Crosscountry/backcountry/upcountry/downcountry: However you define it, the Reactor ST does it all and everything in between! It just might be the most versatile bike we have ever made.
The Nukeproof Reactor 290 ST; a limited edition lightweight, short travel version of the Reactor that is designed to tackle serious miles efficiently and comfortably, for all day fun in the saddle.
With a 130mm fork combined with 125mm of rear suspension, the Reactor ST combines the best of an enduro bike (long, low and slack) with the best of an XC Race bike (lightweight spec and efficient suspension) to create a sprightly yet seriously capable machine.
To optimise the weight, strength and stiffness, the Reactor 290 ST Carbon frame features a full UD woven carbon fibre frameset (Including chain and seat stays).
The Reactor ST features a 66.8° (66.3° Low) Headangle atop a 76.3° (75.8° Low) seat angle across a 460mm reach on a Medium frame. We also offer the frame in Large and X-Large sizes. 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, this setting is best suited for trail riding. It is for riders who get as much enjoyment from the climb as the 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.
To ensure the bike could climb as well as it descends, we designed the 4 bar horst linkage to have higher levels of anti-squat for climbing gears but 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, 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.
Frame Nukeproof Reactor 290 Carbon, 140mm Travel, UD woven Carbon Fibre front triangle/chain stays/seat stays, internal cable routing, custom tuned rear shock, Enduro bearings, threaded bottom bracket, boost 148mm rear axle spacing, 3D contoured frame protection
Fork Fox 34 Float, Factory Series, Kashima, Grip 2 Damper, 130mm, 44mm Offset, BOOST, Black (SHORT ID: D6GS)
Shock Fox Float DPS, Factory Series, Kashima, 3 Position, EVOL LV, Custom LCL, LRL, CMF tune, 210x47.5mm, Bearing End 1x 0.2 Spacer fitted. (SHORT ID: D6S5)
Front Wheel DT Swiss M1700 SPLINE 30,29", 6 bolt, 110x15mm
Rear Wheel DT Swiss M1700 SPLINE 30, 29", 6 bolt, Shimano Microspline Driver, 148x12mm
Tyres Front: Maxxis Minion DHF 29”x2.3 3C MaxxTerra/EXO/TR, Rear: Maxxis Agressor 29”x2.3 MaxxTerra/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
Cassette Shimano XT M8100-12, 12-Speed (HYPERGLIDE+), 10-51T
Brakes Shimano XT M8100, 2 Pot Brake, Metallic Pads
Rotors Shimano SM-RT76, 180mm (Front), 180mm (Rear)
Handlebars Nukeproof Horizon Carbon V2 25mm Rise, Width - M780mm, L800mm, XL800mm)
Stem Nukeproof Horizon, 50mm, Black
Grips Nukeproof Sam Hill Signature
Saddle Nukeproof Horizon SL
Seatpost Bikeyoke Divine Stealth w Shimano SL-MT500-IL Remote lever, M/L:160mm drop; XL:185mm drop
Headset Nukeproof, 44-56 IITS
Weight 13.2Kgs/29lbs (Tubeless)