Wolf Tooth Direct Mount Chainrings for E-Bike Motors have a 55mm chainline and are compatible with all Boost and Super Boost bikes that use the EP8, E8000, and E7000 e-bike motor splines. The Drop-Stop B tooth profile is compatible with almost all 9-, 10-, 11-, and 12-speed chains � the only exception is Hyperglide+. The Drop-Stop ST tooth profile is only compatible with Hyperglide+ chains. Direct Mount Chainrings for E-Bike Motors are machined with 7075-T6 aluminum at Wolf Tooth in Minnesota, USA.Compatibility Compatible with all Boost and Super Boost bikes that use the EP8, E8000, and E7000 e-bike motors. Chain compatibility with all 9-, 10-, 11-, and 12-speed chains based on tooth profile selection. 55mm chainline. Related Products WT-1.
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