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Old 03-02-2012, 03:14 PM   #1
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if i want to run a 33 x 12.5 tire how wide should the rim be

this might be a stupid question but if i want to run 33s x 12.5 how wide does the rim have to be

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Old 03-02-2012, 03:20 PM   #2
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15x8, 16x8, etc

or you can go up to 10's if you really want to but I'd stick with the 8's...

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Old 03-02-2012, 03:21 PM   #3
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It depends on what type of tire you want and what kind of driving you are going to be doing. I'm running 33" x 12.5" x 15" on 15" x 8" rims, Dick Cepek Crushers. Most of my driving is off-road and I air down to 12# or so to take advantage of the increased sidewall flex. For highway driving I use 28# of pressure and have no problems at 65mph or so.
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Old 03-02-2012, 03:26 PM   #4
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It depends on what type of tire you want and what kind of driving you are going to be doing. I'm running 33" x 12.5" x 15" on 15" x 8" rims, Dick Cepek Crushers. Most of my driving is off-road and I air down to 12# or so to take advantage of the increased sidewall flex. For highway driving I use 28# of pressure and have no problems at 65mph or so.


i was actually looking at getting dick cepek rims
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Old 03-02-2012, 03:56 PM   #5
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An 8" wheel will generally hold a bead better than a 10" wheel.
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Old 03-02-2012, 04:00 PM   #6
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X4 on the 15x8 recommendation. A 15x10 would be ok for street use but a 15x8 works better for combined offroad and street use.
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Old 03-03-2012, 10:17 AM   #7
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Some of the sites to purchase the rims will say you will need 10" widths, for certain 33x12.5 tires, some say 8" width is ok. This is just because full flat tread contact may not be made with the road. Either way 15x8 is fine for 33x12.5s. Hope that made sense.
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Old 03-03-2012, 06:43 PM   #8
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yep 15x8s! DC2s too
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Old 03-03-2012, 07:42 PM   #9
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what is the with of the stock alloy rims?
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Old 03-03-2012, 07:44 PM   #10
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Quote:
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what is the with of the stock alloy rims?
They're usually 7" rims
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Old 03-03-2012, 09:09 PM   #11
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My stock rims were 15x8- Gamblers
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Old 03-03-2012, 09:10 PM   #12
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weren't the alloy rims 15x8, and the steel rims 15x7
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Old 03-03-2012, 09:13 PM   #13
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It's been 15 or so years since I had the factory Gambler alloy wheels but it does seem like they were 15x8.
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Old 03-03-2012, 09:30 PM   #14
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Quote:
Originally Posted by TJNewbie
weren't the alloy rims 15x8, and the steel rims 15x7
They absolutely were, the problem comes in with back spacing, if you want to run factory wheels on a 12.50, you will have to use (gasp) spacers to keep the tires from running. About a 1" should get it close, I think the back spacing on most tj alloys was around 5.5" and it needs to get down to 4.5 or less at least.
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Old 03-03-2012, 10:00 PM   #15
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Do i need to do spacers on front and rear and spacers wont they break if they abused?
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Old 03-03-2012, 10:05 PM   #16
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Do i need to do spacers on front and rear and spacers wont they break if they abused?
Yes you will need them all the way around. I think spidertrax makes a good set. They are basically hub extensions that attach to your factory lugs. The cheap spacers are crap and wont provide enough clearance anyway. But remember to locktite them on. I had one back off because I suck at reading directions. Other than that they were fine.
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Old 03-03-2012, 10:13 PM   #17
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So 1in or bigger?
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Old 03-03-2012, 10:52 PM   #18
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Should be fine. Do a quick search and see who is using them. Mine was on a jk.
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Old 03-04-2012, 12:42 AM   #19
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Originally Posted by Jerry Bransford View Post
It's been 15 or so years since I had the factory Gambler alloy wheels but it does seem like they were 15x8.
Indeed they are .

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Old 03-04-2012, 01:23 AM   #20
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Some of the sites to purchase the rims will say you will need 10" widths, for certain 33x12.5 tires, some say 8" width is ok. This is just because full flat tread contact may not be made with the road. Either way 15x8 is fine for 33x12.5s. Hope that made sense.
This is true. Tire Rack won't mount my 33x12.50 Duratrac's on 15x8 rims. Their reasoning was because Goodyear recommends a 12.5" wide tire to be on at least a 8.5" rim.
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Old 03-04-2012, 09:51 AM   #21
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This is true. Tire Rack won't mount my 33x12.50 Duratrac's on 15x8 rims. Their reasoning was because Goodyear recommends a 12.5" wide tire to be on at least a 8.5" rim.
I think you're mistaken. I bought my 33x12.50x15 GoodYear Duratracs and my DickCepek DC2 15x8 rims from Tirerack.com they mounted/balanced and shipped them to my house last Sept. Even gave me a warranty on the wheels and tires. (maybe the wheels you decided on didn't have the proper backspacing?)
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Old 03-04-2012, 10:00 AM   #22
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I think you're mistaken. I bought my 33x12.50x15 GoodYear Duratracs and my DickCepek DC2 15x8 rims from Tirerack.com they mounted/balanced and shipped them to my house last Sept. Even gave me a warranty on the wheels and tires. (maybe the wheels you decided on didn't have the proper backspacing?)
Nope not mistaken on my end. I tried a few different sales reps. They tried, but everytime they printed the order it said right on it they won't mount and balance the tires. Tried different 15x8 rims and it still didn't work. I gave up and just got the tires from them and went with completely different wheels.
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Old 03-04-2012, 10:06 AM   #23
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Some tire stores are manned by little more than trained monkeys who do strictly as told and will only go by what their books say. When that happens, I go to a different shop that has a staff that is astute enough to know what works and what doesn't.

As much as I like Discount Tire stores, they always gripe me by requiring the lug nuts be torqued to what their book says which is 110 ft-lbs. I always insist 90 ft-lbs because I don't want 110 ft-lbs. on the type of wheels and lug nuts I use. They were insisting the factory required 110 ft-lbs. so yesterday, I whipped out my Mopar Factory Service manual I happened to have in the back of my Jeep and showed them the factory actually says 80-110 ft-lbs. They were stunned to read that the factory said 80-110 ft-lbs. and not 110. They were happy to tighten them to 90 ft-lbs. after that.
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Old 03-04-2012, 10:28 AM   #24
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Must've changed their policies....
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Old 03-04-2012, 04:10 PM   #25
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Some tire stores are manned by little more than trained monkeys who do strictly as told and will only go by what their books say. When that happens, I go to a different shop that has a staff that is astute enough to know what works and what doesn't.

As much as I like Discount Tire stores, they always gripe me by requiring the lug nuts be torqued to what their book says which is 110 ft-lbs. I always insist 90 ft-lbs because I don't want 110 ft-lbs. on the type of wheels and lug nuts I use. They were insisting the factory required 110 ft-lbs. so yesterday, I whipped out my Mopar Factory Service manual I happened to have in the back of my Jeep and showed them the factory actually says 80-110 ft-lbs. They were stunned to read that the factory said 80-110 ft-lbs. and not 110. They were happy to tighten them to 90 ft-lbs. after that.
I would typically do the same, but with Tire Rack having a warehouse location in CT it makes their prices pretty cheap to get tires and rims. No shop in CT could come close to the price. I ended up with 5 33x12.5 Duratrac's for under $900 after tax. Plus Goodyear is doing a $60 rebate with the purchase of 4. The closest place around me was about ~$220 per tire.

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