Member III
I am actually doing a bit of reading up on those tires now. I still have another 30k miles on the current ones since I run high 38psi up front and my mileage has been mostly hwy. The link below is a good read! It is a review done by offroadxtreme.com.An SL 255/70/18 weighs 42.8 lbs 32.1"
An E LT 275/65/18 weighs 60.1 lbs 32.1"
That's 4ply SL vs 10ply E rating big difference in weight. I have a 2018 Wrangler Unlimited Sahara I don't NEED 10ply tires. Neither does my wife's 17 Z71 Colorado. My 2004 Silverado Z71 has 10plys though.
Yes weight makes a big difference and purchasing unnecessarily heavy ply tires for the application will definitely hurt performance.