If I get corba rs, what size tires should I run to be equal to my tire size now?

[WannaXP8]

If I end up lowering my X, I would like to know what size tires I should run on my 17s that are some what close to the same size of the stock tires on my explorer, they are the 15s.

 

[Jason_25]

Try www.4lo.com . They have a metric tire size calculator.

 

[james t]

if your stock 15's had 235/75/15's on them (like mine did) then 275/50/17's will be almost exactly the same height.