Topeak Explorer Bicycle Rack with Disc Brake Mounts Used by both professional and amateur riders alike Made using high quality materials and components Tested to ensure quality and durability Fits 26", 27.5" (650B) & 700C Wheels w/ Discc Brakes Bike rack fits all mountain bike frames with disc brakes Braze-On type attachments MTX QuickTrack system compatible Made of strong and lightweight hollow 6061 T-6 aluminum 13.6 by 9.3 by 16.1 inches (L x W x H); Weight capacity is 55 pounds