With the grip and comfort of Kingpin suspension and lightweight durability of a carbon frameset nothing is off-limits—from dirt roads to singletrack trails—on the Cannondale Topstone Carbon 4 bike.
- Lightweight Topstone carbon frameset with Proportional Response construction and Kingpin suspension
- SmartSense compatible with integrated Cannondale App connectivity
- Gravel-specific Shimano GRX 600/400 10-speed shifting
- DirectLine internal cable routing; flat-mount disc
- Includes gear, fender and bottle mounts; removable fender bridge
- 27.2 mm dropper post-ready
- NOTE: Specs and images are subject to change based on component availability
Imported.
- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
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.
| Best Use | Gravel Cycling |
|---|---|
| Frame | Topstone carbon |
| Fork | Carbon with 1-1/8 to 1-1/2 in. steerer, 55 mm OutFront offset |
| Bike Suspension | Rear Suspension |
| Crankset | Shimano GRX 600, 46/30T |
| Bottom Bracket | Shimano BSA 68 mm threaded |
| Shifters | Shimano GRX 400, 10-speed |
| Front Derailleur | Shimano GRX 400, braze-on |
| Rear Derailleur | Shimano GRX 400, Shadow RD+ |
| Rear Cogs | Shimano HG500 10-speed, 11-34T |
| Number of Gears | 20 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Shimano GRX 400 hydraulic disc, 160/160 mm RT54 rotors |
| Brake Levers | Shimano GRX 400 hydraulic disc |
| Rims | WTB ST i23 TCS, 700c, 28-hole, tubeless ready |
| Front Hub | Formula cartridge bearing, 12 x 100 mm thru axle, Center Lock disc |
| Rear Hub | Formula cartridge bearing, 12 x 142 mm thru axle, Center Lock disc |
| Wheel Size | 700c |
| Tires | WTB Riddler Comp 700c x 45 mm |
| Tire Width | 45 millimeters |
| Handlebar Shape | Drop Bar |
| Handlebar | Cannondale 3 butted 6061 alloy, 16 deg. flare drop |
| Stem | Cannondale 3 6061 alloy, 31.8 mm, 7 deg. |
| Seat Post | Cannondale 3 6061 alloy, 27.2 x 350 mm |
| Saddle | Fizik Aliante Delta, S-alloy rails |
| Pedals | Not included |
| Headset | 1-1/8 to 1-1/2 in. |
| Chain | KMC X10, 10-speed |
| Weight | 20 lbs. 13 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Height Range | 4'10''-5'5'' | 5'3''-5'9'' | 5'7''-6'1'' | 5'10''-6'4'' | 6'0''-6'8'' |
| Reach | 37.1 | 37.7 | 38.3 | 39.0 | 39.7 |
| Stack | 53.4 | 55.1 | 57.4 | 60.0 | 62.4 |
| Effective Top Tube | 53.3 | 54.4 | 55.7 | 57.2 | 58.7 |
| Seat Tube Center-Top | 41.0 | 45.8 | 50.5 | 55.3 | 59.0 |
| Standover Height | 70.4 | 74.5 | 78.5 | 82.3 | 85.7 |
| Head Tube Length | 10.5 | 12.3 | 15.0 | 17.7 | 20.5 |
| Head Tube Angle (degrees) | 70.0 | 71.2 | 71.2 | 71.2 | 71.2 |
| Seat Tube Angle (degrees) | 71.4 | 71.6 | 71.8 | 71.9 | 72.1 |
| Bottom Bracket Height | 27.8 | 28.3 | 28.5 | 28.5 | 28.8 |
| Wheelbase | 101.0 | 101.3 | 102.9 | 104.4 | 106.1 |
| Chainstay | 42.0 | 42.0 | 42.0 | 42.0 | 42.0 |
| Fork Offset | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
Sizing Notes
Measurements are stated in centimeters unless otherwise indicated.
How we measure bikes
- 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.