DMR STS Chain Tensioner and Cassette Spacer Combo Kit, Stainless Steel Silver EA Single-Speed Conversion Kits

Includes spacer kit with 16t cog, DMR's Simple Tension Seeker chain tensioner and freehub lock nut Stainless steel body provides strength and stiffness Works in conjunction with frame's derailleur hanger and hub axle Adjustable pitch PU pulley uses sealed bearings Designed to be used with geared chains Do not use with a coaster brake or fixed gear 190g