Designed exclusively for 24" and 26" wheeled FatBikes with disc brakes and 190mm rear wheel spacing Lowered pannier specific side bars allow for more space on top of the rack and for heavy duty Touring use Wide clearance posts space rack away from disc brake caliper Fits frames with threaded rack mounting holes on the dropouts Tubular 6061 aluminum with QuickTrack plate which accepts all MTX trunk bags 55lbs weight capacity Not compatible with frames with asymmetrical chainstays