Topeak DuoSpoke Wrench M7M9. The Topeak DuoSpoke wrench is a low profile, high strength steel tool that features a pair of wrenches designed to work on two different sizes of spoke nipples. This particular version works on Mavic M7 and Mavic M9 spoke nipples to adjust spoke tension and true the wheelset. Also included is a multi size aero spoke holder.
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