Specification

Details

Model

Topstone 1

Vehicle Category

Gravel Road Bike

Application

Gravel-riding, exploring, bikepacking, performance commuting

Starting Price (2025)

$2,699.00 USD

Color Options

Obsidian

Specification

Details

Frame

Topstone, lightweight SmartForm C2 Alloy, 12x142 thru-axle, tapered headtube, BSA threaded BB, 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

Drivetrain Compatibility

Shimano GRX 820/600, 2x12-speed

Dropouts

12x100mm thru-axle (F), 12x142mm thru-axle (R)

Bottom Bracket

Shimano BSA 68

Crank

Shimano GRX 600, 46/30

Chain

Shimano HG M7100, 12-speed

Rear Derailleur

Shimano GRX 820, Shadow RD+

Front Derailleur

Shimano GRX 820

Shifters

Shimano GRX 600, 12-speed

Cassette

Shimano HG R7100, 11-34, 12-speed

Specification

Details

Seating

1 passenger (Fizik Aliante Delta, S-alloy rails)

Cargo Capacity

Multiple gear/bottle mounts

Wheels/Tyres

(F) WTB Riddler TCS Light, 700x37c, tubeless ready / (R) WTB Riddler TCS Light, 700x37c, tubeless ready

Wheel Size

700c

Brakes

Shimano GRX 400 hydraulic disc, 160/160mm RT64 rotors

Brake Levers

Shimano GRX 600 hydraulic disc

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)

Headset

Integrated, 1-1/8" - 1.5"

Saddle

Fizik Aliante Delta, S-alloy rails

Seatpost

Cannondale 3, 6061 Alloy, 27.2x350mm

Seatpost Clamp

Integrated

Grips

Cannondale Bar Tape, 3.5mm

Front Hub

Formula cartridge bearing, 12x100mm centerlock

Rear Hub

Formula cartridge bearing, 12x142mm centerlock

Rims

WTB ST i23 TCS, 28h, tubeless ready

Spokes

Stainless Steel, 14g

Exterior Features

Tubeless valves