From concept through to design, the Kinematics, the geometry and specification; the Reactor is designed from the ground up to be the ultimate aggressive trail bike. It is at home on technical climbs, but happiest when thrashing the most technical trails you can point it at.
The Reactor frame is crafted from hydroformed triple butted 6061 aluminum. To reduce unsprung mass the seatstays on the Reactor are molded from carbon fibre. All frames are available for 27.5" or 29" wheel sizes. Each wheelsize is based on two totally different, compromise free frames. Each were designed and developed at the same time and optimized around each wheel size.
Speed or play: which do you value more? The maneuverability of 27.5" or the raw speed of a 29"?
All Reactor frames feature a flip chip to adjust the geometry from Trail to Rail model.
- Trail - As the name suggests, this setting is best suited for trail riding. It is for riders who get as much enjoyment from the climb as the descents
- Rail - The Rail setting turns the Reactor into a corner shredder, dropping the bottom bracket 6mm and slackening the head angle by half a degree. It is there to maximize the descending capabilities.
To ensure the bike could climb as well as it descends, we designed the 4 bar horst linkage to have higher levels of anti-squat for climbing gears but lower levels when you drop down the cassette. This means that the bike can behave itself on the climbs but when you get it up to speed, it turns into a trail hooligan. The combination of low anti-squat and progressive rate give ultimate small bump compliance (removes rough trail and root chatter) with good mid stroke support for cornering/pumping and end stroke progression for aggressive riding. Balanced anti-rise figures allow the Reactor some squat when braking hard, maintaining rider position and providing a good amount of pressure through the tyre to ensure traction. The Reactor is designed to reward the rider and ensure you get that stoke factor in on any ride.
Features
- Aggressive Trail Bike
- 140mm Rear Travel
- 2 Position Trail/Rail Flip Chip, Swinglink Driven 4 Bar Horst Link Suspension, with custom tuned shock.
- 148mm Boost rear spacing
- Sizes Available: Small, Medium, Large, Extra Large
Full Specs
| COMP - Bullet Grey | PRO - Rosso Red | PRO - Turmeric Yellow | Frame | |
|---|---|---|---|---|
| Frame | 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. | 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. | 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. | 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. |
| Fork | Marzocchi Bomber Z2, 150mm, 44mm Offset, BOOST, RAIL Damper, Gloss Black | RockShox Lyrik Select + Charger 2.1 RC 160mm, 46mm Offset, BOOST, Debonair, Gloss Black | RockShox Lyrik Select + Charger 3 RC2 160mm, 46mm Offset, BOOST, Debonair, Gloss Black | |
| Shock | RockShox Super Deluxe Select R, Custom Compression LIN, Rebound L 320 tune, 210x55mm, Bearing End, 1x bottomless token fitted. | RockShox Super Deluxe Select+ RT, Custom Compression LIN, Rebound L 320 tune, 210x55mm, Bearing End, 1x bottomless token fitted. | RockShox Super Deluxe Select+ RT, Custom, S/M - 0L1 LNL1 32SB C C1, L - 0L1 LNL 32SB C C1 tune, 210x55mm, Bearing End, 1x bottomless token fitted. | RockShox Super Deluxe Ultimate RCT, Custom, S/M - 0L1 LNL1 32SB C C1, L/X - 0L1 LNL 32SB C C1, 210x55mm, Bearing End, 1x bottomless token fitted. |
| Front Wheel | Sun-Ringle Duroc 35 Comp 27.5"", 15x110mm | Nukeproof Neutron V2 27.5"", Tubeless Ready, 32h, 110x15mm | Nukeproof Neutron V2 27.5"", Tubeless Ready, 32h, 110x15mm | |
| Rear Wheel | Sun-Ringle Duroc 35 Comp 27.5"", Shimano Microspline Driver, 148x12mm | Nukeproof Neutron V2 27.5"", Tubeless Ready, 32h, SRAM XD Driver with 36 points of engagement, 148x12mm | Nukeproof Neutron V2 27.5"", Tubeless Ready, 32h, SRAM XD Driver with 36 points of engagement, 148x12mm | |
| Tyres | Front: Maxxis Assegai 27.5”x2.5 WT 3C MaxxTerra/EXO+/TR, Rear: Maxxis Dissector 27.5”x2.4 WT 3C MaxxTerra/EXO+/TR | Front: Maxxis Assegai 27.5”x2.5 WT 3C MaxxTerra/EXO+/TR, Rear: Maxxis Dissector 27.5”x2.4 WT 3C MaxxTerra/EXO+/TR | Front: Maxxis Assegai 27.5”x2.5 WT 3C MaxxTerra/EXO+/TR, Rear: Maxxis Dissector 27.5”x2.4 WT 3C MaxxTerra/EXO+/TR | |
| Crankset | Race Face Ride, 12 Speed Crank, 170mm, 32T, 52mm Chainline | SRAM GX Eagle 12-Speed, 170mm, 32T, B148, DUB | SRAM GX Eagle 12-Speed, 170mm, 32T, B148, DUB | |
| Shifter | Shimano Deore M6100-IR, 12-speed Rapidfire Plus, I-Spec EV | SRAM GX Eagle 12-Speed | SRAM GX Eagle 12-Speed | |
| Rear Deraileur | Shimano Deore M6100, SGS 12-Speed, Shadow Plus | SRAM GX Eagle 12-Speed | SRAM GX Eagle 12-Speed | |
| Chain | Shimano Deore M6100 12-Speed | SRAM GX Eagle 12-Speed | SRAM GX Eagle 12-Speed | |
| Cassette | Shimano Deore M6100 12-Speed (HYPERGLIDE+), 10-51T | SRAM GX Eagle 12-Speed, CS XG1275 EAGLE 10-52T | SRAM GX Eagle 12-Speed, CS XG1275 EAGLE 10-52T | |
| Chain Guide | N/A | N/A | N/A | |
| Brakes | Shimano M6120 or SRAM DB8 | SRAM Guide RE | SRAM Guide RE | |
| Front Rotor | 203mm | SRAM Centreline, 200mm | SRAM Centreline, 200mm | |
| Rear Rotor | 180mm | SRAM Centreline, 180mm | SRAM Centreline, 180mm | |
| Handlebars | Nukeproof Neutron V2 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm | Nukeproof Horizon V2 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm | Nukeproof Horizon V2 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm | |
| Stem | Nukeproof Neutron AM, 45mm, black | Nukeproof Neutron AM, 45mm, black | Nukeproof Neutron AM, 45mm, black | |
| Saddle | Nukeproof | Nukeproof | Nukeproof | Nukeproof |
| Seatpost | Brand-X Ascend internal, 31.6mm, S:125mm drop; M:150mm drop; L:170mm drop; XL:200mm drop | Brand-X Ascend internal, 31.6mm, S:125mm drop; M:150mm drop; L: 170mm; XL:200mm drop | Brand-X Ascend internal, 31.6mm, S:125mm drop; M:150mm drop; L: 170mm; XL:200mm drop | |
| Headset | Nukeproof, 44-56 IITS | Nukeproof, 44-56 IITS | Nukeproof, 44-56 IITS | Nukeproof, 44-56 IITS |
| Grips | Nukeproof Sam Hill Signature | Nukeproof Sam Hill Signature | Nukeproof Sam Hill Signature | |
| Bearings | Enduro Bearings | Enduro Bearings | Enduro Bearings | Enduro Bearings |
| Weight: (Size Medium) | 14.84kg (Tubeless) | 14.51kg (Tubeless) | TBC | 3.77Kgs/8.3lbs (Medium) |
Geometry & Sizing
| Reactor 275 150mm Fork (Alloy) | Reactor 275 160mm Fork (Alloy) | |||||||
|---|---|---|---|---|---|---|---|---|
| Small | Medium | Large | X-Large | Small | Medium | Large | X-Large | |
| (A) Reach | 425 | 454 | 482.5 | 516 | 420.2 | 449.5 | 478 | 511.5 |
| (B) Stack | 600 | 605 | 609 | 613.5 | 603 | 608.5 | 612.5 | 617.3 |
| (C) Effective Top Tube Length | 580 | 610 | 640 | 675 | 581 | 611.2 | 641.5 | 676.3 |
| (D) Seattube Length | 381 | 420 | 458 | 508 | 381 | 420 | 458 | 508 |
| (E) Effective Seattube Angle | 75.5° (Low 75°) |
75.5° (Low 75°) |
75.5° (Low 75°) |
75.5° (Low 75°) |
75.1° (Low 74.6°) |
75.1° (Low 74.6°) |
75.1° (Low 74.6°) |
75.1° (Low 74.6°) |
| (F) Seattube Angle (Actual) | 71° (Low 70.5°) |
71° (Low 70.5°) |
71° (Low 70.5°) |
71° (Low 70.5°) |
70.6° (Low 70.1°) |
70.6° (Low 70.1°) |
70.6° (Low 70.1°) |
70.6° (Low 70.1°) |
| (G) Saddle Height at Saddle Offset | ||||||||
| (H) Saddle Offset at Saddle Height | ||||||||
| (I) Headtube Length | 110 | 115 | 120 | 125 | 110 | 115 | 120 | 125 |
| (J) Headtube Angle | 66° (Low 65.5) |
66° (Low 65.5) |
66° (Low 65.5) |
66° (Low 65.5) |
65.5° (Low 65) |
65.5° (Low 65) |
65.5° (Low 65) |
65.5° (Low 65) |
| (K) Chainstay Length | 430 | 430 | 430 | 430 | 430 | 430 | 430 | 430 |
| (L) Front Centre | 728 | 759 | 790 | 825 | 732 | 763 | 794 | 829 |
| (M) Wheelbase | 1150 | 1181 | 1212 | 1247 | 1154 | 1185 | 1216 | 1251 |
| (N) Bottom Bracket Drop | -18 (Low -24) |
-18 (Low -24) |
-18 (Low -24) |
-18 (Low -24) |
-15 (Low -21) |
-15 (Low -21) |
-15 (Low -21) |
-15 (Low -21) |
| (O) Bottom Bracket Height | 336 (Low 330) |
336 (Low 330) |
336 (Low 330) |
336 (Low 330) |
339 (Low 333) |
339 (Low 333) |
339 (Low 333) |
339 (Low 333) |
| (P) Stand Over Height | 723 (High) | 721 (High) | 722 (High) | 725 (High) | 729 (High) | 728 (High) | 729 (High) | 732 (High) |
| (Q) Fork Travel | 150 | 150 | 150 | 150 | 160 | 160 | 160 | 160 |
| (R) Trail | ||||||||
| (S) Fork Offset | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 |
| (T) Axle to Crown | 545 | 545 | 545 | 545 | 555 | 555 | 555 | 555 |
| (U) Maximum Seatpost Insert | 175 | 215 | 250 | 300 | 175 | 215 | 250 | 300 |
*All dimensions in mm unless otherwise stated
Recommended Sizing
Help
- FAQs
- Frame Spec
- Industry Reviews
- Tech Docs
- Where can I buy Nukeproof Bikes?
- Nukeproof bikes, components and apparel is sold through an authorised dealer network. Check out our dealer locator for your local local stockist or preferred online store www.nukeproof.com/dealers.
- Do your bikes come with Warranty?
- All Reactor frames come with a 5 year frame warranty (Please visit www.nukeproof.com/warranty for full info). Components will follow the component manufacturer warranty policy. Our Warranty policy applies to the original owner and processed by our authorised retail partners. To see their warranty process check: www.nukeproof.com/warranty
- Where can I demo a Nukeproof bike?
- We run numerous demo's through the year at major events and with our dealer network. Check out www.nukeproof.com/demo for when we may be near you. If this is unavailable to you, you can always request a demo through your local authorised stockist.
- What size bike do I need?
- All our products come with a size guide. This is designed as an indication of the size that may suit you. If you are still unsure speak with one of our dealers who will be happy to help you pick the right size and model for you.
- How does you bike range work?
- Our range is named based on specification level. Not every Bike Frame will have each specification level, but in order of price they run: Sport - Race - Comp - Pro - Elite- Factory/ST (Reactor Only) - RS
- Where can I buy touch up paint for my bike?
- Nukeproof have partnered up with paint specialist G-Paint to offer touch up paints for popular Nukeproof models. These can be bought direct from G-Paint's website HERE.
| Material: | Hydroformed 6061 Triple-Butted Aluminium |
|---|---|
| Fork Travel: | 150mm (RS 160mm) |
| Axle to Crown: | 545mm (RS 555mm) |
| Fork Offset: | 46mm |
| Rear Travel: | 140mm |
| Wheels Size: | 27.5" |
| Max Tyre Size: | 2.6" |
| Recommended Shock Sag (Measured seated): | 30% |
| Shock Size: | 210x55mm |
| Shock Hardware F: | 25x8mm |
| Shock Hardware R: | 30x8mm |
| Sizing: | S/M/L/XL |
| Headtube: | 44-56mm Tapered Semi-Integrated |
| Headset: | ZS44-28.6 - T2 / ZS56/40 - B8 |
| Bearings Required: | 2x (6902 2RS), 4x (6800 2RS), 4x (6901 2RS) |
| Seatpost: | 31.6mm (Internal Routing for Dropper Seatpost) |
| Seat Clamp: | 34.9mm |
| BB: | Threaded 73mm BSA |
| Rear Hub: | Boost 148x12mm |
| Rear Axle: | Sram Maxle Stealth M12x1.75 180mm (Thread Length 20mm) |
| Chain Guide: | ISCG05 |
| Max Chainring Size | 34T/32T Oval |
| Brake Mount: | 180mm Direct Post |
| Protection: | 3D Contoured Rubber Frame Protection for DT/SS/CS |