Truing Stand Adapters for Thru-Axle Hubs. The sizes available are 12 mm, 15 mm and 20 mm. The 15 mm adapter is designed around the Shimano / Fox standard. The 12 mm and 20 mm adapters are designed around Rock Shock's Maxle standard.
These adapters are machined from 6061-T651 Aluminum billet to exacting tolerances then anodized to decrease wear. The o-rings will prevent the adapters from falling out when the wheel is removed from the truing stand. It's good to apply a light coating of grease or oil on the Adapter o-rings before installing them in the Hub. This helps in the removal of the adapters.
A word of caution these adapters are used during the wheel building process and not to adapt thru-axle wheels.