I got a quick question for the tire experts. I had 215/85R16's all terrain tires on my truck. I just put on 2 new 235/85R16's Pathfinder A/T on the front and 4 new 235/85R16 BFG Mud-Terrians on the back, is my fuel economy going suffer or improve with the change? Also, how far off is my speedo and odometer going to be off? Thanks y'all.

 

i still get around 17 with either 33's or 35's. doesn't affect my truck much. the mud terrains shouldn't be a problem. speedo shouldn't be off too much.

 

i thought 235 was the aspect ratio? wouldnt it otherwise be the same?

 

85 is the aspect ratio.

 

Plug the numbers in here...and see for yourself! Cool Site. I get 3 MPH difference with your new tires.
http://www.sjdsm.com/tech/tire_size.htm

RJ

 

Great site, thanks rjohnson! I had seen that page a while back, but couldn't find it again. That will help alot.

 

I have 235's on mine and have a 3.5 mile loss on the ex-way over 100 miles.