• Cube Reaction GTC Eagle 27.5 Hardtail Bike 2017

      • Currently Unavailable
      • We’re very sorry but we don’t know when this item will be back in stock.

Cube Reaction GTC Eagle 27.5 Hardtail Bike

If you're looking for the ultimate in lightweight, race-bred hardtails, your search is over. The Reaction Eagle takes Cube's acclaimed carbon chassis and pairs it with SRAM's ground breaking X01 Eagle 1x12 transmission. Super-fast, clean shifts controlled from a single shifter leave you to concentrate on getting the power down to the trail. The result: Unmatched speed and control.

The 27.5" wheels offer exceptional handling while reducing rolling resistance.


Cube's engineers threw everything they know about carbon frame technology at the Reaction Eagle's chassis. That's why it's built with their stiffness-enhancing, weight-reducing Twin Mould technology and incorporates internal cable routing for cleaner looks and longer cable life.


No two ways about it - SRAM's X01 Eagle transmission sets new standards for mountain bike shifting performance.

With a single 34 tooth chainring up front and wide-ranging, closely spaced 12-speed 10-50-tooth cassette at the rear, the phenomenal gear range is on tap without frustrating, time consuming double shifts.

RockShox's reliable Reba RL fork and SRAM Level hydraulic discs with a 180mm rotor at the front round out the main components.

And Cube backed up all this phenomenal performance with a Fulcrum Red 44 wheelset shod with Schwalbe's light, grippy and fast accelerating Racing Ralph and Rocket Ron tyres.


  • Frame: GTC Twin Mould Monocoque Technology, ARG2, Tapered Headtube, Press Fit BB, X12, Integrated Cable Routing
  • Fork: RockShox Reba RL, Fast Black, Remote Lockout, QR15, Tapered, 100mm
  • Headset: FSA Orbit I-t, Integrated, Top 1 1/8", Bottom 1 1/2"
  • Stem: Cube Performance Stem Pro, 31.8mm
  • Handlebar: Cube Flat Race Bar Pro, 720mm
  • Grips: Cube Race Grip, 1-Clamp
  • Rear Derailleur: SRAM XO1 Eagle, 12-Speed
  • Shifters: SRAM XO1 Eagle Trigger
  • Brake System: SRAM Level TL, Hydraulic Disc Brake (180/160)
  • Crankset: SRAM X1 Eagle 34T, 175mm
  • Cassette: SRAM XG-1295, 10-50T
  • Chain: SRAM PC-XO1 Eagle
  • Wheelset: Fulcrum Red 66, 28/28 Spokes, 15QR/X12
  • Front Tyre: Schwalbe Rocket Ron, Kevlar, 2.25, LiteSkin
  • Rear Tyre: Schwalbe Racing Ralph, Kevlar, 2.25, LiteSkin
  • Saddle: Selle Italia SC1
  • Seat Post: Cube Prolight, 27.2mm
  • Seatclamp: Cube Varioclose, 31.8mm
  • Weight: 10.5kg

Buy Cube Bikes from Chain Reaction Cycles, the World's Largest Online Bike Store.

  • Delivery costFREE
  • Delivery toUSA
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
  • Pay by PayPal, Bank Transfer or Card


Buying Guide

  • We've got everything you need to know in our buying guide.