CannondaleSynapse Carbon
Origin
Cannondale launched the Synapse in 2006 as its dedicated endurance road bike — softening the brand's aggressive race DNA into a comfortable, all-day platform built around SAVE micro-suspension. Across four generations it grew tire clearance and compliance, and the current Gen 4 (2022-present) reinvented the category by hard-integrating SmartSense: a frame-powered ecosystem of lights and a rear-facing Garmin Varia radar, positioning safety as the headline feature against rivals like the Trek Domane and Specialized Roubaix.
Specifications
- Frame
- Synapse Carbon (BallisTec), Proportional Response construction; integrated routing, downtube StashPort storage, 12x142 thru-axle, UDH dropout, BSA 68mm threaded BB, flat-mount disc. Hi-Mod ~1000g / standard ~1150g (56cm) / Lab71 ~900g claimed frame.
- Weight
- kg
- Drivetrain
- 2x12 electronic: builds span SRAM Rival AXS / Force AXS and Shimano 105 Di2 / Ultegra Di2 (typ. 46/33 crank, 10-36 cassette)
- Brakes
- Hydraulic flat-mount disc (SRAM Rival/Force AXS or Shimano), 160/160mm rotors
- Wheels
- 700c tubeless-ready; mid builds DT Swiss E1800 Spline (DT 370 hubs), higher builds Reserve 42/49 Turbulent Aero (DT 370) or HollowGram carbon
The verdict
- Brilliant ride quality — smooth and vibration-absorbing yet still fun and lively, the modern endurance benchmark
- Best-in-class tire clearance (up to 48mm front / 42mm rear) makes it a true all-road bike
- Integrated SmartSense lights + rear radar genuinely improve safety in traffic and low light
- Confident, planted handling tuned per frame size (Proportional Response geometry)
- Practical, low-maintenance design: BSA threaded BB, UDH, internal StashPort downtube storage
- SmartSense is hard-integrated — many riders want a clean frame option and resent the forced system
- SmartSense battery charges separately via a proprietary Garmin connector — easy to forget before a ride
- Extra weight from the SmartSense battery, lights and radar (~8.8kg even on a Force AXS build)
- Alloy handlebar on otherwise premium builds feels like a cost-cut niggle
- Lower-tier builds (e.g. Tiagra Carbon 4) offer weak value vs rivals with Ultegra/Rival AXS at similar price
Who it’s for
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