Sram Unisex Adult Post Bracket Disc Brake Adapter, Black, One Size

ManoMano

Sram: SPECIFICATIONS Mounting Interface: Post mount (40mm bracket) 40P Rotor Size Increase: 40 Type (Mount Brackets): Bolt Washer Stack: Standard Material (Mount Brackets): Stainless Steel

Amazon

The Box disc brake adapter has been developed This is not a universal adapter It is not perfect for all bike frames