DT Swiss hubs work across multiple axle standards using swappable end caps that press or thread into the hub shell. These end caps convert hubs between different axle diameters and spacing configurations without requiring new hubs or complete wheel rebuilds. The press-fit design requires a bench vise and Park Tool AV-5 axle vise to remove existing end caps and install the replacements, which takes a few minutes once you understand the process.

This specific end cap kit handles 12mm thru axle installations on rear hubs running SRAM XD freehub bodies. The same end caps work across 142mm, 148mm, 157mm, 177mm, and 197mm hub spacing because DT Swiss uses consistent end cap interfaces within each axle diameter family. That means a single kit converts both standard 142mm and Boost 148mm configurations, though the end caps themselves don't alter the hub's internal spacing—142mm hubs remain 142mm and 148mm hubs remain 148mm. The kit fits DT Swiss 180, 240, 350, and 440 series hubs equipped with SRAM XD drivers, which handle 10-speed, 11-speed, and 12-speed SRAM cassettes using the XD interface.

End cap compatibility depends on several factors including hub generation, spoke configuration, and freehub body type. These caps work specifically with SRAM XD freehub versions and won't fit hubs running Shimano HG or Campagnolo drivers. If you're converting from quick release or a different thru axle diameter, confirm your hub model year and configuration before ordering since DT Swiss updated hub designs over the years and not all end caps interchange between generations.