Adapter Pulley Set Roller Bicycle Metal Bearing Guide Wheels Hot-Rolled Carbon Steel Steel Bearing

Label:Yes Package: 1pc Steel Bearing, 1pc 4MM Adapter,1pc 5MM Adapter,1pcs 6MM Adapter Size:11T/13T Structure: Steel Bearing Color: Black/Red/Blue/Gold/Green/Purple/Rainbow Weight: 11T about 11.4g,13T about 13.7g Material: Aluminum Zinc Zinc Zinc Zinc Alloy 7075

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. Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item.Thanks for your understanding.