Any brand axle should work so long as it is the same diameter. I believe the Yokomo uses the standard 1/4" axle that just about all pan cars use. So you could use an IRS, AE, CRC, or any number of other brands. Different brands have slightly different pod widths and off-sets so you will probably need to shim one or both sides to get proper spacing. Probably the safest bet would be the IRS axle and hubs.
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