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-   -   Adding 33X12.5X15 Tires to my Stock Grizzly 15X7 Wheels (http://www.wranglerforum.com/f282/adding-33x12-5x15-tires-to-my-stock-grizzly-15x7-wheels-100745.html)

craigsjeep 07-02-2011 07:18 AM

Adding 33X12.5X15 Tires to my Stock Grizzly 15X7 Wheels
 
Is there any reason this tire and wheel combination will be a problem? I will be using it on a 97 TJ with 3" BDS suspension lift and wheel spacers. The primary reason is that I like the stock wheel look and also want to save some money by using the stock wheels. Are the 33X12.50s to wide for the 7" rims?

uf20wop 07-02-2011 07:33 AM

as far as i know, i think the min for a 12.5 tire is an 8" wide wheel

4Jeepn 07-02-2011 07:40 AM

It will fit on the rim, but the tire itself will rub. Save up for some 15x8 rims with 3.75-4" of backspacing which will push it out from the Jeep and you should be fine.

UnlimitedLJ04 07-02-2011 07:50 AM

Quote:

Originally Posted by 4Jeepn (Post 1347749)
It will fit on the rim, but the tire itself will rub. Save up for some 15x8 rims with 3.75-4" of backspacing which will push it out from the Jeep and you should be fine.

x2 on this.

look at the rear axle, and the distance from the tire to the rear spring perch.
http://i133.photobucket.com/albums/q...ck_Spacing.jpg
^thats a 31x10.50R15 BTW.

if you don't change the backspacing you'll destroy/cut up the inner sidewalls of the tires.
http://i268.photobucket.com/albums/j.../trackbar3.jpg

craigsjeep 07-02-2011 08:00 AM

Would the wheel spacers help this? Also if I go to 33X11.50 or 33X10.50 will it look funny?

UnlimitedLJ04 07-02-2011 09:21 AM

Quote:

Originally Posted by craigsjeep (Post 1347766)
Would the wheel spacers help this? Also if I go to 33X11.50 or 33X10.50 will it look funny?

yea, wheel spacers will help, but some are not a big fan of them. As long as they are quality, like Spidertrax spacers made from 6061-T6 aluminum, and maintained they're fine. I'm not a fan of them myself, not because of some mechanical issue but because most tire shops will not work on your vehicle. Nobody around here will touch a vehicle with wheel spacers or adapters.

A good set of spacers is almost the same price as a new set of wheels....so might as well get new wheels anyway since 15x7 is a bit narrow for 12.5 wide wheels. 15x8 is usually considered minimum. next 33x10.50R15 wheels are hard to find...BFG is about the only brand that sells them. They'd fit, but you'd still need wheel spacers or to adjust the steering stops.

dmcg 07-02-2011 11:17 AM

Don't use wheel spacers to squeeze 12.50 on 7" rim, its just wrong. I have the BFG AT 33x10.50r15 and I love them!

Jerry Bransford 07-02-2011 11:19 AM

Don't do it. #1, those wheels have too much backspacing so the inside sidewall of those 12.5" tires will rub on the suspension like crazy. #2, a 7" wide wheel is too narrow for that width tire. Go for a 15x8 wheel that has between 3.75" and 4.5" of backspacing which will work fine.

missingbite 07-02-2011 11:44 AM

I use BFG KM2's at 33X10.5 on stock rims and they work great. I do have very little rubbing in reverse at FULL wheel turn. I could fix it with a couple of washers but for the light rock crawling I do it's not a problem. I still can't figure out the advantage of a 12.5 wide tire over 10.5. I know there is an advantage in some situations but mine are great at 10.5

craigsjeep 07-02-2011 11:28 PM

missingbite-have you got some photos of your 33x10.5s? Does it look a little odd to have tall and narrow tires. Someone called them cookie cutter.
Anybody know what I'd be sacrificing with 33x10.5s instsd of 33x12.5?

MikeMTJ 07-03-2011 01:24 AM

http://i1231.photobucket.com/albums/...e/DSC_3912.jpg
http://i1231.photobucket.com/albums/...ke/photo-1.jpg

Those are 33x10.5s on my YJ before I sold it.

I think it's a great tire for the terrain in my area. Unfortunately there is a ton of mud in NE Ohio, so sometimes ya gotta trail ride through the woods and in the mud before the rocks. I like the way a narrow tire handles, and it's also less stress on your unit bearings. They weigh less, and they are cheaper.

It's all subjective though. I read a really detailed article about the differences between going narrow or wide. Jerry actually might have posted it, but I can't remember.

Jerry Bransford 07-03-2011 10:29 AM

Quote:

Originally Posted by craigsjeep (Post 1349229)
Anybody know what I'd be sacrificing with 33x10.5s instsd of 33x12.5?

Only more floatation in soft sand or mud. In fact, on snow or rain covered streets, the narrower 10.5" tire would do better. It will dig through the snow to the pavement below more easily and it can be driven faster before it will hydroplane when it is raining. The wider the tire, the easier it hydroplanes and the more easily it will slide on ice.

missingbite 07-03-2011 12:43 PM

My profile pic is of 33X10.5 on a TJ. I love the look and it drives great. I can air down for rock crawling and I go anywhere the other guys in my club go. I haven't seen a reason for 12.5 except for where Jerry said. I am at 7000 feet MSL with rocks and snow.

missingbite 07-04-2011 10:35 AM

I just realized my profile pic is no longer there. I added one back. Not sure how to post a pic but if you want I will send you a couple of pics via email. Sorry.


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