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We are going to make every single effort for being excellent and excellent, and accelerate our ways for standing while in the rank of international top-grade and high-tech enterprises for 17t Bicycle Rear Derailleur Pulleys Wheel, Bike Rear Derailleur, Full Carbon Fiber Cages, Our tenet is “integrity first, quality best”. We have confidence in providing you with excellent service and ideal products. We sincerely hope we can establish win-win business cooperation with you in the future!
12/18T Oversized pulley system
Save up to 45% friction resistance, compare to 11T pulley
Ceramic bearing version saves more than 2.2 watt power on average, compare to original transmission
Full carbon fiber cage
Full 7075 aluminum alloy CNC lightweight pulley
18TSRX suitable for SRAM X1 XX1 GX NX Ceramic bearing
Ceramic bearing version hybrid ceramic bearing version NSK steel bearing version
Weight: 59g
Ceramic bearing version weighs 1.2g less.
Why replace derailleur pulley
First, replace the original pulleys with these would improve the weak stretch of the original set, and make the up and down chain tension between guide wheel and cogs much more adequate.
Second, the number of contact tooth or control tooth between chain and cogs of 17T is more during gear shifting, the more contact, the stronger the control power.
Third, after redesign the cage’s rotation curve, the distance between upper guide wheel and the cogs is improved.
Long story short, with all the features mentioned above, you would save 2.2 watts or more with each pedaling. That’s the equivalent of shaving 100g off a 10KG bike.
