Nukeproof Reactor 290 WORX Carbon Bike

To celebrate 30 years of Nukeproof, we have created the Reactor 290 WORX. A limited-edition flagship Reactor 290c frame equipped with state-of-the-art & top-of-the-line components, with one aim; to offer riders the ultimate trail bike possible today.

The Reactor name is taken from Nukeproof’s original 1995 trail bike, but a lot has changed in the last 25 years and the new Reactor platform is a truly modern trail weapon. Designed to be home on steep technical climbs or all-day epic adventures, but happiest when thrashing the most technical trails you can point it at. The Reactor’s Kinematics, geometry and specification are all designed from the ground up to offer riders the definitive aggressive trail bike.

In 2020 Sram launched the Eagle AXS and Reverb AXS systems to offer riders the next level of personalization and control through wireless technology. By removing the clutter and complexity, they streamlined the cockpit and created the ultimate performance drivetrain and dropper set up. AXS is designed to be simple to set up and maintain thanks to the latest pure shifting technology. This means that the performance is always outstanding and consistent even under load and the roughest terrain. To enhance the connection to the bike the AXS systems can be personalised to your riding preferences with the AXS App.

Using these latest technologies, the limited edition Reactor 290c WORX blends an aggressive frame design with lightweight, high performance components and the latest braking and suspension packages to create the ultimate trail weapon.

Frame Construction:

To optimise the weight, strength and stiffness, the Reactor Carbon frame features a full UD woven carbon fibre frameset (Including chain and seat stays).

The WORX model features a clear coat finish so you will be able to see the UD woven carbon underneath.

Adjustable Geometry:

All Reactor frames feature a “flip chip” 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 into a corner shredder, 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 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 some squat when braking hard, maintaining rider position and providing a good amount of pressure through the tyre to ensure traction. The Reactor is designed to reward the rider and ensure you get that stoke factor in on any ride.


Reactor 290 Carbon
Material: Ultra Strong T700/800 Monocoque Carbon Fibre
Fork Travel: 140mm
Axle to Crown: 554mm
Fork Offset: 51mm
Shock Travel: 130mm
Wheels Size: 29″
Max Tyre Size: 2.6″
Shock Size: 210x50mm
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 NP-5 (6902 2RS), 4x NP-7 (6800 2RS), 4x NP-106 (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
Chain Guide: ISCG05
Brake Mount: 180mm Direct Post
Protection: 3D Contoured Rubber Frame Protection for DT/SS/CS




FrameNukeproof Reactor 290 Carbon, 130mm 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
ForkRockShox Pike Ultimate Charger 2 RC2 140mm, 51mm Offset, BOOST, Debonair, Gloss Silver
ShockRockShox Super Deluxe Ultimate RCT, Custom ML 380 tune, 210x50mm, Bearing End (Comes with 1x bottomless token fitted so you have one if needed.)
Front Wheel DT Swiss XM1501 30,29", 110x15mm
Rear Wheel DT Swiss XM1501 30, 29", 148x12mm
TyresMaxxis Assegai 29”x2.5 WT 3C MaxxTerra/EXO+/TR, Rear: Maxxis Minion DHR II 29”x2.4 WT 3C MaxxTerra/EXO+/TR
Crankset SRAM XO1 Carbon Eagle 12-Speed, 170mm, 30T, B148, DUB
Shifter SRAM Eagle AXS 2 button 12-Speed
Rear DeraileurSRAM XO1 Eagle AXS 12-Speed
CassetteSRAM XG-1295 EAGLE, 12-Speed,10-50T
BrakesSRAM G2 Ultimate
RotorsSRAM Centerline 200mm (Front), 180mm (Rear)
HandlebarsNukeproof Horizon Carbon 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm)
StemNukeproof Horizon, 50mm, Black
Grips Nukeproof Sam Hill Signature
SaddleNukeproof Horizon SL, Red
SeatpostRockShox Reverb AXS with AXS Remote, 31.6mm; M: 440mm length, 150mm drop; L + XL: 480mm length, 170mm drop.
HeadsetNukeproof, 44-56 IITS


Ultra Strong T700/800 Monocoque Carbon Fibre
Trail/ Rail flip chip
Threaded 73mm BSA
Boost 148mm Rear axle spacing


KEY Small Medium Large Extra Large
Seat TubeNA 420/16.5"460/18"510/20"
Effective Top TubeNA610640675
Head AngleNA66 (Rail 65.5) 66 (Rail 65.5) 66 (Rail 65.5)
Head TubeNA105110115
Effective Seat Tube AngleNA75.5 (Rail 75)75.5 (Rail 75)75.5 (Rail 75)
Chain StayNA440440440
Bottom Bracket DropNA-33 (Rail: -39) -33 (Rail: -39) -33 (Rail: -39)
Fork TravelNA140140140
Fork Offset NA515151
Axle to Crown NA554554554