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post #1 of 16 (permalink) Old 05-13-2004, 06:06 PM Thread Starter
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275+mm tires...

I don't wanna limit myself to 255mm wide, so how can I get 275mm or wider to fit on a '92 Sport, without rubbing the fenders? I'm looking to get 17" rims, and lower the car a couple of inches, too.

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post #2 of 16 (permalink) Old 05-13-2004, 06:12 PM
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Get a 17X9 rim with an offset of 30-36mm and put the 275 on there. You might need some airlift airbags (depending on how much you lower it) or roll the fenders.


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post #3 of 16 (permalink) Old 05-13-2004, 06:15 PM Thread Starter
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How high of an offset can I get for this car?

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post #4 of 16 (permalink) Old 05-13-2004, 08:51 PM
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Depends on if you are talking about positive or negative offset. I assume postive offset and I would say that you can use a +40mm offset (~7" of backspacing), but you would run the risk of rubbing on the inside. You can use probably about a +24mm offset with a 9" rim and it will be on the edge of sticking out. It would probably have issues with the fender and need modification or air bags.


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post #5 of 16 (permalink) Old 05-13-2004, 09:17 PM Thread Starter
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Thanks for your help.

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post #6 of 16 (permalink) Old 06-10-2004, 09:34 PM
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Cool

Im running 285 in the back with 36MM off set and is lowered , looks great , no rub .With 17 inch wheels. DW
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post #7 of 16 (permalink) Old 06-11-2004, 11:29 AM
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Quote:
Originally posted by Ballman
Im running 285 in the back with 36MM off set and is lowered , looks great , no rub .With 17 inch wheels. DW

Ditto, 17x9 '03 Cobra's with +36mm offset...except I'm running 275's. I'm lowered about 1 1/2" in the back and there appears to be plenty of room, I'll more than likely go larger when these tires wear out. They haven't rubbed yet even though they look like they're about perfectly even with the fenderlip.


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post #8 of 16 (permalink) Old 06-11-2004, 11:46 AM
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I am running an 18 x 9 with 30 MM offset on the back and 255 tires, the lip is pounded up and they still rub with a person sitting in the back seat during hard corenering and decent size bumps. So you definitely need more than 30 for a 275. My 255's are about perfect as far as not sticking out goes.

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post #9 of 16 (permalink) Old 06-13-2004, 05:28 PM
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I have 17x9 cobra r's on my mark with 36mm off set. I have 275's out back and I needed to do al ittle fender roll. Didn't need much more space but a little. If you are going to roll the fenders use a fender rolling tool!! Don't do it half *** with a baseball bat and take a chance of bending up the outside. The tool is easy to use and does a great job. Good luck!!

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post #10 of 16 (permalink) Old 06-13-2004, 06:11 PM
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There is a tool specifically for rolling fenders?

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post #11 of 16 (permalink) Old 06-13-2004, 06:21 PM
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yea, it works great too. It bolts to your hub and it has a nylon roller that accurately and smoothly roller the inner lip up. I rented from www.splparts.com for about $50 including shipping both ways. The tire rack rents one for free (just shipping) but there is a waiting list that is about 6 months long. If you do a few searches on line you will find a few places to either rent or buy one (go for about $250). The guys at spl parts were great, they never shipped it out for rental before but they were happy to. I put down a $160 deposit, and the balance was returned to me when I returned it to them. They assume you keep it for about a week. It's definitely worth doing. Just make sure that after you roll it you use some rubber undercoating on the inside of where you just rolled up. I think this could potentially be a very easy spot for rust to start if you don't take the right precautions. Also it's goo to have a heat gun to heat up the paint a little bit as your rolling to minimize cracking. No matter what you will get some paint cracking, I didn't have much but I have some, I will be sanding down and putting the undercoating on the inside area that has some slight cracking. If you are going to roll the fenders do it right with a tool made for the job, you wouldn't believe the results. It does not chance the appearance of the car from the outside at all.

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post #12 of 16 (permalink) Old 06-13-2004, 08:39 PM
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How do you guys manage 285's with lowered Birds/Cats?

My Eibached Cat with Lincoln LS rims (39mm offset?) with 255's rubbed the inner wheel well where the shocks go. Fixed that with an air chisel but can't see how ya's fit bigger rubber under there.

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post #13 of 16 (permalink) Old 06-13-2004, 08:46 PM
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it's all about the offset. Your offset on the LS rims brings the rims closer to the inside of the car. The offset on those rims are really not ideal for our car, although they do work. It's all about the correct backspacing and doing things like a fender roll. As my car sits on the 17x9's with a 36 mm offset I could easily fit more rims or tire inside, although I'm pretty much as the max for the outside. Correct offset for your tire size is key. Although in front they are VERY close but no rubbing. I wouldn't change my front offset anymore otherwise the tires would either be sticking out or rubbing on teh inside.

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post #14 of 16 (permalink) Old 06-13-2004, 09:31 PM
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Well I am gonna run a 10 inch rim on the back with 315s if I keep the car ( the 92).The only thing I am gonna have to worry about is the fuel filler but since I am putting a cell in I guess I dont have to worry about that anymore.I have 275s on my 96 and they fit nicely with no worries.

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post #15 of 16 (permalink) Old 06-15-2004, 01:23 PM
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I have an 18x8 (38 offset) in the rear with a 275/40 tire, its lowered, and a sub box tht is about 175+ lbs in with no rubbing.

ps. The offset on my fronts is 42 and fits great. 18x8 and 245/40 on it.

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post #16 of 16 (permalink) Old 06-15-2004, 01:30 PM
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if you had 18x9 with that offset you wouldn't fit without rubbing the rim in front. I have 17x9's and the front rim is very clost to fitting. Like I was saying it's all about the offset.

95 LSC- Mods: 2.5 dual exhaust, 3.73s, 17x9 cobra R Rims, SCT dyno tune, MM driveshaft, 249 rwhp/ 268 ft lb tq
97 Base- Mods: Forged motor, Eaton m112, 2.76 pully, too many mods to list..........
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