From concept to kinematics, geometry to spec, the Nukeproof Reactor was built from the ground up to be the ultimate aggressive trail bike. It climbs with precision but truly comes alive when you’re charging technical trails.
Constructed from a hydroformed and butted 6061 T6 aluminium alloy, with carbon fibre seat stays to reduce unsprung mass and optimise lateral stiffness. The Reactor delivers the perfect blend of low weight, strength, and stiffness.
Made for long days in the saddle, it’s your go-anywhere trail weapon—ready for epic adventures where a 1,000m climb leads to a 1,000m descent. Whatever the trail throws at you, the Reactor 290 Alloy is built to take it on.
| Item number | SBIREANKP002 |
| Brand | Nukeproof |
| Model | Reactor Alloy Pro 290 / 297 |
| Design code | REA01As |
| Size | M |
| Range | Trail/All-Mountain |
| Fork | Rockshox Lyric Select+, Charger 3.1 RC2, Boost 15x110, Debonair+, 160mm travel |
| Material | Aluminium |
| Groupset | Sram Eagle 90 |
| Crank | Sram Eagle 90, 12-speed, 165mm, 30T, B148, DUB |
| Cassette | Sram XS-1270 T-Type 10-52 |
| Electric bike | No |
| Brake Type | Post Mount |
| Front Brake | Sram Maven, 4 piston, mineral oil, steel backed organic pads |
| Rear Brake | Sram Maven, 4 piston, mineral oil, steel backed organic pads |
| Rear Derailleur | Sram Eagle 90 |
| Handlebar | Nukeproof Horizon V2, 31.8mm, 25mm Rise |
| Stem | Nukeproof Horizon, 45mm, Black |
| Saddle | Nukeproof Horizon SL |
| Wheelset | DT Swiss M1900 Spline, 29", 370LN hubs, 30mm inner width |
| Outer Tyre | Schwalbe Magic Mary/Nobby Nic Super Trail, TLE, 29x2,4" |
| EAN | 5400928704564 |
| Pedals | Not included ** |
| Condition of use |
New |
| Warranty |
Lifetime, transferable warranty after registration within 30 days after purchase, with required annual servicing at an authorized dealer. |
* Prices, colors and specifications are subject to change without prior notice
** The images used are only for illustrative purposes. They can show options that are different from the options chosen by you and so are not legally binding.
| Frame | Nukeproof Reactor 290 Alloy, 140mm Travel, custom triple butted hydro-formed tube set, internal cable routing, ISCG 05 mount, Threaded 73mm BB, Boost 148mm rear axle spacing |
| Fork | RockShox Pike Select +, Charger 3.1 RC2, 29" Boost 15x110mm Maxle Stealth, 150mm, 44mm Offset |
| Shock | RockShox Deluxe Select+ Air, 210x52.5mm, Custom Tuned |
| Drivetrain | SRAM Eagle 90, 12-Speed, DUB, 170mm, 32T T-Type |
| Brakes | SRAM Level Silver Stealth, Post Mount, 180/160mm rotors |
| Wheels | Nukeproof Neutron V2. F&R: 29", 15x110mm / 148x12mm Boost, HG Freehub |
| Tyres | F: Schwalbe Nobby Nic 29x2.35" Performance TLE, R: Schwalbe Rocket Ron 29x2.25" Performance TLE |
| Seatpost | TranzX YS108 Dropper, 120mm (S), 150mm (M), 170mm (L), 200mm (XL/XXL) |
| Handlebar | Nukeproof Neutron V2, 20mm Rise, 760mm width |
| Stem | Nukeproof Horizon, 50mm |
| Grips | Nukeproof Horizon Lock-on |
| Saddle | Nukeproof Horizon |
| Weight | Approximately 14.6kg (size Large, without pedals) |
Specification data sourced from nukeproof.com. Contact us to confirm exact build before purchase.
All measurements in mm unless stated. Angles in degrees.
| Measurement | SMALL | MEDIUM | LARGE | X-LARGE | XX-LARGE | |
|---|---|---|---|---|---|---|
| A | Reach | 420 | 440 | 460 | 480 | 500 |
| B | Stack | 614.35 | 614.35 | 627.44 | 640.53 | 653.63 |
| C | Eff. top tube | 555.8 | 576.3 | 592.67 | 614.36 | 635.95 |
| D | Seat tube | 390 | 415 | 440 | 465 | 490 |
| E | Eff. seat angle | 77.5° | 77.5° | 78° | 78° | 78° |
| F | Actual seat angle | 73° | 73° | 73° | 73° | 73° |
| G | Saddle height | 650 | 700 | 750 | 800 | 850 |
| H | Saddle offset | 132.08 | 147.98 | 155.6 | 170.58 | 186.0 |
| I | Head tube length | 100 | 100 | 110 | 120 | 130 |
| J | Head angle | 65° | 65° | 65° | 65° | 65° |
| K | Chainstay | 430 | 430 | 430 | 435 | 435 |
| L | Front centre | 742.47 | 763.47 | 787.22 | 811.03 | 834.77 |
| M | Wheelbase | 1172.47 | 1193.47 | 1217.22 | 1246.03 | 1269.77 |
| N | BB drop | 30/10 | 30/10 | 30/10 | 30 | 30 |
| O | BB height | 345 | 345 | 345 | 345 | 345 |
| P | Standover | 718.51 | 717.28 | 717.77 | 718.97 | 724.77 |
| Q | Fork travel | 150 | 150 | 150 | 150 | 150 |
| R | Trail | 118.77 | 118.77 | 118.77 | 118.77 | 118.77 |
| S | Fork offset | 44 | 44 | 44 | 44 | 44 |
| T | Axle to crown | 567 | 567 | 567 | 567 | 567 |
| U | Max seatpost insert | 216 | 245 | 270 | 291 | 320 |
Source: nukeproof.com — data auto-refreshes in the background.
Not sure on size? Call us on 01202 028162 — our mechanics can talk you through it based on your height, riding style and inseam.
These are Nukeproof's recommended height ranges. If you're between sizes, riding style matters — aggressive enduro riders often prefer to size up for stability; trail riders may prefer to size down for agility. When in doubt, ask us — we ride these bikes ourselves.
Don't let the price tag stop you. We offer multiple ways to make your next bike more affordable.
Buy your bike tax-free through your employer. Save up to 47% depending on your tax bracket — on a £3999 bike that's a significant saving.
Check eligibility →Spread the cost over 12, 24 or 36 months with no added interest. On this bike that's from ~£111/month over 36 months.
Apply online →Not sure which scheme suits you? Call us on 01202 028162 and we'll walk you through the options — no pressure, just honest advice.
Get in touch →Finance subject to status. Cycle to Work savings vary by tax band and employer scheme. Wheelie Bike Shop is not a financial adviser. Representative example available on request.
Rider Owned & Operated
Every Nukeproof we sell has been chosen because we believe in it. Our team rides the Mega, the Reactor, and the Giga on local trails. When you ask us which bike to buy, you're getting a real answer from someone who's actually ridden it.
Talk to our teamVerified reviews from riders who bought from Wheelie Bike Shop
Real reviews from real customers — verified on Google and Trustpilot
Bought the Nukeproof Mega from Wheelie and the service was exceptional. Bike arrived perfectly built and ready to ride. The team really know their stuff.
Couldn't fault the experience. Great price, fast delivery, and the bike was impeccably set up. Would 100% buy from Wheelie again.
Really helpful team who helped me choose the right size. Came in for a test ride and bought the same day. The workshop setup is top notch.
Why buy from us?
Every bike assembled and checked by our mechanics. It arrives ready to ride.
We ride what we sell. Genuine advice — not a sales script.
Visit our Dorset showroom and ride before you commit.
Bikes delivered fully built in protective packaging, nationwide.
Bring it back after 8 weeks — we'll check and adjust everything.
From concept to kinematics, geometry to spec, the Nukeproof Reactor was built from the ground up to be the ultimate aggressive trail bike. It climbs with precision but truly comes alive when you’re charging technical trails.
Constructed from a hydroformed and butted 6061 T6 aluminium alloy, with carbon fibre seat stays to reduce unsprung mass and optimise lateral stiffness. The Reactor delivers the perfect blend of low weight, strength, and stiffness.
Made for long days in the saddle, it’s your go-anywhere trail weapon—ready for epic adventures where a 1,000m climb leads to a 1,000m descent. Whatever the trail throws at you, the Reactor 290 Alloy is built to take it on.
| Item number | SBIREANKP002 |
| Brand | Nukeproof |
| Model | Reactor Alloy Pro 290 / 297 |
| Design code | REA01As |
| Size | M |
| Range | Trail/All-Mountain |
| Fork | Rockshox Lyric Select+, Charger 3.1 RC2, Boost 15x110, Debonair+, 160mm travel |
| Material | Aluminium |
| Groupset | Sram Eagle 90 |
| Crank | Sram Eagle 90, 12-speed, 165mm, 30T, B148, DUB |
| Cassette | Sram XS-1270 T-Type 10-52 |
| Electric bike | No |
| Brake Type | Post Mount |
| Front Brake | Sram Maven, 4 piston, mineral oil, steel backed organic pads |
| Rear Brake | Sram Maven, 4 piston, mineral oil, steel backed organic pads |
| Rear Derailleur | Sram Eagle 90 |
| Handlebar | Nukeproof Horizon V2, 31.8mm, 25mm Rise |
| Stem | Nukeproof Horizon, 45mm, Black |
| Saddle | Nukeproof Horizon SL |
| Wheelset | DT Swiss M1900 Spline, 29", 370LN hubs, 30mm inner width |
| Outer Tyre | Schwalbe Magic Mary/Nobby Nic Super Trail, TLE, 29x2,4" |
| EAN | 5400928704564 |
| Pedals | Not included ** |
| Condition of use |
New |
| Warranty |
Lifetime, transferable warranty after registration within 30 days after purchase, with required annual servicing at an authorized dealer. |
* Prices, colors and specifications are subject to change without prior notice
** The images used are only for illustrative purposes. They can show options that are different from the options chosen by you and so are not legally binding.
Colour
Size
