ITEM NAME:Deadly Bike Fixed Gear Bicycle Bb Thread Press-In Central Axis Ceramics Bea O6R5 Deadly Bike Fixed Gear Bicycle Bb Thread Press-In Central Axis Ceramics Bea O6R5 Name: Bicycle shaft bearing The inner ball is made of black ceramic, the friction system is low, more lubricated and more durable. Size: outer diameter 30mm* inner diameter 17mm* height 7mm Imported black pottery, low temperature sintering, higher strength, lubrication, wear resistance and longevity Color: silver Material: stainless steel + ceramic Package Content: 1* Ceramic Bearing.The inner ball is made of black ceramic, the friction system is low, more lubricated and more durable. Imported black pottery, low temperature sintering, higher strength, lubrication, wear resistance and longevity.
