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  • Synapse carbon frame features optimized tube shaping to promote efficiency and comfort; frame geometry gives a more upright position than more race-oriented road frames
  • Rear part of the frame and the all-carbon fork feature Cannondale Synapse Active Vibration Elimination (S.A.V.E.) technology for damping road vibration
  • Cannondale HollowGram Si compact crankset is paired with a 11-32 tooth cassette for 22 capable gears
  • BB30 bottom bracket enhances stiffness for more efficient power transfer
  • Shimano RS685 shifters and lightweight, dependable Shimano Ultegra derailleurs provide silky-smooth shifts through the gears
  • Powerful Shimano RS685 hydraulic disc brakes provide smooth, controlled deceleration even on slick, wet roads
  • Lightweight CZero Carbon Disc rims are wrapped with Schwalbe One folding tires for fast-rolling performance
  • Specs are subject to change


All bicycles sold at REI include a free warranty tune-up. New bikes go through a normal break-in period, after which readjustment is important for longevity and performance. Bring your new bike in to your local REI for its free tune-up within 20 hours of use or 6 months from purchase, whichever comes first. Contact your nearest REI bike shop to schedule this important service.

Free shipping & Assembly with REI Store Pickup

Cannondale bikes purchased on must be shipped to and picked up at REI stores which are authorized Cannondale dealers. The bikes are fully assembled and the shipping is free!

See the current list of REI stores which are authorized Cannondale dealers.

View all Cannondale Endurance Bikes

REI membership


Best Use Road Cycling
Frame BallisTec carbon
Fork BallisTec carbon
Bike Suspension No Suspension
Crankset Cannondale HollowGram Si, 50/34
Bottom Bracket FSA BB30
Shifters Shimano R685
Front Derailleur Shimano Ultegra
Rear Derailleur Shimano Ultegra
Rear Cogs Shimano Ultegra, 11-32, 11-speed
Number of Gears 22 gear(s)
Brake Type Hydraulic Disc Brake
Brakes Shimano R685 hydraulic disc
Brake Levers Shimano R685
Rims CZero Carbon Disc, 20mm clincher
Front Hub CZero Centerlock, 28h
Rear Hub CZero Centerlock, 28h
Wheel Size 700c
Tires Schwalbe One, 700 x 28, folding
Tire Width 28 millimeters
Handlebar Shape Drop Bar
Handlebar Cannondale C1 Ultralight, 7050 alloy
Stem Cannondale C1
Seat Post FSA SL-K Carbon
Saddle Fabric Spoon Shallow Race, Ti rail
Pedals Sold separately
Headset CAADX Si
Chain Shimano HG700
Weight 17 lbs. 1.6 oz.
Bike Weight Bike weight is based on median size, as sold, or the average of two median sizes.
Gender Unisex
Graphic of a bike and its measurements

How we measure bikes

Understanding bike geometry helps you get a perfect fit.

1. Reach

2. Stack

3. Effective Top Tube

4. Seat Tube Center to Top

5. Standover Height

6. Head Tube Length

7. Head Tube Angle

8. Seat Tube Angle

9. Bottom Bracket Height

10. Wheelbase

11. Chainstay Length

12. Fork Offset

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Is the wheelset tubeless?

Asked by: Jallenm
The Cannondale CZero wheelset on the Synapse HM Disc Ultegra Bike is tubeless compatible.
Answered by: REIservice
Date published: 2017-01-19
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