SHIMANO

unisex Shimano Disc Brake Adapters

Top questions answered byShopGeni

Get exact information on any specific item.

• What are the dimensions of these Shimano disc brake adapters?

  
  These adapters are listed by Rotor Size / Caliper Mount / Front or Rear / Bike Mount Tab / Mfg Part Number. For example, the 180mm / 74mm / Front/Rear / 74mm Post / SM-MA-F180P/P2 specifies the rotor size, caliper mount, bike location, mount type, and the manufacturer's part number.
• How do I know which adapter fits my bike?

  
  The adapters are described by Rotor Size, Caliper Mount, Front or Rear placement, and Bike Mount Tab type. For example, '160mm / 74mm / Front / 51mm IS' means a 160mm rotor, 74mm caliper mount, for the front of the bike, with a 51mm IS mount.
• Are there different versions of these adapters?

  
  Yes, Shimano releases new versions of their adapters periodically, so there may be duplicate fits shown across different product listings. Always double-check the specific dimensions and mount types to ensure compatibility with your bike.