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Nukeproof Reactor 275 Factory XT 27.5" Mountain Bike 2020 - Trail Full Suspension MTB

£4,899.99
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Product Description

Introducing the all new Nukeproof Reactor: an old school name with a very new school look. Although it takes its name from the original 1996 Nukeproof Reactor trail frame, a lot has changed in the last 23 years as it runs an all new trail focused platform.

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.

Frame Construction:

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”?

Adjustable Geometry:

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 maximise the descending capabilities.

Suspension Design:

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. 

Occasionally, without notice, manufacturers change product design and/or specifications.

Specification

Frame:Nukeproof Reactor 275 Carbon, 140mm Travel, UD woven Carbon Fibre front triangle/chain stays/seat stays, internal cable routing, custom tuned rear shock
Fork:Fox 36 Float Grip 2 - 150mm
Rear Shock:Fox Float DPX2 Remote
Headset:Nukeproof, 44-56 IITS
Stem:Nukeproof Horizon
Bars:Nukeproof Horizon Alloy
Front Brake:200mm Front
Rear Brake:180mm Rear
Brake Lever:XT M8100 Lever and M8120 Caliper
Front Mech:MRP AMG CS
Rear Mech:XT- M8100-SGS
Shifters:Shimano XT M8100-R, 12-speed Rapidfire Plus, I-Spec EV
Speed:12
Rims:DT SWISS M1700
Rear Hub:Boost 148x12mm
Front Tyre:Maxxis Assegai 2.5WT/Minion DHRII 2.4WT
Rear Tyre:Maxxis Minion DHRII 2.4WT
Seat Post:Rockshox Reverb Stealth
Saddle:Nukeproof Horizon
Chainset:Shimano XT M8100 Boost 32T170mm
Bottom Bracket:Threaded 73mm BSA
Chain:Shimano XT M8100 HG 12-speed Inc Quicklink
Cassette:XT- M8100 10-51T
Pedals:Basic Resin Flat

Nukeproof Reactor 275 Factory XT 27.5" Mountain Bike 2020 - Trail Full Suspension MTB Reviews

Write your own review
Overall Rating:
5
out of 5
5.00
Build Quality
5.00
Performance
5.00
Value For Money
5.00

Customer Reviews (1)

5
Whats not to like
by Iain S on 05/08/2020

phenomenal bike out on the trail. Setup is really easy with a few tweaks to the suspension for personal preference. Rides and climbs well, supple in the right places and flows nicely. Put together quickly and sent as soon as it was in stock. Excellent level of service from the whole team and one very happy customer, especially given the current climate. Cannot recommend the bike of the store enough

phenomenal bike out on the trail. Setup is really easy with a few tweaks to the suspension for personal preference. Rides and climbs well, supple in the right places and flows nicely. Put together quickly and sent as soon as it was in stock. Excellent level of service from the whole team and one very happy customer, especially given the current climate. Cannot recommend the bike of the store enough

Close review
5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5

Reactor Sizing & Geometry

Nukeproof Logo

Nukeproof Reactor 275 2020 Size Chart

Size

Height (cm)

Height (feet)

Small

155 - 170

5’1” – 5’7”

Medium

170 – 180

5’7” – 5’10”

Large

180 – 190

5’10” – 6’2”

X Large

190 - 200

6’2” – 6’6”

Nukeproof Reactor 275 2020 Geometry

Size

Small

Medium

Large

Extra Large

Seat Tube (mm)

391

420

456

509

Effective Top Tube (mm)

580

610

640

675

Head Angle

66° (Rail 65.5°)

66° (Rail 65.5°)

66° (Rail 65.5°)

66° (Rail 65.5°)

Head Tube (mm)

110

115

120

125

Effective Seat Tube Angle

75.5° (Rail 75°)

75.5° (Rail 75°)

75.5° (Rail 75°)

75.5° (Rail 75°)

Wheelbase (mm)

1150

1181

1212

1247

Chain Stay (mm)

430

430

430

430

Bottom Bracket Drop (mm)

-19° (Rail: -24°)

-19° (Rail: -24°)

-19° (Rail: -24°)

-19° (Rail: -24°)

Reach (mm)

425

454

482.5

516

Fork Travel (mm)

150

150

150

150

Fork Offset (mm)

46

46

46

46

Axle to Crown (mm)

545

545

545

545

Stack (mm)

600

605

609

613.5

 

What size frame do I need if I am between sizes? - read here

 

Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!

Full Sus MTB Guide

 

Is a full-suspension mountain bike right for me?

If you’re new to the world of cycling, we highly recommend taking a look at our bike buying guide overview or our mountain bike buying guide to help you decide what type of bike is right for your needs.

When you’re choosing a full suspension mountain bike, there are a few things to look out for which can help you to work out the quality and performance you can expect from a particular model.


Suspension travel & usage

Depending on the type of mountain bike riding you’ll be doing, you may want to have longer or shorter suspension travel on your bike:

Travel

Usage

Pros

Cons

Up to 120mm

XC

Lightweight & efficient pedalling for long-distance rides

Short travel is less capable on rough & demanding trails with large jumps & drops

120 – 150mm

Trail

Lightweight, balance of climb-friendly efficiency & rough-descent capability

More weight than a shorter travel bike & less efficient climbing. Less capable on descents than a longer travel bike

150-180mm

Enduro

Capable of covering difficult & technical downhill sections. Wide enough gear range for climbing

Heavier & significantly less efficient at climbing compared to shorter travel bikes

180mm +

Downhill

Designed for highly technical & high-speed descents, with big drops and large jumps

Heavy, and inefficient at climbing. Limited gear range means most climbs will require pushing the bike

 

 


Frame material

Full-suspension MTB frames are mostly made from either aluminium or carbon fibre, with each material having its own benefits & drawbacks.

Aluminium

Aluminium is lightweight, stiff, strong, and easy to manufacture. Manufacturers often develop their own aluminium alloys, such as ALUXX by Giant. Aluminium is found on a wide range of bikes, from entry-level & enthusiast bikes, right the way up to top-spec racing bikes.

Carbon

Carbon fibre is lighter, stiffer, stronger, and more expensive than aluminium. The most affordable carbon bikes typically use medium strength carbon fibres, while the most expensive bikes use stronger ‘high modulus’ carbon. Carbon fibre frames are found on enthusiast-level bikes, right up to high-performance bikes designed for racing.


Groupset & drivetrain

Mountain bike groupset components are typically supplied by either Shimano or SRAM, with additional manufacturers like Formula, Hope, Magura, Tektro and TRP supplying brake systems. Shimano & SRAM both produce a range of groupsets to suit different budgets. The hierarchy table here compares the different Shimano & SRAM groupsets to determine which bikes offer the best performance.

A bike’s groupset, or drivetrain, is where the biggest difference in component quality is seen. A complete groupset comprises of the following parts:

  • Chainset (aka Crankset)
  • Bottom bracket
  • Brakes
  • Brake levers
  • Shifters
  • Front & rear derailleur
  • Chain
  • Cassette
 Shimano LogoSRAM Logo
Professional
11
XTR Di2
12
XX1 AXS Eagle
AXS Eagle

12
X01 AXS Eagle
AXS Eagle
 
12
XTR
11
XX1

11
X01
 
11
XT Di2
 
Enthusiast
12
XT
 
11
SLX
10
GX
 
10
Deore
11
NX
Entry
9
Alivio
12
SX Eagle
Eagle
 
9
Acera
9-10
X9
 
9
Altus
9-10
X7
 
7
Tourney
7-10
X5

 

 


Wheel size

You’ve probably noticed that a lot of mountain bikes come in a choice of wheel size, mainly a 27.5 inch wheel (also known as a 650B wheel) or a 29inch wheel (known as a 29er). Although there are still bikes which use 26 inch wheels, these are gradually being phased out on all but the smallest bikes. The difference between these wheel sizes can have a dramatic effect on the way a bike feels and handles out on the trail.

27.5in/650b Wheels

27.5inch wheels are smaller and lighter than 29er wheels, which makes them more agile and gives the bike a more responsive & playful nature. On the other hand, the smaller wheel size rolls less efficiently than the larger size, making the bike more prone to losing speed over rough ground and making it a little slower when climbing.

29er Wheels

29er wheels have a bigger rolling radius which makes them naturally smoother over rough ground. For this reason, a 29er mountain bike often requires less suspension travel than smaller wheeled alternatives. The downsides are an increase in weight, and the larger diameter wheels generate stronger gyroscopic forces, making the bike more stable, but less agile and responsive whilst manoeuvring.

26in Wheels

26 inch wheels were once the go-to wheel size on adult mountain bikes. However, they are now typically only found on the smallest frame sizes, and on junior bikes. 26 inch wheels are lightweight and give the bike very agile handling. The downsides to 26 inch wheels are their poor rolling resistance on rough ground, and the reduced contact patch due to the smaller wheel circumference.


Suspension components

Mountain bike suspension components (i.e. the fork or rear shock absorber) are also a way to identify the quality of a bike. While Fox and RockShox are the most common manufacturers, there are a number of brands producing suspension components for mountain bikes.

Entry level full suspension mountain bikes (up to approximately £1300) may come supplied with a fork & rear shock supplied by SR Suntour, X-Fusion or RockShox. These components will allow a limited amount of adjustment, including:

  • Coil spring preload / air spring pressure adjustment
  • Lockout switch
  • Rebound damping adjustment on models towards the top of the price range.

Mid-range & enthusiast bikes (up to approximately £3500) use components from brands including Fox, RockShox and Manitou. At this level, suspension components have features like:

  • Preload adjustment / air spring pressure adjustment
  • Rebound damping adjustment
  • Lockout switch
  • Multi-position ‘mode’ switch
  • Components towards the top end of the enthusiast price range may also feature compression damping adjustment as well.

Top of the range & competition spec bikes (over £3500) also use components from Fox, RockShox & Manitou, with a few select models using parts from Ohlins. At this price, suspension components have features including:

  • Coil spring preload adjustment / air spring pressure adjustment
  • High & low speed rebound damping adjustment
  • High & low speed compression damping adjustment
  • Lockout switch
  • Multi-position 'mode' switch
  • Advanced low-friction coatings (e.g. Fox’s golden-coloured Kashima coating)

Finance

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Spend £99 or more at Tredz and you can spread the cost. Pay monthly over 6-48 months, interest free (dependent on repayment terms and amount).

1Fill your basket with everything you want from Tredz and go to the checkout.

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Delivery & Guarantee

UK Delivery Information

Please Note: Due to the current circumstances we are experiencing high demand so we may take a little longer than usual to despatch your order. Our Warehouse and Bike Build team are up and running as normal and we are taking active measures to ensure that we are following the government guidance with social distancing and additional health & safety measures have been put in place throughout the business. Please rest assured we will do everything we can to get your order to you as quickly as possible.

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

What's In The Box

What's In The Box

As cyclists ourselves, we know you will be keen to get out on your new bike as soon as possible. That's why we provide you with all the essential kit you need to get your shiny new bike rolling for the first time.

Most bikes don't come with pedals as standard so we include a set of basic pedals, free of charge with every bike we send out. We will also provide you with a pedal spanner to fit them and a 9-key trail tool, along with full instructions for setting your bike up out of the box. Each bike is sent out with a 16 point, quality control check sheet so you can be confident that your bike has been fully checked by our qualified mechanics.

What's in the box
  • Basic setup instructions
  • 16 point quality control checklist
  • Free tredz multitool
  • Free tred pedal spanner
  • Free basic pedals
  • Free drawstring kit bag
  • Free bike insurance voucher

All these items are provided at no extra charge and are packed into a Tredz drawstring bag that doubles up as a handy backpack for carrying your ride essentials.

  • Basic bike setup instructions
  • Free ‘basic’ pedals
  • Free Tredz pedal spanner
  • Free Tredz 9-key trail tool
  • Free Tredz drawstring bag
  • Free 8 weeks insurance voucher
  • 16 point, quality control check sheet

Tredz Service:

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Read our bike setup guide.

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  • 365 day 'no hassle' returns
  • Free UK delivery, on a date that suits you

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