Cannondale Topstone 2 GRX 2x
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Explore further. Ride freer.
An amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute.
Product details
Overview & Features
Explore further. Ride freer.
An amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute.
Two rings, endless possibilities. This Topstone is built to tackle the toughest gravel rides with Shimano GRX 400 2x10-speed shifting and a SmartForm C2 Alloy frame. With ample tire clearance and mounts for racks and gear, it’s engineered to meet the demands of adventurous riders and unpredictable routes.
Gravel-riding, exploring, bikepacking, performance commuting
Key features
- Lightweight SmartForm C2 Alloy frame w/ full carbon fork
- Reliably precise shifting from the Shimano GRX 400, wide-range, 2x10-speed gravel drivetrain
- Powerful, controllable braking from Shimano’s GRX400 hydraulic disc brakes
- Selle Royal SRX Open saddle balances supportive padding and a pressure-relieving central channel for performance comfort
Technical Specifications
Platform Topstone Alloy
Model Name Topstone 2 GRX - 2x
Model Code C15235U
Frame Topstone, lightweight SmartForm C2 Alloy, 12x142 thru-axle, tapered headtube, BSA threaded BBm flat mount disc, StraightShot internal cable routing, multiple gear/bottle mounts
Fork Topstone Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle, fender/gear mounts
Headset Integrated, 1-1/8" - 1.5"
Rear Derailleur Shimano GRX 400, Shadow RD+
Front Derailleur Shimano GRX 400
Shifters Shimano GRX 400, 10-speed
Chain Shimano HG54, 10-speed
Crank Shimano GRX 400 46/30
Rear Cogs Shimano HG500, 11-32, 10-speed
Bottom Bracket Shimano BSA 68
Brakes Shimano GRX 400 hydraulic disc, 160/160mm RT30 centerlock rotors
Brake Levers Shimano GRX 400 hydraulic disc
Front Hub Shimano TC500, 12x100mm centerlock
Rear Hub Shimano TC500, 12x142mm centerlock
Rims GXD 1.0, 28h, 23mm internal width, tubeless ready
Spokes Stainless Steel, 14g
Tire Size 37
Wheel Size 700c
Tires WTB Riddler TCS Light, 700x37c, tubeless ready
Front Tire WTB Riddler TCS Light, 700x37c, tubeless ready
Rear Tire WTB Riddler TCS Light, 700x37c, tubeless ready
Handlebar Cannondale 3, butted 6061 Alloy, 16 deg flare drop: 400mm (XS), 420mm (SM-MD), 440mm (LG-XL)
Stem Cannondale 3, 6061 Alloy, 31.8, 7°: 80mm (XS), 90mm (SM-MD), 100mm (LG-XL)
Grips Cannondale Knurl Cork, 2.7mm
Saddle Selle Royal SRX Open
Seatpost Cannondale 3, 6061 Alloy, 27.2x350mm
Extra 1 Tubeless valves
Sizing & Fit
Available sizes
M, S
Warranty & Support
The supplied Cannondale policy dated March 26, 2026 lists lifetime-of-product coverage for specified frame structures and shock links on models introduced in 2026 or later; registration is required to activate the lifetime frame warranty. Paint, decals and Cannondale-branded components have separate one-year terms. Older models require the prior policy, so the applicable terms for this bike must be confirmed.
The supplied policy is dated March 26, 2026 and distinguishes models introduced in 2026 and later from older models. Registration is required for the lifetime frame warranty. Use the original prior-policy links below for older models. For warranty support on Cannondale Topstone 2 GRX 2x, contact Yellow Jersey with your original proof of purchase. Coverage is subject to the applicable product, ownership, registration and regional conditions; normal wear, misuse and accidental damage are excluded where stated in the full policy.
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