Bicicletta da montagna Shun'an 6/7/8/9/10/11/12 da corsa su strada, cambio a 30 velocità, catena

The weight of one box of chains is 280g 50 pieces per box, size 26CM*35CM*13CM 6/7/8/9/10/11/12 Speed Special Chain Mountain Bike Bicycle Accessories Variable Speed Chain Cycling Supplies Accessories The model number inside the speed chain represents an economical option that is a good upgrade and replacement for 6/7/8/9/10/11/12 speed systems Chain 6/7/8/9/10/11/12 speed SP reinforced wear resistance, enhancing wear performance; unique riveting method, improving chain tensile strength Z-type bridge outer piece enhances shifting performance; silent function with low noise design; outer piece chamfering for improved handling performance Inner piece chamfer type; bushing-less design for smooth transmission Note: When there is no Shun'an available, the default will be to send Shuimao's chain. The quality is the same; it's just that the box has the SHUIMAO label printed on it; everything else is identical