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Cannondale Topstone Carbon 3 GRX 2x
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PRODUCT DESCRIPTION
Topstone Carbon 3 GRX – 2x
Always ready. The Topstone Carbon 3 GRX – 2x is your go-to gravel bike: lightweight, comfortable, and tireless on any terrain. The carbon frame with Kingpin suspension dampens vibrations and bumps without the need for complex shock absorbers, improving control, traction, and comfort over long distances.
The Shimano GRX 2×12 drivetrain (46/30 crankset and 11–36 cassette) offers a wide and progressive gear range: from steep dirt roads to long stretches on asphalt, you'll always have the right gear. With multiple bottle/bag mounts and the internal StashPort compartment in the down tube, it's designed for gravel, endurance, and bikepacking .
Why choose it
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Comfort that makes you go faster: Kingpin absorbs the roughness of the terrain, leaving you more energy for speed.
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Always the right gear ratios: double 46/30 + 12v 11–36 for tough climbs and fast flats.
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Gravel reliability: GRX hydraulic brakes, WTB TCS tubeless-ready rims, and WTB Resolute 700x42c tires for grip and smoothness.
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Clean and practical: internal cable routing, threaded BSA bottom bracket, UDH for easy maintenance and spare parts.
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Tailored Setup: Size-specific Proportional Response geometry and layup.
Technical specifications
| Voice | Detail |
|---|---|
| Platform | Topstone Carbon |
| Model Name | Topstone Carbon 3 GRX 2x |
| Model Code | C15345U |
| Chassis | Topstone Carbon, Kingpin , Proportional Response, StashPort in the down tube, internal cable routing, 12×142 mm, 27.2 seatpost (dropper-ready), UDH , BB BSA 68 mm, flat mount, removable fender bridge, multiple mounts |
| Fork | Topstone Carbon, 1-1/8”–1.5” steerer, 55 mm OutFront offset, flat mount, internal routing, 12×100, triple boss/fender mounts |
| Headset | Acros IS52/40 ICR |
| Rear derailleur | Shimano GRX 820 Shadow RD+ |
| Front derailleur | Shimano GRX 820 |
| Gear/brake levers | Shimano GRX 610 12v hydraulic |
| Crankset | Shimano GRX 610 , 46/30 |
| Sprocket pack | Shimano HG710 , 11–36, 12v |
| Chain | Shimano M7100 , 12v |
| Brakes | Shimano GRX 610 hydraulic |
| Rotors | Shimano RT70 160/160 mm (flat mount, centerlock) |
| Circles | WTB ST i25 TCS , 28h, tubeless ready |
| Rays | 14g stainless steel |
| Hubs | Ant. Shimano TC500 12×100 CL / Rear. Shimano TC500 12×142 CL |
| Wheel size | 700c |
| Tires | WTB Resolute TCS Light , 700×42c, tubeless ready |
| Handlebar | Cannondale 3 , butted 6061 aluminum, drop with 16° flare |
| Handlebar stem | Cannondale C1 Conceal , Alloy, 31.8, −6° |
| Grips/Tape | Cannondale KnurlCork 2.7 mm |
| Saddle | Selle Royal SRX Open |
| Seatpost | Cannondale 3 , 6061 aluminum, 27.2×350 mm |
| Connectivity | Cannondale Wheel Sensor |
| Notes | Specifications subject to change without notice based on component availability |
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