P Rated All terrain Tires vs P Rated Light Weight Rugged Terrains for Best Fuel Economy?

[ggrjordan]

Hi guys! I know it’s obvious that a lighter at tire will be the best option for fuel economy given the weight and tread pattern, than the rugged terrain. But here’s my specific case. Just wanted to hear your opinions:

I currently have 31” Mud Terrains that weigh 39.5lbs (so 58lbs total weight per corner with the wheel which is 18.5lbs). The two options I’m considering are an AT that weighs 24lbs with a street focused tread pattern, or an RT of I think a weight of 29-32ish lbs (could be the the same weight as the AT but I didn’t weight this one, just felt it) with a very similar tread pattern to the nitto ridge grappler.

Will there be a noticeable difference in fuel economy between the two?

How noticeable will the difference be going from 58lbs to 42.5lbs with the AT tire vs going from 58lbs to say 48.5lbs with the RTs?

I overland a lot and also like to offroad moderate to light trails a lot.

I left pictures of the tires below.

Thank you all.

Jeep liberty kj 2002 limited
4:10 gears
Twin locked with Spartans
Ironman 1.5” lift kit
31” mud tires

 

[HoosierJeeper]

Makes a huge difference - rotational mass has like a 4x factor. So 10 pounds of rotational mass is like 40 pounds of mass in the Jeep. Multiply that by 4 wheels, an extra 160 pounds. Check out the Toyo Open Country AT3, very light weight tire but does great on and off road. Same with Nitto Terra Grapplers and Recon grapplers. Balance nicely too.