Nukeproof Reactor 275 Carbon Factory

Nukeproof Reactor 275 Carbon Factory

Product information


Available color
Spec Score
Price Value


The Nukeproof Reactor 275 Carbon Factory is a high-end mountain bike with impressive components. Its UD woven Carbon Fibre frame comes with internal cable routing, Enduro bearings, and 3D contoured rubber frame protection. The bike features a Fox 36 Float Factory Series fork with Kashima and Grip 2 Damper, Shimano XT M8120 brakes, and DT Swiss XM1700 SPLINE 30 wheels. It also boasts a Shimano XT M8100 rear derailleur and shifter along with Maxxis Assegai and Dissector tires. With 160mm travel front and 140mm at the rear, the Reactor 275 is a powerhouse for downhill rides. Additionally, it has a high resale value, making it a worthwhile investment for serious mountain bikers.


  • premium_carbon_frame
  • good_weight
  • top_groupset
  • top_brakes
  • premium_suspension
  • top_reviews

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srp5299 £
travel_front160 mm
travel_rear140 mm
weight14.0 kg
wheels27.5 Aluminum
groupsetShimano XT
forkFox 36 Factory
shockFox Float X
brakesShimano XT



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


Robin Weaver

The Reactor ST isn't as fast as some uphill, but it’s a proper demon when pointed back down

  1. Surefooted downhill demon; great spec at a reasonable price; good geometry and ride position
  1. Easy going but not as efficient as some uphill; only slightly lighter than the top-spec Reactor which has more travel and a burlier build

ENDURO Mountainbike Magazine

Felix Stix

The Nukeproof Reactor 290C Factory proves that the amount of travel alone says very little about the downhill capabilities of a bike: despite having just 130 mm rear travel, we would happily take the Nukeproof to some enduro races! Downhill, the Reactor is...

  1. well thought-out spec suits the intended purpose
  2. intuitive, balanced handling
  3. good suspension
  4. comfortable pedalling position for long rides
  1. climbing efficiency


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

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Nukeproof Reactor 275 Carbon, 140mm Travel, UD woven Carbon Fibre frame, internal cable routing, ISCG 05 mounts, Enduro bearings, Threaded 73mm BB, Boost 148mm rear axle spacing, 3D contoured rubber frame protection
Frame Sizes
S, M, L, XL, XXL
Frame Colors
Kraken Blue


Fox 36 Float, Factory Series, Kashima, Grip 2 Damper, 160mm, 44mm Offset, BOOST, Orange
Rear Shock
Fox Float X, Factory Series, Kashima, 2 Position, EVOL LV, Custom CM+, RM, M, M+ tune, 210x55mm, Bearing End, 1x 0.3 spacer fitted


Nukeproof Horizon, 45mm, Black
Nukeproof Horizon V2 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm
Nukeproof Sam Hill Signature
Nukeproof Horizon SL, Black


Rear Derailleur
Shimano XT M8100, SGS 12-Speed, Shadow Plus
Shift Levers
Shimano XT M8100-R, 12-speed Rapidfire Plus, I-Spec EV
Shimano XT M8100-12, 12-Speed (HYPERGLIDE+), 10-51T
Shimano XT M8100 HG 12-speed Inc Quicklink
Shimano XT M8100 12-Speed, Hollowtech 2, 170mm, 32T, 52mm Chainline
Bottom Bracket
BSA, 73mm, threaded


Front Brake
Shimano XT M8120, 4 Pot Brake, Metallic Pads
Shift Levers


Front Rim
DT Swiss XM1700 SPLINE 30,27.5", 6 Bolt, 110x15mm
Rear Rim
Front Tyre
DT Swiss XM1700 SPLINE 30,27.5", 6 Bolt, 110x15mm

Geometry Nukeproof Reactor 275 Carbon Factory

sizeReactor 275 150mm Fork (Carbon)Reactor 275 160mm Fork (Carbon)
seat_tube_length (mm)508508
head_tube_length (mm)125125
top_tube_length (mm)673674.3
chainstay_length (mm)428428
wheel_base (mm)12451249
standover (mm)735742
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 Carbon Factory

How heavy is the Bike?

The Reactor 275 Carbon Factory weights 14,00 kg. Thats roughly 30,9 pounds

What material is the frame of the Nukeproof Reactor 275 Carbon Factory?

The Nukeproof Reactor 275 Carbon Factory ist crafted with Carbon

What is the recommended price given by the manufacturer Nukeproof?

The SRP Price is our information at 5299 GBP

Where das the Brand Nukeproof is originated?

Nukeproof is a Company from Great Britain