Europa-List: 4 Ply for Less PSI

[Tony Renshaw <tonyrenshaw@optusnet.com.au>]

Gidday, 
Along with the issues of wear, I am wondering if there is an argument for
using 4 ply tyres with their lower psi of 30 vs 6 ply tyres with consequent
50 psi? The difference might be whether I bounce as high, or whether I can
pump them up to the required psi with a foot or hand pump. So,
whatdoyareckon???
Reg
Tony Renshaw
Sydney Australia