China OEM Al7075 Jockey Wheel Pairs Pulley - 17TSR Oversized pulley wheel System – Kactus Sports

17TSR Carbon Fiber Bike Rear Derailleur Pulleys Jockey Wheel Ceramic Bearing Ultralight Bicycle

Product description

*12/17T super large size guide wheel set system

*Saves 45% chain friction resistance compared to 11T guide wheels”

*Ceramic bearing version saves more than 2.2 watts of average power compared to the original transmission system

*Full carbon fiber guide arm

*Full 7075 aluminum alloy CNC cutting lightweight guide wheel and TC4 titanium alloy spindle

*17TSR suitable for SRAM RIVAL FORCE RED

*Ceramic Bearing Version Hybrid Ceramic Bearing Version NSK Steel Bearing Version

*Weight: 63 grams

*The ceramic bearing version is 1.2 grams lighter than the steel bearing version

Product Information

Why replace derailleur pulley wheel

Firstly, porous spring position limit could adjust back tension largely, improve the weakness of original weak stretch, and make the up and down chain tension between guide wheel and cogs much more adequately.

Secondly, the contact tooth number or control tooth number between chain and cogs of rear derailleur 17T is more during gear shifting, it just like to pinch the middle and two sides of some sticks, the larger the control lever, the stronger the control power.

Lastly, after redesign the cage’s rotation curve, the distance between upper guide wheel and the cogs is improved.

Installation steps