Cannondale SystemSix vs SuperSix: Which Speed Machine Wins? [2025 Guide]

Two bikes. Both screamingly fast. One impossible choice.

"Wait, do I really need to choose between the fastest bike in the world and the most versatile speed demon?" 🤔

— Every Cannondale-obsessed cyclist, ever.

Here's your dilemma: The SystemSix rocks up with wind tunnel data claiming the ultimate speed crown, while the SuperSix EVO just dropped a jaw-dropping 30% aerodynamic improvement over its predecessor. Talk about making life complicated for speed junkies!

The SystemSix? Pure aero aggression. Deep, chunky tube sections built for demolishing flat roads and rolling hills. The SuperSix EVO? More like the Swiss Army knife of speed machines — lighter, nimbler, but still plenty fast enough to make your riding buddies sweat.

Here's where it gets interesting: The current SuperSix EVO saves riders 12 watts at 45kph compared to the old version. That's serious business. Both bikes clear 30mm tires no problem, but ride them back-to-back and you'll swear they're from different planets.

Weight tells its own story. The SuperSix EVO's premium Lab71 frame? A featherweight 770g. Hi-Mod tips the scales at 810g, standard at 915g. Meanwhile, the SystemSix carries extra pounds courtesy of those wind-slicing tube shapes. But here's the thing — those deep aero sections aren't just for show. They deliver legit speed gains that might just make the weight penalty worth it.

Ready to pick your poison? Let's dig into what makes these Cannondale rockets tick and figure out which one belongs in your garage!

Frame Design and Aerodynamics

Put these bikes side by side and the differences jump out immediately. We're talking two completely different philosophies on how to cheat the wind.

Tube Profiles: Deep Aero vs Refined Aero Shapes

The SystemSix doesn't mess around — it's all about those chunky, truncated airfoil shapes everywhere you look. Cannondale spent "hours in the wind tunnel and countless iterations of computational fluid dynamic modeling" [1] to nail these profiles. That down tube? Pure NACA leading edge goodness while still playing nice with UCI regulations [1]. Aggressive doesn't begin to cover it.

The SuperSix EVO plays a smarter game. Sure, it's the fourth-generation frame with sleeker, more elegant tubing, but here's the clever bit — it still delivers serious aerodynamic gains without going full chunky-tube mode. The seat tube and seatpost follow that "narrow is faster" thinking, topped off with aero profiling and a truncated rear section to slice through the air [1].

Cable Routing: Internal Delta Steerer vs HollowGram Knot

SuperSix EVO's party trick? Delta Steerer technology. Picture a triangular-shaped steerer tube that creates space for internal cable routing without needing massive headset bearings [1]. The result? "Seamless integration of the bike's cables from the cockpit down into the frameset, while shrinking the headtube's frontal area for reduced drag" [1]. Pretty neat engineering.

SystemSix goes different. The HollowGram Knot system routes everything through the bar into a two-piece stem cover, then through the head tube ahead of the headset bearings [2]. That Knot SystemBar delivers "all of the aerodynamic benefits of a one-piece road bar, plus the length, width & angle adjustability of a traditional separate bar and stem setup" [5]. Best of both worlds, basically.

Tire Clearance: 30mm on Both, but Different Use Cases

Both bikes handle 30mm tires with 6mm clearance all around [3], but here's where things get interesting. The SuperSix EVO treats that clearance like an invitation — "run wider tires for more comfort and control, or slim down for lightweight responsiveness" [1]. Total terrain flexibility.

The SystemSix? Different story. It typically rocks narrower 25mm rubber [6] because pure speed is the mission. Those wider rims (32mm external) work some magic too — they can bump 23c tires up to 26mm or transform 25c tires into 28mm [5]. All about maximizing that aero advantage on smooth roads.

Weight and Climbing Efficiency

Time for some brutal honesty about what those extra grams really mean when the road tilts skyward.

Frame Weights: The Numbers Don't Lie

Cannondale splits the SuperSix EVO into three carbon options, each telling a different weight story. The premium Lab71 frame hits an eye-watering 770g (size 56cm, painted and build-ready) [7] — seriously, that's lighter than most people's water bottles. Step down to Hi-Mod and you're looking at 810g [6], while the standard carbon frame settles at 915g [6].

The SystemSix? Those chunky aero tubes demand their tribute. Frame weight typically pushes past 1,000g, reflecting all that extra carbon needed to slice through air.

Complete Builds: Half a Kilo Makes a Difference

Put these frames together as complete bikes and the gap widens. Testing shows the SuperSix EVO Hi-Mod 1 at 7.2kg [6] versus the SystemSix's 7.7kg [6]. Get fancy with a top-spec Lab71 build and you're flirting with the UCI weight limit of 6.8kg [8] — that's a solid half-kilogram advantage over comparable SystemSix setups.

Where Weight Actually Matters: The Climbing Reality Check

Here's where math meets mountains. The SuperSix's weight advantage delivers approximately a 1.5% advantage over aero bikes on 5km climbs with 6.3% gradients [9]. Breaking it down further: every 2.2kg of extra weight costs you around 8 watts when climbing [9], while aerodynamics only saves about 4.8W against air resistance at those speeds.

🚨 Plot twist: The crossover point sits around 6-7% gradients [9]. Steeper than that? The SuperSix rules. Gentler rolling terrain? The SystemSix starts clawing back its advantage despite the weight penalty.

This explains why pros grab the SuperSix for mountain stages but reach for the SystemSix when the course flattens out [10]. It's not just preference — it's physics.

Ride Feel and Geometry Differences

Numbers on paper are one thing. How these bikes actually feel under you? That's where the magic happens.

Stack and Reach: Stretched Out vs Dialed In

The SystemSix stretches you out further — we're talking up to 9mm more reach than the SuperSix EVO across the size range. But here's the kicker: both bikes keep similar stack heights, so your front-end position stays roughly the same.

What's this mean for you? The SystemSix wants you locked into that wind-cheating, TT-style position. The SuperSix EVO? It's a bit more forgiving if you're not quite ready to go full aero warrior.

Smart move by Cannondale on the current SuperSix EVO — they bumped up the stack slightly and shortened the reach compared to older generations. Translation: more riders can actually fit on the thing without needing the flexibility of a yoga instructor.

Handling: Lightning vs Thunder

Here's where these bikes show their true colors.

The SuperSix EVO? Pure lightning. "Unreal handling" and "explosive acceleration" — that's what riders rave about. Point it into a corner and it responds like it's reading your mind. Technical descents? Game on.

The SystemSix takes a different approach. Think thunder instead of lightning. One rider summed it up perfectly: "The SystemSix is a TANK." Not talking comfort here — talking about that rock-solid stability when you're bombing descents at 70kph or fighting crosswinds on exposed roads.

Both bikes carry Cannondale's race DNA, but the SystemSix trades some of that knife-edge agility for planted confidence at speed. Your call on what matters more.

Comfort: SAVE Technology vs Aero Stiffness

This is where the rubber meets the road — literally.

The SuperSix EVO packs Cannondale's SAVE tech (Synapse Active Vibration Elimination, if you're keeping track). Think of it as micro-suspension built right into the carbon layup. Strategic flex zones in the frame and fork soak up road chatter before it reaches you.

The SystemSix? Different story. Those deep aero tubes prioritize stiffness over compliance. As one rider put it, the SystemSix "feels stiffer but it's not uncomfortable by any means." Fair enough if you're chasing watts and don't mind trading some buzz for speed.

But if you're logging serious miles on rough roads, the SuperSix EVO's SAVE seatpost gives you 4mm of deflection to absorb the worst hits. That's the difference between finishing your century ride fresh versus feeling like you've been in a paint shaker.

Speed freaks might accept the trade-off. Everyone else? The SuperSix EVO's got your back (and your sit bones).

Build Options and Pricing

Money talks, and these Cannondale speed demons have plenty to say about your wallet!

Frame Grades: The Carbon Hierarchy Explained

The SuperSix EVO comes in three flavors of carbon goodness. At the top? The mind-blowing Lab71 version with its 770g frame weight [11] — seriously, this thing is lighter than some water bottles! The Hi-MOD variant sits just 40g heavier at 810g [11], using Cannondale's signature high-modulus magic. Even the "standard" carbon frame hits a respectable 915g [11].

The SystemSix keeps things simpler — Hi-MOD and standard carbon only. No Lab71 option here, which makes sense given those chunky aero tubes need extra material.

Groupset Madness: From Budget-Friendly to Bank-Breaking

Both bikes offer groupset options that'll make your head spin. The SystemSix Hi-MOD typically rolls with electronic goodies like Shimano Ultegra Di2 12-speed [12]. Want mechanical shifting? You'll need to look at the standard carbon models.

The SuperSix EVO? Way more choices. Start with mechanical Shimano 105, work your way up through electronic Di2 options, all the way to full Dura-Ace [6]. SRAM fans get Red AXS builds on both bikes, though the SuperSix also throws in Force options [6]. Fun fact: power meters mostly show up on Lab71 models with SRAM Red builds [6].

The Damage: £3,000 to £12,500

Brace yourself for the pricing reality check!

The SuperSix EVO starts at a more reasonable £3,000 for the entry-level EVO 4 spec [6] — not exactly pocket change, but accessible for serious riders. The SystemSix? Premium positioning means you're looking at around £5,000 minimum [6].

Want to go full wallet-destruction mode? Both bikes can easily crack £10,000. The top SystemSix Hi-MOD Dura-Ace Di2 used to hit $10,999 [13], while premium SuperSix builds can push £12,500.

SmartSense: The Tech Add-On

Originally designed for the Synapse, SmartSense is now available on both speed machines [6]. Front and rear lights plus Garmin rearview radar, all running off one battery [6]. Sounds cool, right? Just know it adds about 500g to your ride [6] — a performance tradeoff worth considering if every gram matters to you.

Not included in your build? No worries — Cannondale offers SmartSense as a retrofit for compatible frames [14].

Quick Reference: SystemSix vs SuperSix EVO

Need the facts fast? Here's your side-by-side breakdown of what makes each bike tick:

Still torn between them? The table doesn't lie — but your riding style will make the final call.

Conclusion

Final Verdict: Which Cannondale is Right for You?

Time for the moment of truth. You've got two absolute rockets, each with its own superpower.

The SystemSix? Your flat-land destroyer. Wind tunnel tested, aero optimized, built to make every watt count when the road stretches endlessly ahead. Perfect if you're chasing KOMs on rolling terrain or need that rock-solid stability when things get seriously fast.

The SuperSix EVO? Your mountain-goat speedster. Featherweight Lab71 carbon meets clever engineering that doesn't compromise. Climbs like a dream, handles like it's on rails, and won't beat you up on rough roads thanks to that SAVE tech.

Here's the thing — there's no wrong choice here. Both bikes are stupidly good at what they do.

Go SystemSix if:

• Flat and rolling roads are your playground 🏎️
• You're chasing pure speed over everything else
• Rock-solid stability at 50kph+ sounds appealing
• You don't mind carrying a few extra grams for aero gains

Go SuperSix EVO if:

• Mountains make your heart sing 🏔️
• You want one bike that does everything brilliantly
• Comfort matters for those century rides
• Your wallet prefers the £3,000 starting point

Money matters too. The SuperSix's lower entry price makes it more accessible, but both bikes can venture into serious cash territory if you want all the fancy bits.

Bottom line? Your riding style picks the winner. Love climbing? SuperSix EVO all day. Live for speed on flatter terrain? SystemSix is calling your name.

Either way, you're getting a bike that'll make your riding buddies seriously jealous. So pick one, clip in, and get ready to fly! 🚀

FAQs

Q1. What are the key differences between the Cannondale SystemSix and SuperSix EVO? The SystemSix is designed for pure aerodynamic performance with deep tube shapes, while the SuperSix EVO balances aerodynamics with lightweight climbing efficiency. The SystemSix excels on flat and rolling terrain, while the SuperSix EVO is more versatile and performs well in mountainous areas.

Q2. Which Cannondale model is considered the fastest? The Cannondale SystemSix is often referred to as the "fastest bike in the world" based on wind tunnel data. However, the SuperSix EVO has also made significant aerodynamic improvements, saving riders 12 watts at 45kph compared to its previous generation.

Q3. How do the weights of the SystemSix and SuperSix EVO compare? The SuperSix EVO is significantly lighter, with the premium Lab71 version weighing just 770g for the frame. In contrast, the SystemSix frame typically exceeds 1,000g due to its deeper aero tube profiles. Complete bike builds show the SuperSix EVO Hi-Mod 1 at 7.2kg compared to the SystemSix at 7.7kg.

Q4. Are both bikes comfortable for long rides? The SuperSix EVO incorporates Cannondale's SAVE micro-suspension technology, making it more comfortable for long rides. The SystemSix, while stiffer due to its aerodynamic focus, is still described as not uncomfortable. Rider preference and intended use will determine which is more suitable for extended time in the saddle.

Q5. What is the price range for these Cannondale models? The SuperSix EVO has a more accessible entry point, starting at around £3,000 for base models. The SystemSix maintains a premium position, with prices beginning around £5,000. Both bikes offer high-end builds that can exceed £10,000, with some premium SuperSix configurations approaching £12,500.

References

[1] - https://www.cannondale.com/en-us/bikes/road/race/supersix-evo/supersix-evo-3
[2] - https://velo.outsideonline.com/road/road-racing/first-ride-cannondale-systemsix/
[3] - https://escapecollective.com/review-cannondales-supersix-evo-hi-mod-ii-balances-reputation-with-modern-performance/
[4] - https://www.cannondale.com/en-us/technology/delta-steerer
[5] - https://bikerumor.com/first-ride-review-2019-cannondale-systemsix-disk-brakes-aero-fastest-road-bike-in-the-world/
[6] - https://www.cyclist.co.uk/buying-guides/cannondale-supersix-systemsix-synapse
[7] - https://www.cannondale.com/en-us/bikes/road/race/supersix-evo
[8] - https://www.rouleur.cc/en-us/blogs/the-rouleur-journal/new-cannondale-supersix-evo-first-ride-impressions-a-lightweight-bike-as-fast-as-an-aero-model?srsltid=AfmBOorTmQWMbV8Iu7nkUJAYv8yMYs9gxoUwPBSF5BeL3RgNYY9GpXZY
[9] - https://www.cyclist.co.uk/in-depth/uphill-battle-aero-vs-lightweight-field-test
[10] - https://weightweenies.starbike.com/forum/viewtopic.php?t=163335
[11] - https://www.strictlybicycles.com/products/cannondale-supersix-evo-lab71-frameset?srsltid=AfmBOorrJfYjI9fV_QnFhvCEzBYDvW-SA8cEDuDiAmaJakTKUL5Aj52Q
[12] - https://www.cannondale.com/en/bikes/road/race/systemsix/systemsix-hi-mod-ultegra-di2
[13] - https://www.bicycling.com/bikes-gear/a22013996/cannondale-systemsix-aero-bike-first-look/
[14] - https://bikerumor.com/cannondale-smartsense-gives-all-new-2022-synapse-integrated-lights-radar-on-single-battery/