There is no chainring mounts on these cranks as they're part of the motors on ISIS ebikes

High volume casing with aggressive tread

designed for the gravity side of things and would be best suited to AM

5mm in 1mm increments

Easy Slide-Seal top opening

Fidlock Twist Bike Base Set Bottle - Transparent Black - 750ml Heavy/Bulky There is no chainring mountsThe TWIST bottle range with bike base offers an optimised ergonomic design with easy squeeze thanks to a softer material, paired with a new bottle cap featuring a high flow, self sealing and leak proof valve, plus an optional dirt cover. Delivery includes the TWIST bike base for screwing directly to the threaded inserts, making installation simple and secure. Unsure which bottle fits your frame? Find out with their cut out template. Features Delivery