Wheels Manufacturing SOLO-XD XD/XDR Single Speed Conversion Kit - 18t For SRAM XD/XDR Freeubs Green CheckoutTitle=Phil Wood Bottom Bracket Cups note: the image shown says

note: the image shown says "skate elite" on the shaft

Material:  Bracket - 6061-T6 aluminum

Inboard bushing and outboard bearing are fully serviceable/rebuildable

Chainline (approximate as BB centering and cranksets vary) - 48mm on 3x cranksets and 49mm on 2x

Swapping - Very fast chainring change out with 5 small bolts and no nuts

Wheels Manufacturing SOLO-XD XD/XDR Single Speed Conversion Kit - 18t For SRAM XD/XDR Freeubs Green CheckoutTitle=Phil Wood Bottom Bracket Cups note: the image shown saysDesigned to seamlessly transform your XD XDR hubs into a powerful singlespeed setup The Solo XD features a clever design that utilizes a base sleeve, which easily slides onto the XD XDR 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 Compatible with SRAM XD