On the RacerX SuperShock (UE10120) details page here -
http://www.unlimitedengineering.com/shocks.shtml - it's mentioned that they only run 4 shocks on a 10lbs RTR truck.
10lbs RTR is not a lot to me - I think that's what my trucks weigh without batteries and motor installed. Would I be better of running 8 shocks instead?