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Thanks to a full carbon frameset with Endurance Race geometry, the 2021 Cannondale Synapse Carbon 105 bike goes the extra miles with the stiffness, lightness and response for the long road ahead.

  • Features

    • Asymmetrical BallisTec carbon frameset with refined tube shapes delivers the light weight and stiffness you need for steep climbs and fast sprints
    • Endurance Race geometry positions you forward enough to go hard but upright enough to go long
    • SAVE micro-suspension technology in the frame and fork helps damp road vibrations and bumps in the road
    • 2 x 11-speed Shimano 105 components with a Cannondale 1 crank offer race-ready performance with reliable, efficient engagement and power transfer
    • Shimano 105 hydraulic disc brakes provice confident stopping power and control in all conditions
    • Asymmetrically split seat tube provides maximum stiffness with minimal weight
    • Removable seatstay bridge and hidden fender mounts keep you riding through any weather conditions (fenders not included)
    • Allows full clearance for tires up to 32 mm wide to get the most out of your endurance rides
    • Pedals not included; specs and images are subject to change

    Imported.

    Free Adjustment Period:
    New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
    View all Cannondale Endurance Bikes
  • Technical Specs

    Best Use

    Road Cycling

    Bike Frame Material

    Carbon

    Frame

    BallisTec Carbon, Di2 ready, flat mount disc, internal cable routing

    Fork

    BallisTec Full Carbon, integrated crown race, size-specific design,

    Bike Suspension

    No Suspension

    Crankset

    Cannondale 1, BB30A, 50/34T

    Bottom Bracket

    Cannondale BB30

    Shifters

    Shimano 105, 2 x 11-speed

    Front Derailleur

    Shimano 105, braze-on

    Rear Derailleur

    Shimano 105 GS

    Rear Cogs

    Shimano 105, 11-34T, 11-speed

    Number of Gears

    22 gear(s)

    Brake Type

    Hydraulic Disc Brake

    Brakes

    Shimano 105 hydraulic disc, 160/160 mm RT64 rotors

    Brake Levers

    Shimano 105 hydraulic disc

    Rims

    Cannondale RD 2.0 Disc, double wall with eyelets, 28h

    Front Hub

    Formula CL-712, 12 x 100 mm centerlock

    Rear Hub

    Formula RXC-400, 12 x 142 mm centerlock

    Wheel Size

    700c

    Tires

    Vittoria Zaffiro Pro Bright Black, 700c x 30 mm, reflective

    Tire Width

    30 millimeters

    Handlebar Shape

    Drop Bar

    Handlebar

    C3, 6061 alloy, compact

    Stem

    C3, 6061 alloy, 31.8 mm, 7 deg.

    Saddle

    Fabric Scoop Shallow Sport, steel rails

    Pedals

    Not included

    Chain

    Shimano HG601, 11-speed

    Weight

    20 pounds

    Bike Weight

    Bike weight is based on median size, as sold, or the average of two median sizes.

    Gender

    Unisex

  • Size Chart

    44 CM 48 CM 51 CM 54 CM 56 CM 58 CM 61 CM
    Height Range 5'0" - 5'4" 5'2" - 5'6" 5'5" - 5'9" 5'7" - 5'11" 5'9" - 6'1" 6'0" - 6'4" 6'3" - 6'8"
    Reach 36.5 37.1 37.7 38.2 38.6 39.3 40.2
    Stack 51 53 55 57 59 61 64
    Effective Top Tube 50.5 51.7 53.1 54.7 56.1 57.9 60.4
    Seat Tube Center-Top 37.0 40.7 44.3 48.0 52.0 55.0 59.0
    Standover Height 68 71.2 74.2 77.3 80.4 83.3 86.8
    Head Tube Length 10.3 12.2 13.7 16.1 17.3 19.7 22.9
    Head Tube Angle (degrees) 70.2 70.8 71.7 71.7 73.0 73.0 73.0
    Seat Tube Angle (degrees) 74.7 74.6 74.3 73.9 73.5 73.0 72.5
    Wheelbase 27.0 27.0 27.0 27.2 27.2 27.5 27.5
    Chainstay 41.0 41.0 41.0 41.0 41.0 41.0 41.0
    Fork Offset 6.0 6.0 5.5 5.5 4.5 4.5 4.5

    Sizing Notes

    Measurements are stated in centimeters unless otherwise indicated.

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