2pcs MTB Rear Derailleur Jockey Wheels Steel Bearing Pulley Bike Guide

MEROCA Bicycle Rear Derailleur Jockey Wheel 11T/13T

All the results of the simulations and the experimentations indicated that the steel ball bearings' performances are very good, especially in the low load and high-speed environment.

Size:11T/13T
Material: aluminum alloy body + Steel bearings
Weight: 11T about 9 g/pc, 13T about 12 g/pc

Fit for 4/5/6 MM roller screw axis
Apply for most of rear derailleur on the market

The choose option pictures just for color reference, The exact teeth is based on the 11T/13T you choose when placing an order.

MEROCA Steel Bearing

Suitable for all cycling applications, whether it is road, MTB, or triathlon, these pulley wheels will optimize your speed rear derailleur with reduced friction and extended lifetime. Being the fastest spinning bearings on your bike, an upgrade with our high-performance pulley wheels are an effective way to save energy or ride faster.