The New NukeProof Reactor 290c ST Bike

The New NukeProof Reactor 290c ST Bike

NukeProof (United States) - Press Release: Crosscountry/backcountry/upcountry/downcountry/trail riding. However, you define it, essentially, it’s all about maximum bike time and getting out to explore natures elements. The new Reactor 290c ST is one of the most versatile bikes we’ve ever made and designed to do it all and everything in between. 

Using our awesome award winning Nukeproof Reactor 290 UD woven carbon fibre frame, the new “ST” is a limited-edition model designed as the ultimate lightweight, short travel trail weapon. It’s svelte build (Just 28lbs in size medium) is still seriously capable on technical terrain, thanks to the awesome suspension kinematics of the Reactor and the carefully spec components blending the balance between lightweight and robust. All to allow you to cover serious mileage faster, more efficiently and in more comfort, for all day fun in the saddle.

Suspension duties are taken care of with a 130mm Fox 34 Factory fork (Factory Reactor 290; 140mm of travel) paired with a 125mm Fox Float DPS rear shock (Factory Reactor 290; 130mm travel). Blending the best of trail/ enduro geometry (long, low and slack) with characteristics of an XC Race bike (lightweight spec and efficient suspension) to create a sprightly yet seriously capable machine. 

To help with efficiency and ensure that the ST out climbs even the fittest mountain goat, it’s spec’ed with Shimano’s XT 12-speed drivetrain offering a huge range from the 30t chainring combined with a 10-51t cassette. Finished with our own premium Horizon components and some fast rolling DT Swiss 1501 wheels wrapped in Maxxis Rekon rubber. Plus, it has all the “mod cons” for the aspiring XC/ trail/ Down country mountain bike riders; room for a large 750ml Water bottle, Threaded Bottom bracket, steep seat angle (a steep effective seat angle is nice but steep actual seat angle is more important!) and pretty easy on the eye with its stunning matt raw carbon finish, no paint saves a few grams too. 

The Science bit:

To ensure the Reactor 290c ST climb’s as well as it descends, we designed the 4 bar horst linkage to have higher levels of anti-squat for climbing gears but crucially lower levels when you drop down the cassette. This means that the bike can behave itself on the climbs but when you get it up to speed and drop the gears it turns into a trail hooligan.

The combination of low anti-squat and progressive rate give ultimate small bump compliance (removes rough trail and root chatter) with good mid stroke support for cornering/pumping and end stroke progression for aggressive riding. Balanced anti-rise figures allow the Reactor ST some squat when braking hard, maintaining rider position and providing a good amount of pressure through the tyre to ensure traction. The Reactor ST is designed to reward the rider and ensure you get that stoke factor in on any ride.  

The Reactor ST has a 66.8° (66.3° Low) head angle atop a 76.3° (75.8° Low) seat angle. Available in sizes Medium, Large and X-Large. The Reactor ST frames feature the same “flip chip” design as the regular Reactor frame to adjust the geometry from “Trail” to “Rail mode”.

  • Trail – As the name suggests is designed for maximum efficiency on the trail. With balanced geometry the Reactor ST will climb fast, whilst still offering riders confidence on technical descents.
  • Rail – The Rail setting turns the Reactor ST into a more aggressive machine, dropping the bottom bracket 6mm and slackening the head angle by half a degree. It is there to maximise the descending capabilities.

The Reactor 290c ST will be available in limited numbers from your local

Nukeproof dealer or online from the 30th April 2020. 

Full Spec List: 

  • Fork: Fox 34 Float, Factory Series, Kashima, Fit 4 Damper, 130mm, 51mm Offset, BOOST, Black
  • Shock: Fox Float DPS, Factory Series, Kashima, 3 Position, EVOL, Custom LCL, LRL, CMF tune, 5mm, Bearing End (0.2 Spacer fitted.)
  • Front Wheel: DT Swiss XM1501 SPLINE 25,29″, Centrelock, 110x15mm
  • Rear Wheel: DT Swiss XM1501 SPLINE 25, 29″, Centrelock, Shimano Microspline Driver, 148x12mm
  • Tyres: Maxxis Rekon Race 29”x2.35 EXO/TR
  • Crankset: Shimano XT M8100 12-Speed, Hollowtech 2, 170mm, 30T, 52mm Chainline
  • Shifter: Shimano XT M8100-R, 12-speed Rapidfire Plus, I-Spec EV
  • Rear Deraileur: Shimano XT M8100, SGS 12-Speed, Shadow Plus
  • Chain: Shimano XT M8100 HG 12-speed Inc Quicklink
  • Cassette: Shimano XT M8100-12, 12-Speed (HYPERGLIDE+), 10-51T
  • Brakes: Shimano XT M8100, 2 Pot Brake, Metallic Pads
  • Front Rotor: Shimano MT800, 180mm
  • Rear Rotor: Shimano MT800, 180mm
  • Handlebars: Nukeproof Horizon 25mm Rise, Width – M780mm, L800mm, XL800mm)
  • Stem: Nukeproof Horizon, 50mm, Black
  • Saddle: Nukeproof Horizon SL, Orange
  • Seatpost: RockShox Reverb Stealth with 1x Remote, 31.6mm; S: 346mm length, 125mm drop; M: 409mm length, 150mm drop; L: 462mm length, 175mm drop; XL: 514.5mm length, 200mm drop
  • Headset: Nukeproof, 44-56 IITS
  • Grips: Nukeproof Sam Hill Signature
  • Weight: 28lbs

Photo: Roo Fowler. 

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