Nukeproof Reactor 275 Alloy Pro

Nukeproof Reactor 275 Alloy Pro

Product information


Available color
Spec Score
Price Value


The Nukeproof Reactor 275 Alloy Pro is a bike model that boasts powerful downhill capabilities, equipped with a custom triple butted hydro-formed tube set for front triangle and chain stays, UD woven carbon fiber seat stays, and internal cable routing. It features a RockShox Lyrik Select + Charger 2.1 RC 160mm fork, a RockShox Super Deluxe Select+ RT shock, and SRAM Guide RE brakes. The bike has a rear derailleur and shifter from SRAM GX Eagle 12-Speed and Nukeproof Neutron V2 27.5" Tubeless Ready wheels. The Nukeproof Reactor 275 Alloy Pro has 160mm travel front and 140mm travel rear.


  • Premium Carbon Frame
  • Good Weight in this Class
  • Good Groupset components
  • Top suspension components
  • Top reviews from the bike magazines
  • High resale value

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SRP3699 £
Travel Front160 mm
Travel Rear140 mm
Weight14.5 kg
Wheels27.5 Aluminum
Frame MaterialCarbon
GroupsetSram GX EAGLE
ForkRockShox Lyrik
ShockRockShox Super Deluxe



Tom Marvin

Riders looking to aim their front wheel down the steepest, roughest tracks will find the Reactor fits the bill

  1. Smooth suspension paves the way for high-speed fun
  2. decent kit
  3. stout front end
  1. Bit of a drag on the hills
  2. takes effort to generate speed on flatter terrain


Paul Burwell

If you’re a rider that’s focused on shredding singletrack rather than bike parks, the Nukeproof Reactor Pro 290 Alloy is a superb mid-travel trail bike

  1. Superb balance, insanely fast singletrack shredder
  1. A little lightweight for burlier riders


Jessie-May Morgan

The Reactor trail bike bike first graced singletrack last year, entering Nukeproof’s mountain bike line-up between the Scout and the Mega enduro bike. We tested the 140mm all-mountain bike on Aberdeenshire’s finest – check out our first ride review...



The Reactor range gets a spec overhaul.

Vital MTB


Trail Bike Hooligan: Nukeproof Reactor 275 RS Nukeproof's take on the short/mid-travel trail bike turns out to be very capable - and tons of fun to ride.

  1. Fun factor!
  2. Confidence-inspiring geometry
  3. Rear suspension is perfectly balanced small/big hits
  4. Lyrik Ultimate – plush and well controlled
  5. Versatile build options
  6. Flip Chip adjustability
  1. Average rear hub engagement
  2. Rims cause snakebites and had tubeless issues in test
  3. Can be a bit tricky finding the balance between front and rear suspension
  4. Could have a steeper seat tube angle
  5. Not the very best pedaling efficiency
  6. Finish is perfectible

ENDURO Mountainbike Magazine

The Nukeproof Reactor 275 RS is awesome fun to ride. In its 27.5” guise, the Reactor is best suited for a rider looking for a do-it-all trail bike who prioritises fun over flat-out charging. If you want a more planted bike with greater ability to carry...

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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, internal cable routing, ISCG 05 mount, Enduro bearings, threaded 73mm BB, Boost 148mm rear axle spacing, 3D contoured rubber frame protection.
Frame Sizes
S, M, L, XL, XXL
Frame Colors
Rosso Red


RockShox Lyrik Select + Charger 2.1 RC 160mm, 46mm Offset, BOOST, Debonair, Gloss Black
Rear Shock
RockShox Super Deluxe Select+ RT, Custom Compression LIN, Rebound L 320 tune, 210x55mm, Bearing End, 1x bottomless token fitted.


Nukeproof Neutron AM, 45mm, black
Nukeproof Horizon V2 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm
Nukeproof Sam Hill Signature


Rear Derailleur
SRAM GX Eagle 12-Speed
Shift Levers
SRAM GX Eagle 12-Speed
SRAM GX Eagle 12-Speed, CS XG1275 EAGLE 10-52T
SRAM GX Eagle 12-Speed
SRAM GX Eagle 12-Speed, 170mm, 32T, B148, DUB
Bottom Bracket
BSA, 73mm, threaded


Front Brake
Shift Levers


Front Rim
Nukeproof Neutron V2 27.5", Tubeless Ready, 32h, 110x15mm
Rear Rim
Front Tyre
Nukeproof Neutron V2 27.5", Tubeless Ready, 32h, 110x15mm

Geometry Nukeproof Reactor 275 Alloy Pro

SizeReactor 275 150mm Fork (Alloy)Reactor 275 160mm Fork (Alloy)
Seat Tube Length (mm)508508
Seat Tube Angle75.575.1
Head Tube Length (mm)125125
Head Tube Angle6665.5
Top Tube Length (mm)673674.3
Chainstay Length (mm)428428
Wheelbase (mm)12451249
Standover (mm)723730
Stack (mm)611.5615.3
Reach (mm)514509.5
BB Offset (mm)-18-15
Trail (mm)139140
Fork Rake Offset (mm)4646

Customer questions & answers

FAQ Nukeproof Reactor 275 Alloy Pro

How heavy is the Bike?

The Reactor 275 Alloy Pro weights 14,50 kg. Thats roughly 32,0 pounds

What material is the frame of the Nukeproof Reactor 275 Alloy Pro?

The Nukeproof Reactor 275 Alloy Pro ist crafted with Carbon

What is the recommended price given by the manufacturer Nukeproof?

The SRP Price is our information at 3699 GBP

Where das the Brand Nukeproof is originated?

Nukeproof is a Company from Great Britain