Nukeproof Reactor 275 Carbon Elite

Nukeproof Reactor 275 Carbon Elite

Product information


Available color
Spec Score
Price Value


The Nukeproof Reactor 275 Carbon Elite is a high-end mountain bike with powerful downhill capabilities. It features a UD woven carbon fibre frame, internal cable routing, ISCG 05 mounts, and Enduro bearings. The bike has 160mm of travel in the front, 140mm in the rear, and comes with a Fox Float X shock and Fox 36 Float fork. It also has Shimano SLX M7120 4 Pot Brakes, a Shimano SLX M7100 rear derailleur, and Nukeproof Horizon V2 wheels. The bike has a Maxxis Assegai 27.5"x2.5 WT 3C MaxxTerra/EXO+/TR front tire and a Maxxis Dissector 27.5"x2.4 WT 3C MaxxTerra/EXO+/TR rear tire.


  • premium_carbon_frame
  • top_groupset
  • top_brakes
  • good_suspension
  • top_reviews
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srp4399 £
travel_front160 mm
travel_rear140 mm
wheels27.5 Aluminum
groupsetShimano SLX
forkFox 36
shockFox Float X
brakesShimano SLX



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


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.


Alan Muldoon

If you crave ultimate performance, and personal service from a local shop, the Nukeproof Reactor 290c Elite is the bike to get

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

Finlay Anderson

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 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
Nukeproof Factory Yellow


Fox 36 Float, Performance Elite Series, Grip 2 Damper, 160mm, 44mm Offset, BOOST, Black
Rear Shock
Fox Float X, Performance Elite Series, 2 Position, LV EVOL, 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


Rear Derailleur
Shimano SLX M7100, SGS 12-Speed, Shadow Plus
Shift Levers
Shimano SLX M7100-IR, 12-speed Rapidfire Plus, I-Spec EV
Shimano SLX M7100-12, 12-Speed (HYPERGLIDE+), 10-51T
Shimano SLX M7100 HG 12-speed Inc Quicklink
Shimano SLX M7100 12-Speed, Hollowtech 2, 170mm, 32T, 52mm Chainline
Bottom Bracket
BSA, 73mm, threaded


Front Brake
Shimano SLX M7120, 4 Pot Brake, Metallic Pads
Shift Levers


Front Rim
Nukeproof Horizon V2 27.5", 6 Bolt, 110x15mm
Rear Rim
Front Tyre
Nukeproof Horizon V2 27.5", 6 Bolt, 110x15mm

Geometry Nukeproof Reactor 275 Carbon Elite

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 Elite

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

The Nukeproof Reactor 275 Carbon Elite ist crafted with Carbon

What is the recommended price given by the manufacturer Nukeproof?

The SRP Price is our information at 4399 GBP

Where das the Brand Nukeproof is originated?

Nukeproof is a Company from Great Britain