-trek-emonda-pg583.htm?srsltid=AfmBOoqtqmNdIhIRc3Y0bhj7BqaYuKpkPI0DJ9hJhhsX75uhbgBfMFnD
[19] - https://www.cyclist.co.uk/reviews/trek-emonda-slr-and-sl-2021-all-you-need-to-know
[20] - https://99spokes.com/compare?bikes=trek-emonda-alr-5-2025%2Ctrek-emonda-sl-6-2024%2Ctrek-emonda-slr-6-2024
[21] - https://velo.outsideonline.com/tech/trek-emonda-comparison-review-sl6-versus-slr6/
[22] - https://www.bryansbikes.com/product/trek-madone-sl-5-gen-8-770598-1.htm
[23] - https://99spokes.com/compare?bikes=trek-madone-sl-7-gen-7-2024,trek-madone-sl-7-gen-8-2025,trek-madone-slr-7-gen-8-2025
[24] - https://bikerumor.com/trek-madone-gen-8/
[25] - https://escapecollective.com/goodbye-emonda-trek-goes-all-in-with-the-new-madone-gen-8/
[26] - https://weightweenies.starbike.com/forum/viewtopic.php?t=175564&start=390
[27] - https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road-bikes/madone/madone-slr/madone-slr-7-gen-8/p/46687/
[28] - https://www.trekbikes.com/ca/en_CA/FAQ/madone-gen8/
[29] - https://99spokes.com/compare?bikes=trek-checkpoint-alr-5-2024,trek-checkpoint-sl-5-gen-2-2024,trek-checkpoint-slr-7-2024
[30] - https://www.trekbikes.com/us/en_US/bikes/bikepacking-touring-bikes/checkpoint/checkpoint-alr/checkpoint-alr-frameset/p/35668/
[31] - https://flowmountainbike.com/post-all/first-look-trek-checkmate-slr-and-checkpoint-sl-gen-3/
[32] - https://www.trekbikes.com/us/en_US/bikes/bikepacking-touring-bikes/checkpoint/checkpoint-sl/checkpoint-sl-5-axs-gen-3/p/47071/
[33] - https://www.trekbikes.com/us/en_US/bikes/bikepacking-touring-bikes/checkpoint/checkpoint-sl/checkpoint-sl-5-gen-2/p/35169/
[34] - https://bikerumor.com/trek-aims-for-a-gravel-world-championship-with-race-focused-checkpoint-slr-plus-sl-and-alr-models/
[35] - https://www.trekbikes.com/us/en_US/road_buyers_guide/
[36] - https://velo.outsideonline.com/road/road-racing/trek-releases-4th-generation-domane-sl-and-slr/
[37] - https://www.trekbikes.com/ie/en_IE/FAQ/domane-sl-slr-rsl-23/
[38] - https://99spokes.com/compare?bikes=trek-madone-sl-7-gen-8-2025,trek-madone-slr-7-gen-8-2025
[39] - https://www.cyclingnews.com/reviews/trek-madone-gen-8-first-ride-review/
[40] - https://bikerumor.com/trek-madone-sl-gen-7-road-race-bike-rsl-aero-bar/
[41] - https://www.summitbicycles.com/articles/trek-gravel-bikes-pg444.htm?srsltid=AfmBOoqNJ3DglLLtamMklWvUGUlRMAZjfR1cwBDyHu3q6O0rwK1UdvQ9
[42] - https://www.bikeexchange.com/en-US/brands/trek/trek-checkpoint
