I have a 2015 PCR kart with I believe to be OTK front hubs. there is a gap between the spacer a 10mm will not fit because I cant fit the nut at the end, and the space between measures 8.75mm. Is there any other solution other then maybe finding a way to mill the spacer? My other thought was to 3d print a spacer but wasn’t sure if plastic would hold up.
They make all different sizes. Sometimes it takes a little substitution math to get what you want. CRG makes an 8mm. You may need to take out a 10 and put in a 8 and a 5, or something similar.
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Do you have the cap/cup at the outside?