说明

• ZTTO 11T/13T Bicycle Rear Derailleur Steel Bearing Pulley Jockey Wheel Size:11T/13T Structure: Steel bearing Material: aluminum alloy 7075 Color: Black/Red/Blue/Gold/Green/Purple Weight: 11T about 11 13T about 13 Fit for 4/5/6 MM roller screw axis Apply for many of rear derailleur on the market Suitable for all biking applications, whether it's road, MTB, or triathlon, those pulley wheels will optimize your velocity rear derailleur with lowered friction and extended lifetime Being the quickest spinning bearings in your bike, an upgrade with our high-performance pulley wheels are a great way to save lots of calories or experience faster Aluminum Pulley Wheels These lightweight pulley wheels are fitted with hybrid steel bearings, which minimize friction and feature increased lifetime The aluminum alloy is very durable, and together with the pulley design, the set optimizes the final functionality of your derailleur The detachable design also makes the maintenance much easier Weight: 11T about 11, 13T about thirteen

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