I don't remember the part number, but it's the Mugen MTX-2 wheel spacer.
Kawahara MTX-3 Al Hex Wheel Adapter already includes spacers, so one can decide if he/she should need to use it or not.
best,
Originally posted by j240z
Also, where can I get some wheel spacers? It seems it would be easier to be able to use any offset wheel.
BTW I have the Kawahara wheel hexes, if that makes a difference...?