Nukeproof Reactor 290 ST Factory Carbon Bike (XT)

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. 

Frame Construction:

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).

Adjustable Geometry:

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.

Suspension Design:

To ensure the bike could climb as well as it descends, we designed the four-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.

Full Specification List:

• Frame: Nukeproof Reactor 290 Carbon, 125mm Travel, UD woven Carbon Fibre frame, internal cable routing, ISCG 05 mounts, Enduro bearings, Threaded 73mm BB, Boost 148mm rear axle spacing, 3D contoured rubber frame protection
• Fork: Fox 34 Float, Factory Series, Kashima, Grip 2 Damper, 130mm, 44mm Offset, BOOST, Black
• Shock: Fox Float DPS, Factory Series, Kashima, 3 Position, EVOL LV, Custom LCL, LRL, CMF tune, 210×47.5mm, Bearing End 1x 0.2 Spacer fitted.
• Front Wheel: Reynolds TR309 XC Front 28h, 29″, Center-Lock, 110x15mm
• Rear Wheel: Reynolds TR289 XC Rear 28h, 29″, Center-Lock, 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 Derailleur: 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 RT-MT800, 180mm
• Rear Rotor: Shimano RT-MT800, 180mm
• Handlebars: Nukeproof Horizon Carbon V2 25mm Rise, Width – M780mm, L800mm, XL800mm
• Stem: Nukeproof Horizon, 45mm, Black
• Saddle: Nukeproof, Black
• Seatpost: Bikeyoke Divine Stealth w Shimano SL-MT500-IL Remote lever, M:160mm drop; L/XL:185mm drop
• Headset: Nukeproof, 44-56 IITS
• Grips: Nukeproof Sam Hill Signature
• Weight: TBD

Please Note: Due to severe delays in the bicycle supply chain, Nukeproof has been forced to make some alterations to the specification of the component parts supplied with this bicycle. As a result, the specification may differ from those shown in the images. Please refer to the specification table for accurate information.

Key Specifications:

Material: Ultra Strong T700/800 Monocoque Carbon Fibre
Fork Travel: 130mm
Axle to Crown: 537mm
Fork Offset: 44mm
Rear Travel: 130mm
Wheels Size: 29″
Max Tyre Size: 2.6″
Recommended Shock Sag (Measured seated): 30%
Shock Size: 210×47.5mm
Shock Hardware F: 25x8mm
Shock Hardware R: 30x8mm
Sizing: M/L/XL
Headtube: 44-56mm Tapered Semi-Integrated
Headset: ZS44-28.6 – T2 / ZS56/40 – B8
Bearings Required: 2x (6902 2RS), 4x (6800 2RS), 4x (6901 2RS)
Seatpost: 31.6mm (Internal Routing for Dropper Seatpost)
Seat Clamp: 36.4mm
BB: Threaded 73mm BSA
Rear Hub: Boost 148x12mm
Rear Axle: SRAM Maxle Stealth M12x1.75 180mm (Thread Length 20mm)
Chain Guide: ISCG05
Brake Mount: 180mm Direct Post
Protection: 3D Contoured Rubber Frame Protection for DT/SS/CS

Built, Tuned and Ready to Ride

Rest assured that each bike is fully built and tuned by Wiggle’s team of qualified bike mechanics to ensure your bike arrives in perfect condition. We supply all bikes with a set of plastic pedals, a pedal wrench and a multi-tool kit. Find out which size fits you by clicking the size chart tab.

Note: Manufacturer may reserve the right to change the specification of that listed or shown on this page.