Originally Posted by Matthew_Armeni

For the SC and SL, the shims that go behind the hex are PN: TKR1230 and are only needed if you have excessive play between the hex and the bearing.http://www.teknorc.com/shop/tkr1230-...m-shims-10pcs/



I think you might be referring to the shims that you could use on the 8th scale, as they use an 8mm stub axle.