Nukeproof Reactor 275 Carbon Mountain Bike Frame

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.

To 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.

Speed or play: which do you value more? The manoeuvrability 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 mode”.

• Trail ‚Äì 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.

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.

Please Note: Due to severe delays in the bicycle supply chain, we have been forced to make some alterations to the specification of the component parts supplied with this bicycle. As a result the specification may differ from those shown in the images. Please refer to the specification table for accurate information.

FEATURES

• Aggressive Trail Bike
• Nukeproof UD woven Carbon Fibre frame
• 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

 

	REACTOR 275 150MM FORK (CARBON)				REACTOR 275 160MM FORK (CARBON)
	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	721	725	730	737	727	732	737	744
(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

Material:	Ultra 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%
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
Max Chainring Size	34T/32T Oval
Brake Mount:	180mm Direct Post
Protection:	3D Contoured Rubber Frame Protection for DT/SS/CS