pretty simple, will a 31/10.5/15 A/T or M/T fit on a stock blazer rim with no issues?

well check out my pics......no rubbing or anything....just make sure u remember there is like no space left in the wheelwell so keep that in mind before you start running over cars

Yes that size tire will fit on the wheel no problem, fit under the truck is a diferent topic.

The general rule of thumb is 4.5". You can go up to 4.5" wider then the rim wideth. If your running a 15x7" factory wheel, the maximum tire wideth is 11.5". Tire diameter doesn't matter except to fit under the truck. 15x8" and 12.5" wide will fit on the rim.

A realy good source is the tire manufacture, they have recommended rim wideths for every tire they sell.

Yes they fit.
As long as you dont forget you have them on there. Big dips in the road and speed bumps can make them rub. It kinda bent out the metal on the fender a bit.

Nothin a rubber mallet cant fix though!

If I do decide to get some wheels too, would I be better off with a 15x7 or a 15x8? Would the wider 15x8 make the rubbing issue worse?

anyone? anyone? will an 15x8 inch rim with a 31/10.5 tire rub more than a 15x7 rim?

Bueller? Bueller?........................................Bu eller?



The answer to that question lies in the backspacing. IF, and that is a big IF, you can find an aftermarket rim with 5.5"-6" of backspacing, it shouldnt be too much of a problem with 30" tires. The issue with oversize tires and/or wider rims is where the tires are located in the fender well. Or rather out of the fender well. The most common place for the tire to rub is on the outside edge of the fender, especially in the back of the wheel well. After that the tire will rub the frame at full lock. With a rim that has less backspacing it pushes the tire out of the fender more. This means it will hit the back of the fender well.

31" tires will rub on a factory set-up. Like he pointed out it happens over bumps. Forget about using it off-road if your already rubbing on city streets. In my book, a 31" tire doesn't fit if it rubs. To make a 31" tire work, add a 2" suspension or body lift. Or be prepared to eat tires and sheetmetal.


The short answer YES!!!!!

even with a 2 inch body lift, wont the tire still rub on the frame at full lock? or i guess with a body lift you could use less back spacing because the tire wont hit the back of the fender well. is that correct?

what kind of back spacing is this running?

http://memimage.cardomain.net/member_images/9/web/2289000-2289999/2289079_12_full.jpg

i take it those rims (crager soft 8) dont have much because of how much they are sticking out? that truck has a 2 inch body ift as well

Having wheels with a different backspacing should solve the problem of rubbing the frame while turning.
But, it wont help at all with the tires hitting and tearing up the fender.


Click on my gallery to see what I mean.
Its been worse than that before but I always pound it straight with a rubber mallet. The tires also gets chunks cut out of them from the metal thats sticking out.

kellen---looks to me like that blazer in the pic has somewhere around 4 inch backspacing with 7 inch wide rims, doesnt look like it is but it could also be 6 inch backspacing with 9 inch rims.

[8D]

nails,
I have the same damage and its from a 30". I bottomed out hard while wheeling.
http://offroadworld.tenmagazines.com/gallery/Hanr3/117416.jpg

ITs hard to tell what size tires hes running or what backspacing. An educated guess would be in the 3.5"-4" backspacing on a 7" or 8" wide rim.

He's running 31/10.5/15.

Here's the guys page.

http://www.cardomain.com/ride/2289079

And that Blazer also has a 2" body lift as well as 2" lift shackles on the rear and probably jacked up torsion bars up front...

Yeah I read that.

Well, after reading all your great advice, I think I will go with a 30/9.5 BFG MT.


What is the backspacing on the stock rims? Because I'm guessing even with just a 30 inch tire, If I go with too little backspace, it will still rub on the back off the wheel well, right? I do like the look of the tire sticking out a bit like the pic i posted. So basically, on a 15x7 or a 15x8 wheel, whats the least amount of backspace i can run without having a 30 inch tire rub on the read of the wheel well? Hanr, you could probably field this one :)

PS thanks for all the great info, and answering my dumb questions, I'm a total truck 4x4 noob.

The Cragar Soft 8's are available in either 3.75" or 4.5" backspacing. It looks like the truck in that pic is running the 3.75" ones.

The stock 4wd rim 15x7 has 6" backspace, while 2wd versions have 3.75" backspace.

Now some bad news: Even people running the 5" TM lift with 31s on low backspace rims have problems with rubbing (on the fenders). The only way it works well is to keep the backspacing on your rims close to factory specs, so no smaller than 5". American Racing sells a few decent rims in that category, but selection is pretty slim now a days. If you want steel rims, give Eaton a call. They make some notoriously tuff steel rims for off-roading (DOT approved) and they always do them special order. So you should be able to request the proper backspacing that way. Expect to pay between $80 and $120 for 15x8s though.

I'm running 31x10.5 R15 Pro Comp xTerrains on 15x8 American Racing Slider rims with 5" of backspacing. That's with a PA 2" body lift, 2" rear shackles, and a slight crank (1/2" to 3/4") to the torsion bars. The shackles were to offset sagging rear springs and the torsion bar crank to offset the drag look caused by the shackles. So far so good, on pavement or off-pavement.

I don't have any pics of mine, but the link below is of someone else running pretty much the exact same setup as I do (lifts, tire size [though MTRs run slightly smaller than normal], and wheels).

http://www.s10extremist.org/georgesblazer.htm

I was on the phone with National 4WD today ( http://national4wd.com/ ) asking about some steel wheels in a 15x8. I'm trying to get a black steel wheel in either cragar soft 8 style or american racing 767 style.

soft 8
http://static.summitracing.com/global/images/prod/norm/crr-3975034_m.jpg

767
http://www.tirefactory.net/767b.jpg

basically in a 15x8 in either of those style of wheels, the most I can get is 4.5 inches backspacing. So my question is are those going to work? With a 30/9.5/15 mud terrain, am I going to have issues with rubbing on the fender? Also, would that look too out of wack?

Bump!


I'm planning on buying wheels on saturday.

Is a 30/9.5 tire going to rub on a wheel with 4.5 inches of backspacing as opposed to the factory 6 inches?!?!?!

ORIGINAL: Kellen

Bump!


I'm planning on buying wheels on saturday.

Is a 30/9.5 tire going to rub on a wheel with 4.5 inches of backspacing as opposed to the factory 6 inches?!?!?!





if 6" doesnt rub why would 4.5"? what offset negative or postive?

A 30x9.5/15 is the biggest tire you can fit on the dime with zero rub. increase the size increase the rub risk.

less backspacing = wheel/tire sticks out more.

I'm worried about the front tire rubbing on the fender when I turn.

Great post mdnky. [sm=exactly.gif]

A 30" tire is only 1" bigger then stock 235/75R15 tires, thats a whole 1/2" per side. IF the tires are really 30" and not 29.5" which is typical. Not every tire is exactly the size listed. Check the manufacture. I'll use the BFG All-Terrian tires for example. The 30" tire is actually 29.5" in diameter. And the 235/75R15 is 29" in diameter. That's a whole 1/4" diference per side.
BFG KO sizes (http://www.bfgoodrichtires.com/specs/all-terrain-t-a-ko/44.html)


4.5" backspacing and 30" tires would be close. Real close. But I think you'll be fine with that set-up. You might end up doing a slight-bar crank, but nothing major.

Great! Thanks Hanr3. 15x8 with 4.5 inches of backspacing and 30/9.5 is what I'll go with.

KO's blow, 1 season on the ram and they have 25% treadlife left and its mainly a highway vehicle.


Id shop around for tires, I wouldnt put any BFG on my vehicles except the radial T/A because they last forever.


Just what ive experiences, Im going to run General Grabber AT/2's and If i dont like those its Nitto terragrapplers.

Well I was planning on going with BFG mud terrain, but I think I might try out the Hercules Durango MT.

http://www.herculestireca.com/tireIndex/pdf/DurangoMT.pdf

They look decent and they are about $40 less per tire than the BFG.

Detroit muscle you need to control how you drive, properly inflate your tires or get an alignment. I've gotten 80k on my BFG AT KO on my durango and I'm finally about ready to change them. The truck has done everything from running down trails in the woods to highway to city to dirt road driving.

Kellen - I have the BFG mud terrains on my blazer now 30x9.5 on stock wheels. They fit perfect and they are the best mud tire I have ever purchased. Incredable amount of grip in dry, muddy snowy conditions. They only thing they really lack were wet traction. After I realized that I went back and spent an extra $30 bucks to have them siped and now they are pretty much perfect tires in any condition. I've yet to have them on ice yet but we'll see in the near future here :)

what is the stock bolt pattern?

5 on a 4.75" bolt circle.