Park tool single speed spanner ss15designed and built especially for single speed bikes the ss 15 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 speeders favourite park tool single speed spanner includes 15mm socket wrench for axle nuts 15mm open end wrench for pedals tire lever bottle opener buy park tool single speed spanner from chain reaction cycles the worlds largest online