hey guys i have a 03 2500 hemi 4x4 nv4500 with 4.56 gear and i like to have some 35x12.5-17 or better 37x12.5-17, my door sticker said i have 17x7.5, there are the steel chrome ones, u guys think i'm going to have any problems with the tires i'm trying to fit?
and will i gain mpg or lose with my nv4500 and 4.56?
how about performance?

 

Right on the border. "By the book" specs call for the wheel width to be 3" narrower than tire width with 1" -/+ being ok.

Prolly be fine unless you air down for off-roading where it'd be real easy to lose the bead...

 

i'm going more for 37x12.5-17 so it will fit fine?, no off-road only city/hwy, any pro and cons?, on the 37 how much air i have to fill?
i guess with my set-up im pretty god for the 37
you need a pics of the rims?.

thx for always replaying hammer!!!!

 

The tire should tell you how much air you need but like Hammer said you'll be cutting it close

 

Can you fit 37s? I know the SFA will handle it but doesn't a 2500 4x4 need 2" of lift height to just stuff 37s? I'm also not sure if the stock wheels have the offset needed for a 12.5" wide tire on a 2500.

Fuel economy you should gain a little because you are ridiculously overgeared right now, so you should overcome the added rolling resistance and weight - BUT those two factors will decrease performance from what you are getting now.

 

Yea 37s will definitely require a lift. 2500 4x4s can only fit up to 35s stock. And I'm not sure on the width but if they can fit 35x12.5s stock I don't see why it couldn't fit 37x12.5s. But I really don't know. If anything get spacers as a temp fix until you get wheels with better backspacing

 

Yeah, 12.5" wide is 12.5" wide regardless if the tire height is 33, 35 or 37".

I dunno about the wheel spacer deal though. I know guys run 'em, but I've seen one have the bolts shear off on a Nissan Frontier pickup, so I don't like 'em on a 1/2 ton truck much less a 3/4 ton.

IMO do it right or don't do it...

 

Ok at least with my nv4500 with 4.56 Ill be good performer , I least better than stock, Thx guys!

 

Without a doubt. There is a formula for calculating "Effective Gear Ratio" which is what your gear ratio is in relation to your tire size.

Stock, I had 3.92 gears and 31.5" tires. When I lifted and went to 35" tires my effective ratio dropped to 3.52. Re-gearing to 4.56 gears brought my effective ratio up to 4.10 which is still a higher ratio (more performance) than the stock setup was...

 

Yep that's y I'm heading for 37, I know if a get the 37x12.5-17 they going to rub like a 35x12.5-17 because the 2500 have plenty off room, I see I lot off guys running 37 on stock wheels with no lift and same rub on vs like a 35.
O got a email from a guy that have a 04 same model n the door said wheels are 17x7.5 but there are actually 17x8 as Chrysler made a typo.