Topeak Babyseat II Disc Mount Rack Used by both professional and amateur riders alike Made using high quality materials and components Tested to ensure quality and durability For 26", 27.5"(650B) & 700c wheels with disc brakes Kindly check the product details listed below for the user guide Tubular aluminum rack is disc brake compatible Fast, easy mounting of BabySeat without use of tools Solid rack top acts as a fender to deflect road spray Easy attachment of RedLigt rear light Weighs only 1.38 pounds