The 17's with a taller tire is better for rough terrain but the 18's are better for highway handling? The 17's would air down better if you needed to do that. More sidewall height also provides better distance between rocks and the metal wheel - so yeah the 17's would be better for this discussion.An excellent point, Silver. I was headed for Falken Wildpeak A/T Trail 235/65-17s on Method 502s, a combo which I think looks really cool. After thinking about your comments and re-reading Wes Siler's article and the team-bhp post, I've decided to go with Method 501s and 225/65-17s. That will save me over 5 1/2 pounds of unsprung weight per wheel. I still think there is an advantage to going down to 225/65-17 from the OEM 225/60-18s- which basically weigh the same but have more sidewall and higher load; 102H 1874 vs 100H 1764. What say you?