The Boost Spacer can be of great help if you have 2 or more bikes that have 15mm through axle systems and you need to transport 15 x 100 mm and 15 x 110 mm bikes without changing the fork mount on your bike rack! Simply insert your skewer through your fork and the 15mm fork mount, then when the bike already has a fork mount support, place the spacer between the end of the fork mount and the fork, then push the skewer through and screw it tightly.

https://youtu.be/tIrDMTF1hBQhttps://youtu.be/EwG86cbgPZs