Nukeproof Reactor 275 Alloy Frame Turmeric Yellow
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow Front Non Drive Side
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow Front Drive Side
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow Back Drive Side
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow Back Non Drive Side
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow Headtube
Nukeproof Reactor 275 Alloy Mountainbike Frame Turmeric Yellow Dropouts and Brake Mount

Reactor 275 Alloy Frame


Regular price£1,899.99
VAT included. Shipping calculated at checkout.

Bike and frame supply has vastly improved since the pandemic, but pre-ordering is still essential for some models and sizes. Hope HB916 frames are made to order too, so we have updated our pandemic bike deposit policy to take the current situation into consideration.

Please note - we can only deliver complete bikes to UK Addresses.

The ETA's (estimated times of arrival) we quote are from the information provided by the manufacturers and distributors. These dates are not guaranteed, as the manufacturers are also at the mercy of component suppliers. We will tell you the same dates as the manufacturer tells us.

We only take deposits on bikes we have on order with suppliers and have confirmation that we are going to receive them. We want to make it clear that there might be issues outwith our control that will prevent us from supplying the bike you want. If that happens, we will do our best to provide an alternative.

Deposits are non-refundable, except for when an ETA date changes by a month or more. If it looks like the date might change, we will do our best to find you an alternative.

If a bike arrives earlier than expected, it will be offered to the person with the oldest outstanding deposit, then the second, and so on. We'll then offer the bike to anyone with a similar bike on order. We should point out that this is a rare occurrence!

Bikes and frames up to £3500 require a £500 deposit.
Bikes over £3500 require a £1000 deposit.

We ring-fence deposits in a separate bank account until the balance of the bike or frame is paid, then the bike or frame is delivered.

We've tried to be as honest and open about the situation as it stands and not make promises we know we are not in the position to fulfil! We have great relationships with our suppliers, and we will work with them and you to try to get you your bike as soon as possible.

If you've read this and have any questions or would like to place a deposit, please phone us on 01330 828562.

We offer free UK delivery on all bikes unless bought through a Ride To Work Scheme.

We don't currently deliver complete bikes outside the UK.

Custom-built bikes can be delivered in kit form (for you to assemble) - we can include shipping to your country in your quote.

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Sale price bikes bought though Cycle To Work schemes will have a handling fee added.

This information is intended as a guide only.

Cycle To Work is a Government Initiative to encourage cycling to work. The idea is that by cycling to work, you get fitter and healthier, and at the same time reduce congestion and improve air quality.

In simplest terms, your employer pays for the bike, and you hire it from them through salary deductions. At the end of the hire period, the employer can sell you the bike. (Until the bike is paid for, you hire it from your employer, so don't get fired).

Your employer might administer the scheme themselves, or use a third party like one of the following:

Green Commute Initiative
Cycle Solutions
My Benefits World

If your employer doesn't offer Cycle To Work as a benefit, you can send them this employer information from the Government that outlines how it all works.

For more information, click here to contact us or call 01330 828562.

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 aluminium. To reduce unsprung mass, the seatstays on the Reactor are moulded from carbon fibre. All frames are available for 27.5” or 29” wheel sizes. Each wheel size 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 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: 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 6 mm 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, Nukeproof+ 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.


Frame Hydroformed 6061 Triple-Butted Aluminium, Geometry Adjustment Flip Chip, Moulded Chainstay Protector, UDH (Universal Deraileur Hanger), , 31.6 mm Seatpost, 148x12 mm Boost Rear Axle, 180 mm Post Mount Brake Mount, 73 mm Threaded BSA BB
Rear Suspension ROCKSHOX Super Deluxe Ultimate RCT, Debonair Air Spring, 2 Position Open/Firm Lever, Adjustable HSC - LSC - Rebound 210x50
Headset Nukeproof, 44-56 IITS

Geometry & Sizing

Nukeproof Reactor 275
150/160 mm Fork
Sizes in mm S M L XL
A: Stack 600/603 605/608.5 609/612.5 613.5/617.3
B: Reach 425/420.2 454/449.5 482.5/478 516/511.5
C: Head Tube
66° (Low 65.5)/65.5° (Low 65)
D: Head Tube
110 115 120 125
E: Effective
Seat Tube Angle
75.5°(Low 75°)/75.1° (Low 74.6°)
F: Seat Tube
381 420 458 508
G: Effective
Top Tube
580/581 610/611.2 640/641.5 675/676.3
H: BB Height 336 (Low)330/339 (Low 333)
I: BB Drop -18 (Low -24)/-15 (Low -21)
J: Chainstay Length 430
K: Wheelbase 1150/1154 1181/1185 1212/1216 1247/1251
L: Standover 723/729 721/728 722/729 725/732
M: Fork Offset 46
Seatpost Diameter 31.6
Seatpost Drop 125 150 170 200
Handlebar Width 780 780 800 800
Stem Length 45
Crank Length 170
Size Rider Height
S 160 cm - 171 cm
M 170 cm - 181 cm
L 180 cm - 191 cm
XL 190 cm - 201 cm

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