ZTTO 11T 13T MTB Bicycle Rear Derailleur Jockey Wheel Steel Bearing Pulley AL7075 CNC Road Bike Guide Roller Idler 4mm 5mm 6mm

ZTTO Bicycle Rear Derailleur Pulley Jockey Wheel

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

Size:11T/13T

Structure:steel bearing

Material: aluminum alloy 7075

Color: Black, Red, Blue, green, Gold,purple,colorful

Weight: about 11g

Fit for 4/5/6 MM roller screw axis

Apply for most of rear derailleur on the market

ZTTO Steel Bearing Pulley

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.

Aluminum Pulley Wheels

Weighing only astonishing 7.8g grams, these lightweight pulley wheels are fitted with hybrid ceramic bearings, which reduce friction and feature increased lifetime. The aluminum alloy is very durable, and together with the pulley design, the set optimizes the overall performance of your derailleur. The removable design also makes the maintenance much easier.

Steel bearing

Bearings are extremely wear resistant .

Safe operation even when using low amounts lubricant, which reduces the viscous drag friction from lubricant.