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Cube Reaction SL 29er Mountain Bike 2018 - Hardtail MTB

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Product Description

How do you improve on near-perfection? It's quite possible that the answer to that question is the Reaction SL. Light, agile and equipped to take on any trail and any competitor, it's the bike that will transform any ride into a motion-blurred celebration of speed. With our newly revamped 2018 Reaction frame and a component selection that reads like a wish-list, your legs will be screaming for you to stop long before you want to give up. Fox's plus 32 Rhythm fork, Shimano's peerless XT transmission and brakes and fast-rolling, Cube-built wheels complete a package that's ready to rock. The question is, are you?

Our engineers took their time and ticked all the boxes with the Reaction SL. Mechanically formed, double butted 6061 aluminium tubes for low weight and superb acceleration and control? Check. Fully integrated, sealed bearing headset for long life, low stack height and accurate steering? Present and correct. Internal cable routing for all cables including a future upgrade to a Stealth dropper post? Of course. Thru axle rear end for even greater torsional rigidity? Well, it'd be rude not to on a frame like this. Put it all together with our Agile Ride Geometry for the ride-by-wire nimbleness you'd expect from a Cube race bike, and it's a winning formula whether you're racing, or just riding for fun.

Specification

Frame: Aluminium Lite, Triple Butted, Advanced Hydroforming, Internal Cable Routing, Easy Mount Kickstand Ready, Tapered Headtube, PressFit BB
Fork: Fox 32 Rhythm, 2-Position Remote Lever, Tapered, 15x110mm, 100mm
Headset: FSA Orbit I-t, Integrated, Top 1 1/8", Bottom 1 1/2"
Stem: Cube Performance Stem Pro, 31.8mm
Bars: Cube Flat Race Bar, 720mm
Front Brake: XT BR-M8000, Hydraulic Disc Brake 180mm
Rear Brake: XT BR-M8000, Hydraulic Disc Brake 160mm
Front Mech: Shimano XT FD-M8020-D, Side Swing
Rear Mech: Shimano XT RD-M8000-DSGS, ShadowPlus, 11-Speed
Shifters: Shimano XT SL-M8000-I, Direct Attach
Speed: 22
Rims: Cube EX21, 32H, Disc, Tubeless Ready
Front Hub: Shimano Deore HB-M6010, 15QR, Boost
Rear Hub: Shimano Deore FH-M6010-B, 12mm, Boost
Front Tyre: Schwalbe Tough Tom, Active, 2.25
Rear Tyre: Schwalbe Rapid Rob, Active, 2.25
Seat Post: Cube Performance Post, 27.2mm
Chainset: Shimano XT FC-M8000-B2, Boost, 36x26T, 175mm
Chain: Shimano CN-HG600-11
Cassette: Shimano SLX CS-M7000, 11-42T
Pedals: Cube Aluminium MTB
Weight: 12.7kg

Occasionally without notice, manufacturers sometimes change product specifications.

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MTB Sizing

MTB Sizing

See the table below to find the right size Mountain Bike.

 

Height

Size

4’8” / 143cm

XXS

 

 

 

 

 

 

4’9” / 145cm

XXS

 

 

 

 

 

 

4’10” /  148cm

 

XS

 

 

 

 

 

4’11” / 150cm

 

XS

 

 

 

 

 

5’0” / 152cm

 

XS

 

 

 

 

 

5’1” / 155cm

 

XS

S

 

 

 

 

5’2” / 158cm

 

 

S

 

 

 

 

5’3” / 160cm

 

 

S

 

 

 

 

5’4” / 163cm

 

 

S

 

 

 

 

5’5” / 165cm

 

 

S

M

 

 

 

5’6” / 168cm

 

 

 

M

 

 

 

5’7” / 170cm

 

 

 

M

 

 

 

5’8” / 173cm

 

 

 

M

 

 

 

5’9” / 175cm

 

 

 

M

L

 

 

5’10” / 178cm

 

 

 

M

L

 

 

5’11” / 180cm

 

 

 

 

L

 

 

6’0” / 183cm

 

 

 

 

L

XL

 

6’1” / 185cm

 

 

 

 

L

XL

 

6’2” / 188cm

 

 

 

 

 

XL

 

6’3” / 191cm

 

 

 

 

 

XL

XXL

6’4” / 193cm

 

 

 

 

 

 

XXL

6’5” / 196cm

 

 

 

 

 

 

XXL

6’6” / 198cm

 

 

 

 

 

 

XXL

 

Read our bike size guide for more information on sizing.

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!

MTB Hardtail Guide

 

Is a Hardtail mountain bike right for me?

If you’re new to the cycling world, 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 hardtail 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.


Usage and suspension travel

Depending on the type of mountain bike riding you’ll be doing, you will want a bike with a longer travel or shorter travel suspension fork as well as components suited to more or less technical terrain.

Usage

Travel

Price Bracket

Pros

Cons

Recreational - riding on gravel tracks and rough roads

80 - 100mm

£200 - £500

Affordable. Low profile tyres roll quickly on smooth surfaces

Not very lightweight. Not capable on technical terrain. Components are less durable.

Cross-country / XC - more adventurous off-road riding and XC racing

100mm

£500 - £9,000

Lightweight, especially high-end carbon models. Fast climbing and accelerating. Efficient on long rides

Less capable on technical terrain than a trail hardtail

Trail - riding technical trails and trail centre loops

120mm – 150mm

£800 - £4,000

More capable on technical terrain, especially fun downhill sections

Heavier than an XC hardtail. Less efficient when climbing

Jump - Dirt jumping and skatepark riding

100mm

£500 - £1,500

Robust frames and components. Ideal for learning airborne skills

Not good for general mountain bike riding

Usage

Travel
& Price

Pros
/ Cons

Recreational - riding on gravel tracks and rough roads

80 - 100mm

£200 - £500

Affordable. Low profile tyres roll quickly on smooth surfaces

Not very lightweight. Not capable on technical terrain. Components are less durable

Cross-country / XC - more adventurous off-road riding and XC racing

100mm

£500 - £9,000

Lightweight, especially high-end carbon models. Fast climbing and accelerating. Efficient on long rides

Less capable on technical terrain than a trail hardtail

Trail - riding technical trails and trail centre loops

120mm – 150mm

£800 - £4,000

More capable on technical terrain, especially fun downhill sections

Heavier than an XC hardtail. Less efficient when climbing

Jump - Dirt jumping and skatepark riding

100mm

£500 - £1,500

Robust frames and components. Ideal for learning airborne skills

Not good for general mountain bike riding


Frame Material

Hardtail MTB frames are mostly made from aluminium alloy. High-end cross-country race bikes will have carbon fibre frames while trail hardtails and jump bikes sometimes feature steel frames.

Aluminium

Aluminium alloy frames are strong and lightweight. More expensive alloy hardtail MTBs tend to have ‘butted’ and/or formed frames which are lighter but just as strong.

Steel

Steel frames are heavier but offer a more comfortable ride, especially on higher end models, thanks to the more compliant nature of steel.

Carbon fibre

Carbon fibre composite frames offer the best of both worlds as they are strong, lightweight and comfortable. They are more expensive however and carbon hardtails start at around £1,300


Groupset and Drivetrain

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

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. 

Groupset comparison - Shimano & SRAM

What gearing options are there?

Most hardtails offer a wide range of gears for taking on a variety of terrain. It’s not all about the number of gears though as fewer gears on the front, combined with a wide range rear cassette are much easier to use, but still give you the same wide range of gears. As you go up the price points shifting gets easier with more cogs on the rear cassette and fewer front chainrings.

Entry-level hardtails will have a triple chainset with a seven (3x7) or eight (3x8) speed cassette

Mid-level hardtails tend to have a double chainset with a nine (2x9) or ten (2x10) speed cassette

High-end hardtails get a single front chain ring with a ten (1x10), eleven (1x11) or even twelve (1x12) speed cassette

Which are the best brakes?

There are three types of brakes found on most hardtail mountain bikes:

Rim brake example

Rim brakes are powerful in the dry but are significantly less powerful in the wet.

Mechanical disc brake example

Mechanical disc brakes are powerful in all weather conditions

Hydraulic disc brake example

Hydraulic disc brakes are the most powerful in all weather conditions, and also offer the best braking precision.


Wheel Size

You’ve probably noticed that 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). Another option is 27.5+ or 6Fattie wheels which bridge the gap between 27.5” and 29” wheels. The traditional MTB wheel size is 26”, but are now only found on some small sized MTBs as well as jump bikes. The difference between these wheel sizes can have a dramatic effect on the way a bike feels and handles out on the trail.

MTB wheel sizes

27.5” (650b) wheels strike the ideal balance between fast rolling and nimble handling. They are lighter than 29” wheels so are faster to accelerate. 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.

29” wheels roll fastest but are less nimble. These wheels are naturally smoother over rough ground but are heavier and slower to accelerate. Larger riders may find a better fit on a 29er, but smaller riders may find 29” wheels a little cumbersome.

27.5+ (6fattie) wheels feature wider 2.8” – 3.0” tyres and offer more cushioning (float) as well as more grip. With the extra size of the high-volume tyres, the overall wheel diameter is similar to a 29er so these wheels carry speed very well on rough ground. Plus sized wheels are ideal for riding more challenging terrain.

26” wheels are the nimblest and are great for smaller riders as well as jump bikes. While quick to accelerate these wheels are the slowest over rough ground.

Does tyre width make a difference?

Tyre width effects both speed as well as grip. Narrower tyres are faster rolling while wider ones offer more grip as well as more cushioning (float).

Recreational tyre example

1.95” - 2.0” tyres roll quickly and are good for recreational riding and light off-roading.

Trail tyre example

2.2” - 2.6” tyres are a little slower on smooth surfaces but offer much better grip in the corners and are ideal for MTB trail riding

Plus size tyre example

Plus size (6fattie) 2.8” – 3.0” tyres increase the overall diameter of the wheel so still roll quite quickly while offering a lot more grip and float. These are best for rougher terrain


Suspension Fork

The performance of suspension forks varies a lot. Forks on higher end bikes tend to offer more control and are more adjustable. Look for Fox, RockShox or Manitou forks with adjustable rebound and compression damping for the best performance on technical trails. The performance level you require will depend on what type of riding you want to do. 

For recreational riding on roads and gravel tracks, you won’t need a high-performance fork. A lockout feature can be useful for more efficient climbing on roads and smoother tracks. Air sprung forks are lighter than coil sprung forks.

For cross cross-country mountain biking lightweight air sprung forks are best. Adjustable rebound damping is essential for serious off-roading and a remote lockout switch will allow you to quickly firm up the suspension when climbing.

Trail hardtails feature longer travel suspension forks for riding on rougher terrain. Adjustable rebound damping is essential for control on challenging trails. Lockout is less important on these bikes as they are catering for riders who like the downs more than the ups. Adjustable compression damping is useful as it can help you achieve optimum performance levels. Thru-axles and tapered steerer tubes improve steering control.

Suspension fork in action

Finance

How do I apply for finance?

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.

2During checkout, select the finance option you want as your method of payment.

3You will be sent to our finance provider's secure server to complete your application.

4Finance providers PayPal & V12 will use the information provided to make a decision and complete checkout if you are approved.

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Representative example: If total purchase price is £1,399.00 with a deposit of £139.90 (10%) and your selected term is 36 months Classic Credit (15.9% APR fixed), you would pay £43.55 per month. Total charge for credit will be £308.70 and total amount repayable is £1567.80, subject to terms and status.

Delivery & Guarantee

UK Delivery Information

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland 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:

Tredz bikes are fully built & set up to ride
Read our bike setup guide.

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  • 0% APR finance available on any basket over £99
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  • 365 day 'no hassle' returns
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