Nukeproof reactor 275 carbon mountain bike frameready to rip up the trails, the nukeproof reactor 275 carbon frame combines a tough, light and responsive ud carbon fibre frame with a fox float dpx2 factory series kashima rear shock. Ideal for riding the roughest terrains in the mountain range, this frame provides agile handling, stable reactions and a dependable performance whether your climbing or descending.frame constructionto optimise the weight, strength and stiffness, the reactor carbon frame features a full ud woven carbon fibre frameset including chain and seat stays. It is available for 27.5” or 29” wheel sizes. These are two totally different, compromise free frames that were designed and developed at the same time. Each frame is simply tailored around each wheel size.the reactor is available for 27.5” or 29” wheel sizes. These are two totally different, compromise free frames that were designed and developed at the same time. Each frame is simply tailored around each wheel size. Speed or play which do you value more? The manoeuvrability of 27.5” or the raw speed of a 29”? Adjustable geometryall reactor frames feature a “flip chip” to adjust the geometry from “trail” to “rail mode”. 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 maximise the descending capabilities.suspension designto 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 frame nukeproof reactor 275 carbon, 140mm travel, ud woven carbon fibre frame internal cable routing iscg05 mount enduro bearings threaded 73mm bb boost 148mm rear axle spacing 3d contoured rubber frame protection 2 position adjustable flip chip system shock fox float dpx2, factory series, kashima, 3 position, evol lv, custom cl, drl, rezi a f f tune, 210x55mm, bearing end, 1x 0.3 spacer fitted. Short id d6td headset nukeproof, 44 56 iits weight 3.6kgs 7.9lbs mediumkey specifications materialultra strong t700 800 monocoque carbon fibre 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% 16.5mm 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 36.4mm bb threaded 73mm bsa rear hub boost 148x12mm rear axle sram maxle stealth m12x1.75 180mm thread length 20mm chain guide iscg05 brake mount 180mm direct post protection 3d contoured rubber frame protection for dt ss csbuy nukeproof frames forks from chain reaction cycles, the world's largest online bike store.