$4,850.00 $5,950.00 saving $1,100.00


$4,850.00 $5,950.00 saving $1,100.00

Introducing the all new Nukeproof Reactor: an old school name with a very new school look. Although it takes its name from the original 1996 Nukeproof Reactor trail frame, a lot has changed in the last 23 years as it runs an all new trail focused platform.

From concept through to design, the Kinematics, the geometry and specification; the Reactor is designed from the ground up to be the ultimate aggressive trail bike. It is at home on technical climbs, but happiest when thrashing the most technical trails you can point it at.

The RS model is the hooligan spec option in the range, with a host of upgrades to make it burlier than the rest. It features a +10mm Rockshox Lyrik Ultimate RCT3 forks (160mm) up front, a Rockshox Super Deluxe Ultimate RCT rear shock, our award-winning carbon handlebars, 4 Pot Code RSC brakes (With Sintered Pads), a SRAM XO1 Eagle Drivechain with Carbon Descendant Cranks and Mavic’s brand new Deemax DH wheelset.

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). It is available for 27.5” or 29” wheel sizes. These are two totally different, compromise free frames that were designed and developed at the same time.  Each frame is simply tailored around each wheel size.

Speed or play: which do you value more? The manoeuvrability of 27.5” or the raw speed of a 29”?

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



    Frame Nukeproof Reactor 290 Carbon, 130mm Rear 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 36 Float, Performance Series, Grip Damper, 140mm, 51mm Offset, BOOST, Black
    Shock Fox Float DPX2, Performance Series, 3 Position, EVOL, Custom CL, LRL tune, 210x50mm, Bearing End (0.2 Spacer fitted.)
    Front Wheel DT Swiss M1900 SPLINE 29", Centrelock, 110x15mm
    Rear Wheel DT Swiss M1900 SPLINE 29", Centrelock, Shimano Microspline Driver, 148x12mm
    Tyres Front: Maxxis Assegai 29”x2.5 WT 3C MaxxTerra/EXO+/TR, Rear: Maxxis Minion DHR II 29”x2.4 WT 3C MaxxTerra/EXO+/TR
    Crankset Shimano SLX M7100 12-Speed, Hollowtech 2, 170mm, 30T, 52mm Chainline
    Shifter Shimano SLX M7100-IR, 12-speed Rapidfire Plus, I-Spec EV
    Rear Deraileur Shimano SLX M7100, SGS 12-Speed, Shadow Plus
    Cassette Shimano SLX M7100-12, 12-Speed (HYPERGLIDE+), 10-51T
    Brakes Shimano SLX M7120, 4 Pot Brake, Metallic Pads
    Rotors Shimano RT70, 203mm (Front), 180mm (Rear)
    Handlebars Nukeproof Horizon 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm)
    Stem Nukeproof Neutron, 45mm, Black
    Grips Nukeproof Sam Hill Signature
    Saddle Nukeproof Horizon SL, Black
    Seatpost Brand X Ascend internal, 31.6mm; S:125mm drop; M/L:150mm drop; XL: 170mm Drop
    Headset Nukeproof, 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 Tube NA 420/16.5" 460/18" 510/20"
    Effective Top Tube NA 610 640 675
    Head Angle NA 66 (Rail 65.5) 66 (Rail 65.5) 66 (Rail 65.5)
    Head Tube NA 105 110 115
    Effective Seat Tube Angle NA 75.5 (Rail 75) 75.5 (Rail 75) 75.5 (Rail 75)
    Wheelbase NA 1205 1235 1271
    Chain Stay NA 440 440 440
    Bottom Bracket Drop NA -33 (Rail: -39) -33 (Rail: -39) -33 (Rail: -39)
    Reach NA 451 480 514
    Fork Travel NA 140 140 140
    Fork Offset NA 51 51 51
    Axle to Crown NA 554 554 554
    Stack NA 615 620 625