Reactor Alloy Pro 290 2026

Designed by Nukeproof to be the ultimate aggressive trail mountain bike we reckon this is one of the best choices for UK trail riding. Suitable for a blast round the UK's trail centres yet more than equipped to handle the much loved bikeparks you cannot possibly go wrong on a Reactor.

As a trail bike the Reactor is a strong climber and rapid descender thanks to it's modern aggressive geometry. All Reactors feature a 2-stage flip-chip to swap the Reactor between Trail (for more pedal efficiency) or Rail (Shred mode) settings and further tailor your ride to the location.

Constructed from a hydroformed and butted 6061 T6 aluminium alloy, with carbon fibre seat stays to reduce unsprung mass and optimise lateral stiffness. The Reactor delivers the perfect blend of low weight, strength, and stiffness.

Made for long days in the saddle, it’s your go-anywhere trail weapon—ready for epic adventures where a 1,000m climb leads to a 1,000m descent. Whatever the trail throws at you, the Reactor 290 Alloy is built to take it on.

SIZING -

• S: >5'7"
• M: 5'7"-5'11"
• L: 5'11-6'1"
• XL: 6'1"-6'5"
• XXL: <6'5"

Specifications::Reactor Alloy 290 Pro

• Discipline: Trail

• Material: Aluminium

• Front Travel: 150mm

• Rear Travel: 130mm

• Wheel Size: 29"

• Warranty: 5 years (frame)

Frame - Nukeproof Reactor 290 Alloy, 130mm Travel, custom triple butted hydro-formed tube set for front triangle and chain stays, UD woven carbon fibre Seat stays, internal cable routing, internal cable routing, ISCG 05 mount, Enduro bearings, threaded 73mm BB, Boost 148mm rear axle spacing, 3D contoured rubber frame protection
Fork - RockShox Lyrik Select + Charger 3.1 RC2 150mm, 44mm Offset, BOOST, Debonair, Gloss Black
Shock - RockShox Super Deluxe Select+, Custom Compression LIN, Rebound L 320 tune, 210x50mm, Bearing End, 1x bottomless token fitted
Wheelset - DT Swiss M1900 Spline, Boost, HG freehub
Tyres - Front: Schwalbe Magic Mary Evo Super Trail 29x2.4" Rear: Schwalbe Nobby Nic Evo Super Trail 29x2.4"
Crankset - SRAM GX Eagle 12-Speed, 165mm, 32T, T-Type
Shifter - SRAM GX Eagle 12-Speed
Rear Derailleur - SRAM Eagle 90
Chain - SRAM GX Eagle 12-Speed
Cassette - SRAM GX Eagle 12-Speed, XS1270 EAGLE T-Type 10-52T
Brakes - SRAM Maven Base
Front Rotor - SRAM Centreline, 200mm
Rear Rotor - SRAM Centreline, 180mm
Handlebars - Nukeproof Horizon V2 25mm Rise, Width - M780mm, L800mm, XL800mm
Stem - Nukeproof Neutron AM, 45mm, black
Saddle - Nukeproof Horizon SL
Seatpost -Tranz-X YS108 Internal with SRAM Remote lever
Headset - Nukeproof, 44-56 IITS
Grips - Nukeproof Sam Hill Signature
Bearings - Enduro Bearings