Will 31X10.5R15 109Q fit on my 86 s10 blazer and also what lift should I do?
 

I have bought my 86 s10 blazer 4x4 5speed a year ago. I have been fixing it up and its road worthy other than the panels. Its has the 2.8 in that's strait piped with a cherry bomb muffler. If u could please help me that would be great.

They won't fit stock. I was able to clear 31's after a 2" body lift which only ran me $250. You could also go the session lift route which will give you 1-3" but will cost you $500. Just make sure you decide whether the tires are for show or off roading, that way you'll be able to choose which kit makes the most sense.

Hope that helps boss man

First gens might be different, but a 10.50" tire will rub against frame and sway bar at full lock with the stock 6" backspacing. 4.5" will leave you plenty of room.