2020 Nukeproof Reactor 275 Expert Bike
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2020 Nukeproof Reactor 275 Expert Bike
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 Alloy Reactor features a custom triple butted hydro-formed tube set and carbon seat stays, which help reduce the overall weight of the frameset. Critically this reduces the unsprung weight; making the suspension as active as possible.
The Reactor 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”?
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.
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 275 Alloy
Material: Hydroformed 6061 Triple-Butted Aluminium (Front Triangle and Chain Stays) / UD Woven Carbon Firbre Seat Stays
Fork Travel: 150mm
Axle to Crown: 545mm
Fork Offset: 46mm
Shock Travel: 140mm
Wheels Size: 27.5″
Max Tyre Size: 2.6″
Shock Size: 210x55mm
Shock Hardware F: 25x8mm
Shock Hardware R: 30x8mm
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: 34.9mm
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 275 Alloy, 140mm Travel, custom triple butted hydro-formed tube set for front triangle and chain stays, UD woven carbon fibre Seat stays, internal cable routing, custom tuned rear shock, internal dropper seatpost cable routing, Enduro bearings, threaded bottom bracket, boost 148mm rear axle spacing, 3D contoured frame protection|
|Front Wheel||WTB Speed Terra 27.5", ST Light i30 TCS 2.0 Rim / 32h, Shimano Driver, 148x12mm|
|Rack||SRAM Centreline, 200mm Front 180mm Rear|
|Rear Wheel||WTB Speed Terra 27.5", ST Light i30 TCS 2.0 Rim / 32h, 110x15mm|
|Fork||RockShox Pike Select Charger RC 150mm, 46mm Offset, BOOST, Debonair, Diffusion Black|
|RearShock||RockShox Super Deluxe Select+ RT, Custom ML 380 tune, 210x55mm, Bearing End (Comes with 1x bottomless token fitted so you have them if needed.)|
|Headset||Nukeproof, 44-56 IITS|
|Tire||Maxxis Assegai 27.5|
|Shift Levers||SRAM NX Eagle 12-Speed|
|Rear Derailleur||SRAM NX Eagle 12-Speed|
|Cassette||SRAM NX Eagle 12-Speed, CS PG1230 EAGLE 11-50T|
|Crankset||SRAM NX Eagle 12-Speed, 170mm, 32T, B148, DUB|
|Seatpost||Brand X Ascend internal, 31.6mm, S:125mm drop; M/L:150mm drop; XL: 170mm Drop|
|Seat||Nukeproof Horizon SL, Black|
|Bar||Nukeproof Horizon 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm)|
|Stem||Nukeproof Neutron AM, 45mm, black|
|Grips||Nukeproof Sam Hill Signature|
|Brakes||SRAM Guide RE|