So to start off I have a stock height blazer, no sag in front or rear (installed new components 2 weeks ago) and want to get some summer rims and tires. I am looking at the Ion Alloy 186 but have been told by the manufacturer they are not sure if it will fit. I really want the Ion Alloy 133 but he said they will stick out 3-4". I will link both sites here because they list all the info about offset and bolt pattern. I wouldn't mind the rims sticking out a bit more, maybe make them flush with the fenders. But if anyone knows how to size these things I would be much obliged.

Ion Wheels - Style 133 Black w/ Machined Lip, Ion Rims in Canada. Ion 133

Ion Wheels - Style 186 Black/Machined Face, Ion Rims in Canada. Ion 186

I love the look of the 133 but know they may not work. Let me know what you guys think. Oh, and I am running stock tire size of 235/75R15. I don't want any rub as I plan on taking her off the beaten path when I do my camping expeditions.

 

The 133's don't list the correct bolt pattern so I would say that they won't work.

The 186's would stick out about 1" more than stock, which would put it pretty close to flush with the fenders.

 

The 5x114.3mm is the same as our "standard" 5x4.5" bolt pattern.

With the offset being at -27mm (1"+/-) and the rim width being 8", take half the rim width (4), plus the offset (1), and measure out from the caliper, and that should show you roughly how far just the rim would stick out. With a 235/75, you're going to see around a 9.3" wide tire, subtract the rim width (8), which leaves with a the tire being 1.3" wider than the rim. Take that 1.3" and divide in half (sticking out on both sides), and that'll leave you with .65". Add that to your earlier measurements of the rim (roughly 5") which would give you an end size of 5.65" from the caliper. Just take a front wheel off and measure from that caliper facing that 5.65".

This will show you just how far the wheel and tire combo for the 133 will stick out.

 

Where in the world did you get such bad information?
Our bolt pattern is 5x4.75 or 5x120.65, it's a well known fact.

 

the bolt patter on all s10's and s10 blazer's is 5 x 4.75 not 4.5.

 

Yeah, that was my bad, and I knew that. For some reason my brain stuck with 4.5. Terribly sorry about that.

 

So I took a front tire off at the shop yesterday and the 133 looks like it is gonna stick out quite a bit. Guess I'm gunning for the 186's. Thanks for the help guys.

 

I just ordered a set of the 186's and was worried about them fitting to. I was a little confused about the offset thing vs backspace. I am used to BS. I just found a converter and figured it out to be a little over 5.2" BS. Which isn't bad at all compared to stock 6" BS. Someone please correct me if I am wrong here though.