Available in two versions

Simply the best way to convert your PF30 frame to accept standard 24mm or GXP style stepped 24/22mm axle cranks

Pros: This simple device can encourage your kids or other non-riders to get out there and up those hills

spider arm design and is compatible with 9 speed drivetrains

Compatible with Shimano Mountain Hollowtech II and Race Face X-Type

Formula Monolithic Disc Brake Rotor - 160mm - 6 Bolt - Standard - 1.8mm to 1.9mm Do Not Ship Internationally Available in two versionsFormula put 3 years of development into these rotors to eventually produce a design that combines the best of all the "must have" features in a disc: extreme lateral stiffness that guarantees impact resistance by protecting the disk from unwanted damage; reduced unwanted noise caused by friction; a special anti noise design which reduces the risk of resonance and vibrations; reduced pad wear. Specs: Compatible with all Formula disc brakes Material: