O.K., so I'm looking to do some rimtire swapping. Using the stock chrome clads with the stock Wrangler 275/70R/17s for winter. Grabbed a set of aluminums(in the pics) for summer and would like to go a bigger/taller on the new set. What the heck am I looking for.... 285s or would it be 75R for height???

 

are you asking what the numbs mean, your actually right on both ends.

275 mm wide. 70 = 70% of tire width is length of sidewall.
If you want some badass tires go with low 300s and 50-60s
So going with a wider tire with the same 70% wall height your tire will be taller and if you keep the same width and go with a higher side wall % your tire will be taller. Sorry if I'm not clear, typing on iPhone while driving.

 

got ya. Going either way serves my purpose!

 

Check out the 295/70/17s i just put some on and i love mine

 

Have a better/bigger pic?