Nukeproof Reactor 275 Alloy Frame - Gray

Whether you're shredding your favorite local trails with your riding buddies or attacking some technical routes on your own, this full suspension mountain bike (MTB) frame is engineered for performance. It features a robust 6061 aluminum frame construction that's been put through a hydroforming and triple-butting process to ensure maximum strength and durability as you conquer your way around the mountain. Nukeproof has also equipped this model with a dependable RockShox Super Deluxe Ultimate RCT rear shock for smooth and consistent rear end suspension performance, whatever the trail conditions. Coming complete with 148x12mm Boost rear hub spacing and internal cable routing, this is an ideal choice of upgrade for handling the demands modern MTB trail riding.

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.

Triple-Butted Alloy MTB Frame

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 maneuverability 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 maximize the descending capabilities.

Suspension Design

To ensure the bike could climb as well as it descends, Nukeproof designed the four 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 tire to ensure traction. The Reactor is designed to reward the rider and ensure you get that stoke factor in on any ride.

Features:

Material: Hydroformed 6061 Triple-Butted Aluminum
Fork Travel: 160mm (Comp 150mm)
Axle to Crown: 555mm (Comp 545mm)
Fork Offset: 46mm
Rear Travel: 140mm
Wheels Size: 27.5"
Max Tire Size: 2.6"
Recommended Shock Sag (Measured seated): 30%
Shock Size: 210x55mm
Shock Hardware F: 25x8mm
Shock Hardware R: 30x8mm
Sizing Options: S/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: 34.9mm
Bottom Bracket: 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

Specification:

Frame: Nukeproof Reactor 275 Alloy, 140mm Travel, custom triple butted hydro-formed tube set for front triangle and chain stays, UD woven carbon fiber Seat stays
Internal cable routing
ISCG05 mount
Enduro bearings
Threaded 73mm BB
Boost 148mm rear axle spacing
3D contoured Rubber frame protection
Two position adjustable Flip chip system
Shock: RockShox Super Deluxe Ultimate RCT, Custom ML 320 tune, 210x55mm, Bearing End, 1x bottomless token fitted
Headset: Nukeproof, 44-56 IITS
Weight: 3.79Kgs/8.3lbs (Medium option)