Whether you're upgrading your fork to thru axle and need your 2012 Mavic Crossmax SX or XT to work with the new front end, or you want to be able to swap your Crossmax SX or XT wheelset between bikes and need to convert from quick release to 20mm thru axles, you're going to need Mavic's 20mm Adapters for SX/ST front wheels. Sturdy, precise aluminum construction ensures compatibility with all 20mm equipped forks. The adapters easily swap out, and do not require any special tools to perform the switch.