Factory source Shimano 6800 6870 9000 9070 - 100% Original Colorful Anodized Aluminum Best Bicycle Set Bike Rear Derailleur Pulley – Kactus Sports

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CNC Machined rear derailleur pulley jockey wheel for rear derailleur

Product description

*12T narrow-wide tooth guide wheel weight: 11.4g 

*Material: AL7075-T6 aluminum alloy CNC machining

* installation size: 6MM/5MM/4MM 

*outside diameter 50.3mm

*Color: Anode red, enamel, blue, gold, titanium

*Bearing: steel ball / forest / ceramic Palin 

*Application scope: All conventional transmissions

*This product is made of AL7075-T6 round bar CNC. It is finished with diamond knife and has a diamond-like metal texture. The appearance of the product is excellent. Adopting the Japanese imported steel ball lining, the rotation has no resistance, which greatly reduces the frictional resistance and improves the riding efficiency. 

Optimized narrow-wide tooth design, increasing shifting speed, decreasing friction resistance, enhancing chain stability, suppressing shifting noise.

if you hear shifting noise from a narrow-wide tooth pulley louder than that from a normal tooth pulley, it’s most likely caused by poor design of tooth angle or poor process. Just remember, noise is not good, the lower the noise the better.