Park tool spoke wrench shimano wheel systemsthe sw 145 is a forged double ended spoke wrench designed to fit select shimano wheels with 44mm and 375mm hex spoke nipples precision machined plated and vinyl dipped for comfort and long life features fits shimano 44mm and 375mm spoke nipples 44mm nipples are found at the hub 375mm are found at the rim vinyl coated precision machinedbuypark tool workshopfrom chain reaction cycles the worlds largest online bike store