Cannondale Synapse Carbon 4 Bike

Features

• Lightweight carbon construction features subtle aerodynamic shaping of the frame and fork for riding fast
• Discreet flex zones in the rear triangle, seat tube and seatpost absorb road chatter and bumps without adding weight or isolating you from the ride experience
• 10-speed Shimano Tiagra groupset with hydraulic disc brakes gives you 20 gears to thrive on the open road, up and down hills, and on rough pavement
• Thru-axle is compatible with bike trainers for days when you can’t go outside (trainer not included)
• Compatible with Cannondale SmartSense cycling tech (SmartSense battery, lights and radar not included)
• Integrated connectivity with the Cannondale App
• Pedals not included
• Specs and images are subject to change

Imported.

This bike comes with Coast to Coast Support, which includes:

• 1 year of free adjustments (see more below)
• In-store bike assembly
• Pickup in store or curbside
• Bike experts available at 170+ bike shops

REI Co-op Members get more:

• Free flat tire repairs (labor only; parts not included)
• 20% off shop services

More about our free adjustments: 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 the Cannondale Synapse Product LineView all Cannondale Endurance Bikes

Technical Specs

Best Use

Frame

Bike Suspension

Fork

Crankset

Bottom Bracket

Shifters

Front Derailleur

Rear Derailleur

Rear Cogs

Number of Gears

Brake Type

Brakes

Rims

Front Hub

Rear Hub

Wheel Size

Tires

Tire Width

Handlebar Shape

Handlebar

Stem

Seat Post

Saddle

Pedals

Headset

Chain

Weight

Gender

Road Cycling

Synapse Carbon

No Suspension

Synapse Carbon, integrated crown race, Proportional Response size-specific design, 12 x 100 mm thru-axle, thru-tube internal routing, hidden fender mounts

Shimano Tiagra, BSA, 50/34

Shimano BSA

10-speed

Shimano Tiagra, braze-on

Shimano Tiagra GS

11-34, 10-speed

20 gear(s)

Hydraulic Disc Brake

Shimano Tiagra hydraulic disc, 160/160 mm RT64 rotors

RD 3.1, 28h, 21mm IW

Formula CL-712, 12x100mm centerlock

Formula RXC-400, 12x142mm centerlock

700c

Vittoria Zaffiro Pro Reflective, 700c x 30 mm

30 millimeters

Drop Bar

Cannondale 3, 6061 Alloy, Compact

Cannondale 3, 6061 Alloy, 31.8, 7 degree

Cannondale 3, 6061 Alloy, 27.2 x 350 mm (48-56), 400 mm (58-61)

Fizik Aliante Delta, S-alloy rails

Not included

1-1/4″-1-1/8

Shimano HG54, 10-speed

Unavailable

Unisex

Size Chart

48 CM51 CM54 CM56 CM58 CM61 CMHeight Range

Reach

Stack

Effective Top Tube

Seat Tube Center-Top

Standover Height

Head Tube Length

Head Tube Angle (degrees)

Seat Tube Angle (degrees)

Bottom Bracket Height

Wheelbase

Chainstay

Fork Offset

5’2”-5’6”	5’5”-5’9”	5’7”-5’11”	5’9”-6’1”	6’0”-6’4”	6’3”-6’8”
37.1	37.6	38.1	38.7	39.3	40.2
53	55	57	59	61	64
53.3	54.4	55.5	56.7	57.9	59.8
40.7	44.3	48	52	55	59
71.2	74.2	77.3	78.7	83.3	86.8
10.9	13	14.3	16.4	18.7	21.8
71.3	71.4	73.1	73.2	73.3	73.4
73	73	73	73	73	73
27	27	27.2	27.2	27.5	27.5
99.1	100.2	98.7	99.8	101.1	102.8
41.5	41.5	41.5	41.5	41.5	41.5
5.5	5.5	4.5	4.5	4.5	4.5

Sizing Notes

Measurements are stated in centimeters unless otherwise indicated.

How we measure bikes

bike diagram loading

Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.

Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.

Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.

Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.

Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.

Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.

Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)

Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).

Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.

Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.

Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.

Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.