Nukeproof Reactor 290 ST Factory Carbon Bike (XT)

Nukeproof Reactor 290 ST Factory Carbon Bike (XT – 2022)

A limited edition model, the slightly shorter rear travel on the Reactor 290 ST model makes it perfect for day-long trail sessions, so you can ride in comfort and control for much longer. This multi-purpose ride is built around a T700/800 Monocoque Carbon Fibre frame and equipped with Fox Factory suspension and a slick operating Shimano XT 12-speed drivetrain.

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 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.

Features:

• Frame: Nukeproof Reactor 290 Carbon, 125mm rear 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 29×2.3“ 3C MaxxTerra/EXO/TR, Rear: Maxxis Agressor 29×2.3″ 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: TBC

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 above 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

Technologies:

• Flip Chip Adjustable Suspension Geometry: All models of the Reactor feature a “flip-chip”, so that the bike geometry can be easily adjusted from “Trail” to “Rail” mode without having to custom tune your suspension setup. The Trail setting is best suited for pumping and carving your rhythm and style into the mountainside and still caters for rides who love the climb as much as the descent. On the other hand, the Rail setting turns the Reactor into an adrenaline-fuelled gravity tamer. Dropping the bottom bracket height by 6mm and slackening the head angle by half a degree, these changes give this Reactor greater stability and control when the trail leans downhill towards vertical
• Nukeproof 4-Bar Horst Linkage Suspension Design: Ensuring the bike can climb as well as it descends, Nukeproof focussed on fine-tuning their 4-Bar Horst linkage suspension setup to give higher levels of anti-squat performance when higher up the cassette in the climbing gears, but also to deliver greater trail-gobbling performance when you drop down the cassette and begin descending the mountain. This means that the bike behaves itself on the climbs and grips with unprecedented traction and efficiency when making your way back towards sea-level. When you get it up to speed and drop a few gears to carry momentum, this bike turns into a trail hooligan and helps you carve the trail with style. The combination of low anti-squat and progressive suspension-rate give it the ultimate in small bump compliance (removes rough trail and root chatter) with good mid-stroke support for cornering/pumping and end stroke progression for aggressive riding. With balanced anti-rise suspension performance, the Reactor provides some squat when braking hard, maintaining rider position and providing a good amount of pressure through the tyre to ensure stability and traction. The Reactor is designed to reward the rider and ensure you get that stoke factor in on any ride

Easy Assembly

When you order a bike, one of our trained mechanics will carefully prepare and pack your bike for shipping. Upon delivery, the assembly is simple and all necessary tools are conveniently included in the box.

Depending on the delivery service and destination, bikes will either be delivered in a large or a small box. Below is a guide as to how your bike will arrive:

• All bikes for delivery within the UK and Republic of Ireland will be delivered in a large box, except for kids’ bikes and BMX bikes, which are always delivered in manufacturer’s boxes.
• All bikes for delivery within the EU on a standard service will be delivered in a large box. If an express delivery option is chosen, your bike will be packed into a small box. Again, the exception is kids’ bikes and BMX bikes, which are always delivered in manufacturer’s boxes.
• All bikes for worldwide delivery outside the EU will be delivered in small boxes.

This video demonstrates assembly from a SMALL BOX.

This video demonstrates assembly from a LARGE BOX.

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