Because I have a set in the garage loft but before I go changing tyres on them I'd like to know the impressions of anybody who may have already done it ! As far as 170 on 5.5" on a 4V... I bet that turns in real quick with lots of grip! I've heard of 5.75" and 180, but 170? Did you also install a 4.5" rim? I sure hope it works for you. Anyway, if anybody has a 6" please let me know your impressions.