Aluminium hex issue on JRXS type-R, XXX-S

I had a wheel binding on my car few times and find out wheel axle pin got caved in to the wheel hex so deep, the wheel hex was pressing hard againt "Inner race" of My balls!

I guess this could happend to any car that use a HEX adaptor to mount a wheel

I asked this to my extended brotherhood of RCtech.net and found out "using a Serrated nut and tight em in right torque" can prevent this problem.

I remember at 360raceway I had to keep tighten a rear right wheel all the time and I have to admit I did over tight that few time.

The M4 Serrated Nuts are available from HPI (# 87270, 87269, 87267) Tamiya (42143)