Any chance it would fit?

 

Will it Fit? Probably, Yes.
Dangerous as hell and shouldn't do it? Definitely Yes

Think of it this way...the stock rim is only 7" wide. If you throw a 16.5" tire on there it's double the width of the rim. That raises a major safety concern in my eyes. If you hit a big pot hole or bump you'd probably blow out extremely easy. I wouldn't go above a 10.5" tire on stock rims...MAYBE push it to an 11.5" tire, but 16 is just a bad idea.
Beyond it fitting on the rim just how would you plan to fit that onto your truck? There is no way you'd get a 16" wide tire on a Blazer without serious amount of lift and cutting of the fenders/wheel wells etc. It's a squeeze just to fit 31x10.5 in there with 2" of lift. Imagine a 16" wide tire.

 

Just a question. Thanks for the answer man, just saw a set really cheap. I'll be going with 10.50.

 

Sucks when you find sweet tires like that for real cheap knowing they won't fit eh? I've seen a few sets of 32's I've been temped on, but I know I wouldn't be able to fit them without a decent amount of lift. And that's not going to happen anytime soon lol.

 

A 31" x 16.5" tire? Wow, I don't think I've ever seen a tire with those specs.

 

you sure they weren't 31x15.5r15?
like truck puller tires?

 

not sure, just said it was off a 3/4 ton pick up

 

Probably a 31" diameter 16.5" rim, not 16.5" section width.

 

Thats what I was wondering as well. 16.5 seems WAY too big.

 

yeah, the widest tire i could find listed was a 31x15.5, but it came back with zero search results.

like Kyle, when i first saw the OP, i was thinking he meant to say they were 16.5" rims. but i only ever saw those on my Dad's old '76 3/4 ton Chevy.

hell, i don't think there is enough lift available (or even a safely made custom job) that would allow you to fit a 15 or 16 inch wide tire on these trucks. what's the depth of the wheel wells............maybe 9, 10 inches max?