Q & A
The current model Spur is using an 8mm x 30mm Top (.HWCO https://canecreek.com/product/shock-hardware-30-0mm-x-8mm-hwco/) and 8mm x 25mm Lower (.HWHW https://canecreek.com/product/shock-hardware-25-0mm-x-8mm-hwhw/) hardware axles according to Transition: https://www.transitionbikes.com/Bikes_Spur.cfm
The hardware specification will be determined by the frame manufacturer. We suggest reaching out to YT to obtain this information.