Designed and built especially for single speed bikes the park tool ss 15 single speed spanner is a forged multi purpose ride saver just the right size and length 17cm7 to take along or to wrench in the garage the ss 15 is destined to be a single speederrsquos favorite park tool ss 15 single speed spanner features redesigned now 37 lighter and even easier to bring along without cramping your style features a 15 mm socket for axle nuts and a 15 mm open end for removing