Skinny or fat...
 

...tires that is on a stock height truck? I'm nearing new tire time, I have 10" wide rims w/ 325/60R15 BFGs(31x12.5 equivalent). I was think of either replacing them w/ same size but mud terrains or going with 16"x8" rim w/ 265/80R16 Super Swampers(32x10.5 equivalent).

What do you think?

Depends?
 

What you gonna do with them? Slinny tall seem to do better in mud. Most all the mud racers (bogs) around here have switched from the big wide tires to narrower taller tires. For sand or rock climbing big and fat with low air. Myself I like the big tires. Those 32 Swampers would do real well off road I believe.

i would stay with what you have only with mud terrain.

I personally would stay away from the 16" tire/rim combo. Still too much money in my opinion. I would find the tire you want to fit those 15x10" wide rims you have. Just don't go to wide. Might look funny wide but not tall enough. I'm like mudder, I like them big but don't go too far in either direction depending on your ride height.

I like the 16" rim combo and will eventually get rid of my 35 12.50 15 BFG MTs in favor of 325 75 16 (35 12.50 equivalent) when I switch to 8 lugs. My last set of 35's lasted 10 years, so at that rate the slightly higher price was moot IMO. My vote is the 16's! FYI, we put a Fabtech 4" lift on my brother's 96 extended cab truck. We got a set of 265 75 16 BFG all-terrains that had been returned after 2 days on some soccer mom's suburban (she didn't like the noise) for $75 as demos with full warranty. The BFGs with some some Eagle 580s in 16x8, centers, lugs, mounting and balancing it was $800 out the door! The 265 75 16 is a nice size tire, actually. Fills the wheel well nicely and is a lot cheaper than the larger tires FWIW. That's what I run on my 70 2500. Shop around and try to get a couple of dealers to battle out the price with you! I did that with my 35 12.5 BFG MTs and got them for $125 each. :D

I'd have to disagree (to a point) on the wide tires not being for mud. It depends on how heavy you are. My '69 K10 has never been stuck, simply because of the "floatation tires" it has on it (either 10" or 12.5" depending on my mood). It just floats over most mud, but it will sling enough out of the way to go forward anyway. I've even had to pull some serious mudders out of the mud with it, and I don't consider myself "serious".

well from most of my experiances, which are all mostly at pismo sand dunes and alot of mud.....alot of guys that get those 16 inch rims and once they let air out they blow their bead off the rim and loose the tire. alot of the 16 and 16.5 inch rims have just barely started to come out with the little extra bead lip in the tire that the 15 inch rim has, But like i said from MY experiances, i am sure all of you have other say so's, but on my 72 chevy i have raced it at the dunes with about 5 lbs of pressure in the tires and have never had a problem i run a 15x10 rim, i say stick with the 15's you got a larger selection of tires too!!!

Thanks for the input...
 

.... Decided to lift 2" and get 33" tires for my 15" rims. Looking at all terrain tires. Maybe the Geolanders from Yokohama.

The 16.5 do not have the bead retaining ring, but the 16's ALL do. That is why I won't run 16.5's but is why 16's and 17's are the rage now. You can get all of the height but reduce the amount of sidewall with the larger rims.