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All-in-one Rex 2 Inpower Now 35% Cheaper [Ptx0v1YO]

$50.99 $163.99 -69%

The INpower REX 2.1 single chainring 1x cranks place power meter technology inside the crank axle where is protected it from loose rocks and other shocks, crashes, and outside contaminants like mud, sand, and clay. If you know your Optimum Chainring

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The INpower REX 2.1 single chainring 1x cranks place power meter technology inside the crank axle where is protected it from loose rocks and other shocks, crashes, and outside contaminants like mud, sand, and clay. If you know your Optimum Chainring Angle, which you can find with INpower's TORQUE 360 and OCA pedal analysis, you can dial in your oval QX1 rings to your advantage. Forged and CNC-machined in Spain from 7075 aluminum alloy, INpower REX 2.1 for MTB features unprecedented data sampling technology, which takes into account abrupt changes in terrain like jumps and drops to accurately measure your power output.

Characteristics:

  • Spider: 76 BCD
  • Sizes: 170/172.5/175mm
  • Battery specifications: AA 1.5 V
  • Estimated battery life: 300 hours riding time
  • Water resistance: IPX7
  • Strain gauges: 4 gauges in the axle
  • Wireless technology: ANT+™ 2.4 Ghz
  • Weight without batteries: 566g
  • Data transmitted: power, cadence, TORQUE 360, OCA, torque effectiveness (left side), pedal smoothness (left side)
  • Head unit: ANT+™ compatible head units http://www.thisisant.com/directory
  • Analysis Software: Trainingpeaks.com/ROTOR
  • Crank Software: ROTOR INpower User Software
  • Q-Factor: 163 mm
  • Chainline: 50.6 mm
  • Material: 7075-T6 forged and CNC-machined aluminum alloy
  • Compatibility: bottom brackets BSA, BB89, BB92, BB30, PF30, BBRight, Cannondale F-Si Ai (spider sold separately), oval and round chainrings,76BCD, 9,10 and 11 speed 

INpower User Manual - English

All other INpower downloads can be seen here

What Our Customers Say

January 12, 2026

Absolutely no complaints!

This product is a superb tool. It's a fantastic value for the money.

- Chaya U..

January 12, 2026

Absolutely no complaints!

The build quality is excellent, and it's very intuitive to use.

- Sevyn K..

January 12, 2026

Absolutely no complaints!

It's a very elegant solution. I'm thoroughly impressed.

- Delilah G..

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