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Wolf Tooth direct mount E-bike chainring compatible with Trek TQ motors, Boost and Super Boost frames.Lightweight E-bike crankset with patented Drop-Stop® technology.Technical specifications:Mounting:Direct Mount.Use:E-bike.Compatible:Trek TQ engines.Compatible:Boost and Super Boost Framesets.Compatible:Shimano Hyperglide+ 12-speed and KMC 12-speed chains.*NOT COMPATIBLE:With other chains.Chain line:55 mm.Tooth profile:Drop-Stop ST.Weights and sprockets:30 t - 64g, 32 t - 69 g.Material:Aluminium 7075-T6.Patented Wolf Tooth Drop-Stop ST system for use with Shimano Hyperglide+ 12-speed and KMC 12-speed chains.