Sell ZTTO Jockey Wheel 12T Narrow Wide Ceramic Bearing Derailleur Pulley Aluminum Rear Derailleur Fit for Road Bike MTB 4mm 5mm 6mm Hot best price

ZTTO Bicycle Rear Derailleur Ceramic bearing 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:12T Structure: Ceramic bearing Material: aluminum alloy 7075 Color: Black Red Blue Gold Weight: about 8g Fit for 4/5/6 MM roller screw axis Apply for most of rear derailleur on the market ZTTO CERAMIC 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. POM Bearing Rings For guide pulley, we use POM bearing rings instead of steel bearing rings, POM is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability. They are also extremely light weight, that is why we can make a 7.8 grams pulley wheel. They are also resistant to water and salty environment and they will never need lubrication or getting rusty.