Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red

Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness
Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness
Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness
Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness
Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness
Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness
Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red - Start Fitness

Nukeproof Reactor 275 Pro Mountain Bike 2022 - Red


Frame Size: S
  • UK Delivery: 7-10 working days*

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    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 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 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.

    • Nukeproof Reactor 275 Alloy Frame
    • RockShox Lyrik Select + Charger 2.1 RC 160mm
    • RockShox Super Deluxe Select+ RT
    • SRAM GX Eagle 12-Speed
    • SRAM Guide RE Hydraulic Brakes
    • 140mm Rear Travel
    • 2 Position Trail/Rail Flip Chip, Swinglink Driven 4 Bar Horst Link Suspension
    • 148mm Boost rear spacing

    Product Code 819372
    Brand Nukeproof
    Gender Mens
    Model Year 2022
    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.
    Fork RockShox Lyrik Select + Charger 2.1 RC 160mm, 46mm Offset, BOOST, Debonair, Gloss Black
    Rear Shock RockShox Super Deluxe Select+ RT, Custom Compression LIN, Rebound L 320 tune, 210x55mm, Bearing End, 1x bottomless token fitted.
    Shifters SRAM GX Eagle 12-Speed
    Derailleur (Rear) SRAM GX Eagle 12-Speed
    Brakes SRAM Guide RE
    Crankset SRAM GX Eagle 12-Speed, 170mm, 32T, B148, DUB
    Cassette SRAM GX Eagle 12-Speed, CS XG1275 EAGLE 10-52T
    Chain SRAM GX Eagle 12-Speed
    Hub Front Nukeproof Neutron V2, 110x15mm
    Hub Rear Nukeproof Neutron V2, SRAM XD Driver with 36 points of engagement, 148x12mm
    Rims Nukeproof Neutron V2 27.5", Tubeless Ready, 32h
    Handlebar Nukeproof Horizon V2 25mm Rise, Width - S780mm, M780mm, L800mm, XL800mm
    Stem Nukeproof Neutron AM, 45mm, black
    Headset Nukeproof, 44-56 IITS
    Saddle Nukeproof
    Seatpost Brand-X Ascend internal, 31.6mm, S:125mm drop; M:150mm drop; L: 170mm; XL:200mm drop
    Pedal Pedals not included with this bike but can be purchase separately here
    Wheel Size 27.5 inch
    Number of Gears 12

    Ready to ride

    Every bike from Start Fitness is fully checked & assembled before despatch and will arrive, almost, ready to ride. Each bike is assembled by one of our CyTech accredited mechanics and then packed into one of our custom boxes.
    This process has a lead time of 7-10 working days. Unfortunately during peak times this may be slightly delayed. We will however, aim to despatch your bike as quickly as possible. Minimal assembly, with basic tools, is required before you can ride. Assembly tools are not usually included. Please note: Some bikes are not supplied with pedals. Manufacturers don’t know if you want flat or clipless pedals - rather than send the bike with the wrong type, they leave the choice for you to make.

    Making sure you are home

    Once fully checked and boxed, we will contact you to book a delivery date. Our bikes are despatched on a next working day service (excludes weekends & bank holidays) for UK mainland orders, or a two day service to Northern Ireland and outlying Scottish areas. European bike deliveries usually take approximately one week.  

    Taking Delivery

    Any mechanical or cosmetic issues need to be reported to us within one week of the delivery date. If you do not plan on using the bike straight away, we advise that you remove it from the box and check it over ASAP as we cannot be responsible for any reported issues (other than standard warranty issues) later than one week from the date that the bicycle was delivered.  

    First Service

    After a few weeks of riding (we recommend around 6-8 weeks, regardless of how much the bike has been used), a new bike will need a service to make final adjustments and to re-check all nuts and bolts. This is necessary as the bike goes through a ‘bedding in’ phase, after which, final adjustment may be necessary. We recommend that this is carried out by a CyTech qualified mechanic.

    It is important to have these checks carried out to prevent any avoidable problems which may not be covered by warranty and to ensure the smooth running of your bicycle. If you’re local to us, we’re able to offer this first service free of charge* at our Newcastle store (NE1 6JE). You’ll just need to call our workshop on 0191 917 3825 to book your service in, and don’t forget to bring your proof of purchase when you drop the bike off with us.

    If you’ve had the bike delivered, it will be your responsibility to ensure a first service is carried out at a trusted bike shop local to you, preferably by a Cytech certified mechanic. Start Fitness are unfortunately not able to cover any costs associated with this service if carried out by another store.

    *Please note that this complimentary check-over does not include any labour to replace worn parts or to fit new accessories. All bikes should be delivered to us in a clean and serviceable condition, or a £15 cleaning charge will be payable.  

    Bike Servicing

    Bicycles need to be serviced regularly, as a guideline we would advise on at least one full service per year and/or a standard service twice a year. If the bike is used regularly in adverse conditions, more regular servicing may be required.

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