The Nukeproof Reactor 290 Carbon Factory ST: Short travel, big fun
A short travel trail hooligan, dual slalom trickster, and mile-munching adventure machine, all in one versatile package.
The Reactor ST is a short-travel version of our 2021 Trail Bike of the Year. Using the same T700/800 unidirectional carbon frame, rear travel is reduced to 125mm and features a lightweight build kit for riders that want to get out for big mileage and overnight adventures.
As with the rest of the Reactor range, this short travel specialist is fitted with a geometry-altering “flip chip”, offering riders both “Trail” and “Rail” modes. Trail balances optimized geometry for ultra-efficient climbing and descending while the Rail mode emphasizes the downhill — dropping the bottom bracket 6mm and slackening the head tube angle by half a degree.
How it Rides
The specs of the Reactor 290 ST make for a bike that is extremely efficient when on the pedals, but more than capable of tackling technical terrain. It's lightweight, fast, playful, and fun.
The Reactor ST 290c is a perfect mix of trail hooligan and XC sophistication – is this what people are calling “down country”?
The Nukeproof Reactor 290 Carbon Factory ST Component Details
- Fox 34 Float Factory Series fork & Float DPS Factory Series shock
- Shimano XT 12-speed drivetrain
- Hayes Dominion 4-piston brakes
- Reynolds TR 309/289 carbon 29-inch tubeless wheels
- Maxxis Minion DHF 29x2.3 front tire & Aggressor 29x2.3 rear tire
Key Features
- Lightweight, versatile trail bike
- 125mm rear travel
- Two position Trail/Rail flip chip, swinglink-driven four-bar Horst link suspension with custom tuned shock.
- 148mm boost rear spacing
- Sizes Available: Medium, Large, Extra Large
Specifications
 ST FactoryView$6499.00
|  FactoryView$6499.00
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| 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 | Nukeproof Reactor 290 Carbon, 130mm 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 | Fox 36 Float, Factory Series, Kashima, Grip 2 Damper, 150mm, 44mm Offset, BOOST, Orange | Shock | Fox Float DPS, Factory Series, Kashima, 3 Position, EVOL LV, Custom 0.2 Spacer, LCL, LRL, CMF tune, 210x47.5mm, Bearing End. | Fox Float X, Factory Series, Kashima, 2 Position, EVOL LV, Custom CM+, RM, M, M+ tune, 210x50mm, Bearing End, 1x 0.2 spacer fitted. | Front Wheel | Reynolds TR309 XC Front 28h, 29", Center-Lock, 110x15mm | DT Swiss XM1700 SPLINE 30,29", 6 Bolt, 110x15mm | Rear Wheel | Reynolds TR289 XC Rear 28h, 29", Center-Lock, HG Freehub, 148x12mm | DT Swiss XM1700 SPLINE 30, 29", 6 Bolt, Shimano Microspline Driver, 148x12mm | Tires | Front: Maxxis Minion DHF, 29”x2.3 3C MaxxTerra/EXO/TR, Rear: Maxxis Agressor, 29”x2.3 MaxxTerra/EXO/TR | Front: Maxxis Assegai 29”x2.5 WT 3C MaxxTerra/EXO+/TR, Rear: Maxxis Dissector 29”x2.4 WT 3C MaxxTerra/EXO+/TR | Crankset | Shimano XT M8100 12-Speed, Hollowtech 2, 170mm, 30T, 52mm Chainline | Shimano XT M8100 12-Speed, Hollowtech 2, 170mm, 30T, 52mm Chainline | Shifter | Shimano XT M8100-R, 12-speed Rapidfire Plus, I-Spec EV | Shimano XT M8100-R, 12-speed Rapidfire Plus, I-Spec EV | Rear Deraileur | Shimano XT M8100, SGS 12-Speed, Shadow Plus | Shimano XT M8100, SGS 12-Speed, Shadow Plus | Chain | Shimano XT M8100 HG 12-speed Inc Quicklink | Shimano XT M8100 HG 12-speed Inc Quicklink | Cassette | DTS GMX12, 12-Speed, 11-50T | Shimano XT M8100-12, 12-Speed (HYPERGLIDE+), 10-51T | Chain Guide | N/A | N/A | Brakes | Hayes Dominion A4, 4 Pot Brake, Sintered Pads | Shimano XT M8120, 4 Pot Brake, Metallic Pads | Front Rotor | Hayes, 180mm | 203mm | Rear Rotor | Hayes, 180mm | 180mm | Handlebars | Nukeproof Horizon Carbon V2, 25mm Rise, 31.8mm, Width - M780mm, L800mm, XL800mm | Nukeproof Horizon V2 25mm Rise, Width - M780mm, L800mm, XL800mm | Stem | Nukeproof Horizon, 45mm, Black | Nukeproof Horizon, 45mm, Black | Saddle | Nukeproof, Black | Nukeproof, Black | Seatpost | Bikeyoke Divine Stealth with Triggy Remote lever, M:160mm drop; L/XL:185mm drop | Bikeyoke Divine Stealth with Brand-X Remote lever, M:160mm drop; L/XL:185mm drop | Headset | Nukeproof, 44-56 IITS | Nukeproof, 44-56 IITS | Grips | Nukeproof Sam Hill Signature | Nukeproof Sam Hill Signature | Bearings | Enduro Bearings | Enduro Bearings | Weight: (Size Medium) | TBD | 14.19Kgs Medium (Tubeless) |
California Proposition 65 Warning
This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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