The Surly Front Rack is adjustable to fit from 26" to 29" wheels. Features: Tubular CroMoly rack, stainless steel and aluminum hardware Not compatible with 135mm or wider spaced forks Lower plates redesigned to add strength and increase clearance for disc calipers Pannier support area: 121 inches cubed, per side Surface finish: phosphate coated inside and out, powder coated exterior UniCrown plate no longer included, only comes with Lower and Upper plates Specifications: Rack Mount Position: High Disc Brake Compatible: Yes Platform Dimensions: 9.05 x 6.69" Material: Chromoly Steel