Adjustable width fits 26, 27.5, or 29 inch frames with 1` to 4` tires Modular design allows use with a variety of Plus and Fat bikes from 135 - 170mm OLD Adjustable for 26`, 27.5` and 29er wheels Tubular 6061-T6 alloy construction Adjustable to fit 1` to 4` width tires Disc brake compatible Rear Black 26` thru 29` UniversalUPC/EAN/GTIN: 888571027677