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2021 CUBE

REACTION PRO

A 27.5″ / 29″ aluminum frame hardtail crosscountry bike with upper mid-range components.
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Manufacturer Price

€1,249($1,452)
Weight28.4 lbs  
FrameAluminum
SuspensionHardtail, 100mm
ForkRockShox Judy Silver TK
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 12
GroupsetXT, Deore
BrakesShimano XT Hydraulic Disc
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
REACTION PRO
Other Crosscountry bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

28 mph

REACTION PRO

27 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The CUBE Reaction trail bike series offers a mix of performance and value, with models praised for their acceleration, climbing efficiency, and component quality. However, some reviews note a harsh ride on descents, limited mud clearance, and tyres that struggle in wet conditions. The bikes are often compared favorably in terms of value but may lack the prestige of some competitors.

Pros
  • Instant acceleration

  • Impressive spec with well-chosen components

  • Great for sprinting up short, sharp climbs

  • Fox 34 fork is decently stiff with a supple GRIP damper

  • Cracking value for the price

Cons
  • Harsh ride on descents and rough trails

  • Tyres are thin and need higher pressures, adding to a jarring ride

  • Limited mud clearance

  • Tyres struggle in wet conditions and lack cornering confidence

  • Not the most spacious compared to rivals

Key Quotes
Snappy out of the gate, the Reaction has a powerful kick
BikeRadar logoBikeRadar
It's cracking value and much more capable in the rough than the rest of the range if you like hacking about in the woods
off.road.cc logooff.road.cc
Cube has a reputation for well priced bikes – you get a decent amount of bike for your money.
Singletrack World logoSingletrack World

Feedback?

View all reviews

BikeRadar
Cube Reaction C:62 SL review

Jul 2020 · Tom Marvin

Fast reactions to pedal inputs help on climbs, but the stiff chassis affects descending capability

Highs
  • Instant acceleration

  • Impressive spec, with well-chosen components across the board

Lows
  • Harsh ride chokes descending speed and rough-trail acceleration

  • Tyres are thin and need higher pressures to prevent punctures, adding to the uncompromising ride feel

Read Review

Singletrack World
Review: 2018 Cube Reaction TM - a ready to roll package

Dec 2018 · Hannah Dobson

Cube has a reputation for well priced bikes – you get a decent amount of bike for your money. It’s a brand you’ll find in many a local bike shop,...

Read Review

off.road.cc
Cube Reaction TM review

Apr 2018

Cube's Reaction TM is a harder hitting version of their high-value aluminium Reaction hardtail range, pairing a sturdy 130mm fork up front with fat 2.6" tyres on 27.5" wheels. It's cracking value and much more capable in the rough than the rest of the range if you like hacking about in the woods, but there are harder edged weapons out there if you want to go full gonzo. Buying your first mountain bike - the complete guide to getting started First Look: 2018 Cube Stereo 140 HPC - all-new trail full suspension platform When should you replace your bicycle chain?

Read Review

Geometry
Specs
Build
Frame

Aluminium Lite, AMF, Double Butted, Internal Cable Routing, Tapered Head Tube, Flat Mount Brake, SIC Mount, FM Kickstand Mount

ColorVerde’n’green

Fork

RockShox Judy Silver TK Air, 100mm, PopLoc

Travel100mm

Spring TypeAir

Headset

CUBE FPH868, Top 1 1/8", Bottom 1 1/2", Semi-Integrated

Stem

CUBE Performance Stem SL, 31.8mm

Handlebar

CUBE Flat Race Bar, 720mm

Saddle

Natural Fit Venec Lite

Seatpost

CUBE Performance Post, 27.2mm

TypeRigid

Pedals

CUBE PP MTB

Grips

ACID React Pro

Groupset
Rear Derailleur

Shimano XT RD-M8100-SGS, ShadowPlus, 12-Speed

Crank

Shimano FC-MT611, 32T

Shifters

Shimano Deore SL-M6100-IR, Direct Attach, Rapidfire-Plus

Cassette

Shimano Deore CS-M6100, 10-51T

Chain

Shimano CN-M6100

Brakes

Shimano XT BR-M8100, Hydr. Disc Brake, PM/FM (180/160)

TypeShimano XT Hydraulic Disc

Wheels
Rims

CUBE ZX20, 32H, Disc

Front Hub

Shimano HB-M4050, QR, Centerlock

Rear Hub

Shimano FH-MT401, QR, Centerlock

Tires

Front: Schwalbe Racing Ray, Addix Performance, Kevlar, 2.25, Rear: Schwalbe Racing Ralph, Addix Performance, Kevlar, 2.25

Rider Notes
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First added August 4

Last updated July 16

Not listed for 1,781 days