Nukeproof Reactor 275 Alloy Frame
Nukeproof Reactor 275 Alloy Frame
Nukeproof Reactor 275 Alloy Frame
Nukeproof Reactor 275 Alloy Frame
Nukeproof Reactor 275 Alloy Frame
Nukeproof Reactor 275 Alloy Frame

Nukeproof Reactor 275 Alloy Frame

SKU: 110608776

Regular price$2,299.00
  • This product is not available in the US. Interested in it? Let us know! We want to hear about the bikes you want to ride.
I'm interested in this bike Find A Retailer

Nukeproof Reactor 275 Alloy Frame

The Nukeproof Reactor 275 Alloy Frame: One bike to do it all

A trail bike that thrives in technical terrain — both up and down. It’s the ultimate option for the rider looking for one bike to do it all.

From concept to design, the Reactor 275 Alloy is built from the ground up to be the ultimate aggressive trail bike. It’s an uncompromising build with an alloy frame and nimble 27.5-inch wheels for maximum playfulness and fun. This frame only version of the Reactor 275 Alloy comes with the RockShox Super Deluxe Ultimate RCT shock, giving the bike 140mm of travel at the rear end. The Super Deluxe Ultimate RCT is the most tunable shock RockShox has ever made. The RC2T Damper features 100% independent high speed and low speed compression adjustment so you can tune it exactly as you like.

It’s a bike built for all-day epics in backcountry terrain — where a 2,000-foot climb will inevitably lead to a 2,000-foot descent and you need a bike that’ll handle both equally well.

How it Rides

The Reactor was built from the Nukeproof staff’s desire for a quiver-killer mountain bike that climbs well and descends without compromise.

Designed to be poppy, playful and wicked fast, the Reactor’s four-bar Horst link suspension system is supportive while climbing but an absolute hooligan on the descent. Solid mid-stroke support balanced with relatively modest anti-squat gives the Reactor an active rear end that’s shockingly supportive and efficient when pedaling uphill. Anti-squat reduces as you shift down the cassette and pick up speed, making the bike come alive on descents. 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.

To optimize weight, strength and stiffness, the Reactor 275 Alloy is made of triple-butted 6061 aluminum alloy with seatstays molded from carbon fiber. We tailor the geometry based on wheel size, so this 275 version of the bike is optimized to take full advantage of the poppy and playful nature of the smaller wheels.

All Reactor frames also feature a “flip chip,” which allows you to adjust the geometry from “Trail” to “Rail” mode. Trail balances optimized geometry for 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.

Whatever you’re in to, the Reactor will do it.

Key Features

  • Aggressive trail bike
  • 140mm 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


Reactor 275 Alloy Frame

FRAMENukeproof 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, internal cable routing, ISCG 05 mount, Enduro bearings, threaded 73mm BB, Boost 148mm rear axle spacing, 3D contoured rubber frame protection.
SHOCK RockShox Super Deluxe Ultimate RCT, Custom Compression LIN, Rebound L 320 tune, 210x55mm, Bearing End, 1x bottomless token fitted
HEADSET Nukeproof, 44-56 IITS
BEARINGS Enduro Bearings
WEIGHT (SIZE MEDIUM) 3.77Kgs/8.3lbs (Medium)

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

Recently viewed