lifting my dually 4inch or 6inch any one know tires sizes

[BLK PWRSTROKE]

RipperF350- I put a 4" Skyjacker lift on my 05 and the 35" BFGs (actually 34.5") look small under there with a couple inches left of clearance. None of the shops or dealers will admit it but I'm pretty sure I could get 37s under there easily with no rubbing at all. Might need to pull back the rear fender and trim the front but she'll look so much better.

I've had the lift for 2 months now and wish I'd gone bigger. I still need to get my speedo calibrated. It's off by 5mph on the highway. I'm still running the stock gearing and I did notice a big decrease in power with a bigger tire but the Juice Platinum compensated for that... and then some!

I don't know anything about duallys but Lifted Up obviously has experience here. I'd consult with him more. Btw, Lifted Up... I was looking at your truck pics the other day... nice looking rig you got there!

 

[patrickc]

Lifted_up, Sorry. I should have explained myself better. I was trying to say that my 38x15.5's should be close to the same rolling resistance as a dually with 35's therefore I can't see that much of a fuel mileage difference compared to mine like Maintain's friend seems to be getting, providing her truck is set up right. (geared accordingly, speedo corrections, she doesn't have a lead foot, etc.)

My mileage drops (8-10 mpg city, and 12-13 mpg hwy) when I switch from my 38x15.5's to my 35x12.5's because of the increase in rpm thanks to my 4:56 gearing.

Currently I am running the superlift tru-speed correction unit. It works great. Last time I checked mine it was within 1mph.