I assume that the stock knucks are plenty stout. I use the stock knuckles on my rc18 with alloy c hubs seems to be the tightest fit, yet remaining smooth operation. Is this a similar case here?
Later,
NiCad
Owens Racing™
CRT.5 B/L
Detta ST B/L
RC18(diggity LHO) B/L
Detta Buggies Brushed Bashers