ITEM NAME:Muqzi Ceramic Bearing Bottom Bracket Bb68-73Mm Bsa Central Axis Thread Form M4B8 ☆★ Product Details ★☆ Muqzi Ceramic Bearing Bottom Bracket Bb68-73Mm Bsa Central Axis Thread Form M4B8 The middle part is made of nylon material and cut by CNC. It avoids the use of plastic material because it is aging in harsh environment for a long time, which improves the service life. The joint is designed with two waterproof structures to improve the sealing performance and greatly reduce the acidity. The rainwater enters the bearing interior, the main product is made of aviation T6 aluminum alloy, light weight and high strength. The bearing adopts imported black ceramic hybrid bearing to improve the service life. Name: Ceramic BB hollow threaded shaft Only the five-way width of the bicycle frame is 68/73MM threaded. Can be installed Suitable models: mountain bike / road bike / dead fly / folding bicycle Please confirm the five links and thread specifications before purchase Specifications : Suitable for 5-way width of 68-73mm Thread: BC1.37 Inner hole inner diameter: 24mm(transmission reducer sleeve can be used for 22mm crank after installation) Weight: 116G (including reducer sleeve) Color:black Material:Ceramic + aluminum alloy Size:Suitable for 68-73mm central axis Package Contents: 1*Bearing Bottom Bracket 1*Reducing sleeve 2*Apron
