The New Nukeproof Reactor takes its name from the original 1996 trail hardtail. However, a lot has changed in the last 20 years and it does not bear much in common with its predecessor today.
From the concept, through the frame design, the kinematics and the geometry; the New Reactor has been designed from the ground up to be the ultimate aggressive trail bike. It is at home anywhere on the hills but is happiest when being thrashed through the most technical lines you can point it at.
Frame Construction: 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”? 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.
Frame:Hydroformed 6061 Triple-Butted Aluminium (Front Triangle and Chain Stays) / UD Woven Carbon Fibre Seat Stays
Axle to Crown:554mm
Max Tyre Size:2.6"
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)
BB:Threaded 73mm BSA
Rear Hub:Boost 148x12mm
Rear Axle:Sram Maxle Stealth M12x1.75 180mm
Brake Mount:80mm Direct Post