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Hardtail MTB Cube Reaction Race Sram GX Eagle 12V 29'' 2018
Hardtail MTB Cube Reaction Race Sram GX Eagle 12V 29'' 2018



Hardtail MTB Cube Reaction Race Sram GX Eagle 12V 29'' 2018


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Frame size / rider height : Size guide

17 Inches / 170-180 cm


Out of stock

19 Inches / 180-190 cm


Out of stock

21 Inches / 185-195 cm


Out of stock

Size guide

Out of stock

Out of stock

Out of stock


What size do you need?

Choosing the right sized bike depends on the type of bike, your height, your riding style, and your preference. A correct fitting bike will be more comfortable, more efficient and more fun to ride

Measure yourself accurately

To get started, measure your height and use the size chart available on each product description.

What to do if you are in between bike sizes?

If you are on the edge of two different bike sizes, don't worry, you'll probably be ok on either size (rather than thinking that one size will be awful and the other will fit). Indeed, bikes are adjustable: the seatpost can slide up and down, the saddle can move backwards and forwards and you can even switch out parts like the stem for different sized ones to help the bike fit better.

Finding out whether or not you should pick a bigger or a smaller frame is sometimes as simple as personal preference, but there are a few simple ways to work out which might suit best:
  • If you’re flexible, you might prefer a shorter head tube, so the smaller size might work out better for you. You can use a longer stem to make the reach more comfortable.
  • On a bigger bike, the reach to the handlebars will be longer. This means that if you have proportionally longer arms, you might be more comfortable on a bigger frame.

Still confused? Contact us

We built the Cube 2018 Reaction Race black/blue for one thing and one thing only: to go fast. Best tie your shoes a little tighter when you climb aboard, then, because this bike will take everything that you've got and translate it into rapid forward progress. Completely reworked for 2018, we took all the best bits of the previous Reaction, made them better, and added some completely new features - like Stealth dropper post cable routing and a thru axle rear end. With a buttery smooth RockShox Judy fork, powerful Shimano Deore hydraulic disc brakes and SRAM's Eagle GX 1x12 transmission, the Reaction Race sets new standards in its class. This is a bike that feels as good out on the trail as it does on the race course, and we reckon that's a winning formula.

Main Features:

  • Triple butted 6061 aluminium frame.
  • Sram GX Eagle 1x12-Speed transmission.
  • Powerful Shimano hydraulic disc brakes.


Frame Aluminium Lite, Triple Butted, Advanced Hydroforming, Internal Cable Routing, Easy Mount Kickstand Ready, Tapered Headtube, PressFit BB
Fork RockShox Judy Silver TK Air, Tapered, 15x110 mm, 100 mm, PopLoc
Shiftlever Sram GX Eagle Trigger
Rear Derailleur Sram GX Eagle, 12-Speed
Cassette Sram XG-1275, 10-50T
Chain Sram GX Eagle
Crankset Sram Stylo Eagle, 32T, 175 mm
Bottom Bracket PressFit
Brakes Shimano Deore BR-M6000, Hydr. Disc Brake (180/160)
Wheelset Rims: CUBE EX21, 32H, Disc, Tubeless Ready / Hubs: CUBE Alloy Light
Tires Front: Schwalbe Tough Tom, Active, 2.25 / Rear: Schwalbe Rapid Rob, Active, 2.25
Handlebar CUBE Flat Race Bar, 720 mm
Grips CUBE Performance Grip
Stem CUBE Performance Stem Pro, 31.8 mm
Headset FSA Orbit I-t, Integrated, Top 1 1/8", Bottom 1 1/2"
Saddle CUBE Active 1.1
Seat Post CUBE Performance Post, 27.2 mm
Weight 12.9 kg


Frame Size 17" 19" 21" 23"
Seat Tube 420 470 515 565
Top Tube 580 600 620 640
Chain Stay 423 423 423 423
Head Tube Length 109 120 130 145
Head Tube Angle 69° 69° 69° 69°
Seat Tube Angle 74° 74° 74° 74°
Wheelbase 1084 1105 1125 1146


Gender Men
Groupset Sram GX Eagle 12V
collection 2018
decimal weight 12.90




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