Adapter for Bike Rack Mono / Duo. This adapter is for bikes with Thru Axle systems.
To messure wich Adapter you shuld have:
Messure the diameter of the "Thru-Axle" bolt. This should be 9, 12, 15 or 20mm.
Messure "Over locknut dimension". Inside - inside of the frame / fork. This should be 100 or 110mm.