Tire fit with no rub??

Hey guys, I have an 07 H3 and I want to put KMC Rockstar 20x10 rims. I wanna put on 305/50/20 Nitto Terra Grapplers but I was wondering if i will get any rub problems and if it will change my speedometer or mileage meter?
Thanks

I don't think those will rub. Your outer tire diameter should be around 32" with those numbers. 305mm = 12.0" then 50% of that is 6". Take the 20 rims and add 6" to the height times 2= 32".

However, depending on the offset and backspacing you may rub a control arm or the fender edge Also make sure they clear the caliper too! I've got 34"s on mine with no lift and the only light rub is a full lock either direction an the lugs just scrape the fender down by the mud flaps.

Ok thats good to know thanks