First off, I have an 07 NBS, would a 15'' rim even fit?

I have a suspensionmax leveling kit on and Im lookin to run 33 x 12.50 BFG Mud Terrain. I cant decide if I should go with the 15'' or 16" wheel.

 

nope 15s wont fit cause of the brake setup unless you grind your calipers.
what wheels are on your truck now 17s?

 

Give me til monday and i'll post my setup, 17x9 w/ 33x12.50

 

i think he was worried about cost for the most part, i think 15s are significantly cheaper than 17s

 

I got the 17's on there now, but the tires waitin for me in the garage at home were on a 15 inch rim before, so they have to go on a 15 right. If not I would probably get 16's.

Why dont more people run 15, wouldn't that be better for offroading - more rubber. Wait a minute, that was answered before when I was told they wont fit with the brakes - got it.

What do ya think, is it hard or bad to shave em down?

 

im pretty sure you need 17s to clear the front rotors. i personally havent heard of anyone ever making a different size tire fit on a different sized rim.

 

Tires are made for a specific size "period" They can not be made to fit on any other size than the one they where made for. You can't even fit a 16" tire on a 16.5" rim, people have tried for lack of paying attention and it ruins the tire. As far as what can fit on a NBS I have know idea what will fit over the brakes. Really depends on the size of the rotors.

 

i would not grind anything down on the brakes so you can save a few dollars on tires. the 07s come with 17s for a reason. If gm could get by with putting 15s or 16s on them they would because it would save them money on tires and wheels. if your wanting more rubber then i would suggest putting a larger lift on and then putting some large tires on with 17" rims.

 

My 05 came factory with 17s, I had to grind the calipers on the front to get my 16s to fit. so no 15s. sorry

 

Thanks for the info! 17's it is.

I got a pair of 33 x 12.50 BFG Muddin T's for sale on 15's with a 5 lug bolt pattern if anyone is interested.