Requirements:
Bike dropout must have large solid flat surface or with dropout eyelet or pannier holes.
145mm kit: measures 10" straight line from brake post/boss to the rear hub axle center.
170mm kit: measures 11" or longer or 10" with additional acute angle tilt between the adapter plate and adjuster bar. Installation photo available upon request via email.
Does NOT work for Specialized FSR, Trek Y, GT-i2K, and most Klein bikes and bikes with Breezer dropout.