i have a 6" lift in my dually with 35" tires on it. its getting close to new tire time and i want to go bigger...how big can i go with the dually? 38...40?

 

What kind of spacers are you runnin?

The only prob with a dually is the width fo the tires and I wold be kinda scared to run a spacer over 2"s. Depending on what kind of tire you want I would try a 37x12.50 or 38x12.50

 

im using a 2'' spacer now and i still have plenty of room between the 35's

 

I think a 13.50 would be absolutley as wide as I would go, just my opinion. With a tire that tall I dont guess youll be hookin to any goosenecks so if you are not gonna load the bed much then you could have the sidewalls pretty close and not worry about em touchin.

Depending on how much you drive the truck some 39x13.50 iroks might work. But I here they wear quickly.

 

i was thinkin of the nitto mud grapplers like a 37'' 38''

 

With just a 6" suspention I would go with the 37s. If you did a body then go 38s, I thought you had a 3" body but now that I look back, I dont think I see one.

Some run 37s with a 4.5 but I would think that if you wheel very hard it may rub.

Either or, 37s or 38s should work but the 37s should be issue free.