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Kanzo Fast GRX 800 1x Gravel Bike

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Why We Like The Kanzo Fast GRX 800 1x Gravel Bike

Aero design meets gravel standards with the all-new Kanzo Fast GRX 800 1x Gravel Bike. The Kanzo Fast munches through gravel and longs for speeding through mixed terrain all day. The bike comes standard with 42mm of tire clearance to shed off chunky gravel and keep us floating above technical terrain. Integrated bar and stem also make for a speedy design while the aero wheels cut through the wind on our rides. Full hydraulic brakes complement the build and are a stark contrast to squeezing our cantilevers as tight as possible on the descents.

Gravel being an emerging trend has got bike manufacturers thinking hard about geometry and how a bike rides. Ridley makes no exception to that rule, speccing the bike with modern gravel numbers all while keeping an aero frame design. Gravel racing nowadays is more competitive than ever, and an aero advantage pays dividends after 10 hours in the saddle. The Kanzo comes equipped with a 71.5-degree head tube angle in a size medium which gives us a plenty aggressive bike that asks us to get in the drops and put the power down. Shortened chainstays and a slightly higher bottom bracket are mainstay features for any gravel bike and the Kanzo Fast checks the list in both.

Shimano GRX runs through the new Kanzo Fast in the drivetrain and braking departments. The GRX800 series drivetrain is made from premium alloy materials and also cuts grams when able, so climbing up that steep singletrack won't hurt quite as bad as usual. GRX is built with many of the mountain bike groupsets technology in effect, including a clutch derailleur and narrow-wide chainring. The XT cassette in the rear helps give us even more range, offering a 42t in the back to make it up even the steepest fire road climbs.

Intergration is aero and the Kanzo Fast doesn't skimp where saving watts and speed counts the most. The bike features an integrated handlebar as well as internal cable routing to keep parts and pieces out of the wind. The frame is specifically designed for aerodynamics and we're more than comfortable throwing a set of road tires on for some rides. Tubeless tires complement the build right out of the box, allowing for aggressive riding on terrain usually reserved for bikes with 2-inch tires. With the all-new Kanzo Fast we're hitting dirt roads hard and setting big PRs in the gravel race scene.


  • Ridley's all-new aero gravel bike for event dominating performance
  • Carbon frame layup keeps the weight low even in an aero package
  • Shimano GRX drivetrain offers robust performance in a lightweight design
  • Vittoria tread is infused with graphene to increase strength
  • 1x drivetrain is a no-fuss design ditching front derailleur weight
  • Strong hydraulic brakes bring the bike to a stop in no time
  • Aero alloy wheels cut through the wind
  • Integrated bar and step combo cuts grams
  • Item #RIDC05J
Frame Material
Deda HSE IN-4
Shimano GRX800
Rear Derailleur
Shimano GRX800
Rotor Vegast
Chainring Sizes
Crank Arm Length
[xx-small, x-small] 170mm, [small, medium, large] 172mm, [x-large] 175mm
Bottom Bracket
Shimano XT M8000
Cassette Range
Shimano GRX800
Brake Type
disc hydraulic
[front] Shimano RT-M800 140mm, [rear] Shimano RT-M800 160mm
Kanzo Fast Aero Handlebar
Handlebar Drop
Handlebar Width
[xx-small, x-small] 400mm, [small, medium, large] 420mm, [x-large] 440mm
Forza Aero Integrated
Stem Length
[xx-small] 80mm, [x-small] 90mm, [small, medium] 100mm, [large, x-large] 110mm
Selle Italia X-LR AIR-Cross Light
Kanzo Fast Aero Seatpost
Forza Norte alloy
Forza 3 Beaufort
Front Axle
12mm x 100mm
Rear Axle
12mm x 142mm
Tire Clearance
700c x 42mm
Vittoria Terreno Dry TLR
Tire Size
700c x 38mm
not included
Claimed Weight
[frame, M] 1190g
cyclocross, gravel, road
Manufacturer Warranty
2 years