Avid disc brake adaptor hardwareavid brake spares are high quality replacement parts for your mtb brakes since 1991 avid has been working hard to bring you the industrys most dramatic improvements and make enhancements so sweet its hard to imagine riding without them avid represents component engineering at its best features185mm51mm is74mmfork pmrotor size 185mmcaliper fit 51mm isbike mount fit 74mmframe or fork fit fork post mount0 is front 160rear 140 ss bolts20 is f