Wheels Manufacturing SOLO-SPLINE Micro Spline Single Speed Conversion Kit - 18t For Shimano Micro Spline Hub Bodies BLK CheckoutSpec= 20x2.15 Wolf Tooth BSA 29mm/30mm Bottom

Wolf Tooth BSA 29mm/30mm Bottom Bracket

but if you need durability for very aggressive conditions go with Super Base

PFC-free skin treatment to prevent icing

100% polyester

and slightly angled hexagonal knobs on the sides

Wheels Manufacturing SOLO-SPLINE Micro Spline Single Speed Conversion Kit - 18t For Shimano Micro Spline Hub Bodies BLK CheckoutSpec= 20x2.15 Wolf Tooth BSA 29mm/30mm BottomDesigned to seamlessly transform your Shimano Micro Spline hubs into a powerful Singlespeed setup SOLO SPLINE features a clever design that utilizes a base sleeve, which easily slides onto the Micro Spline freehub body, mimicking the process of installing a cassette. Once the base sleeve is in place, you can effortlessly slide the spacers and cog over it, securing everything with a reliable lock ring 7075 aluminum carrier and cogs for durability