10.5" inchers speak up

Have any of you guys (or gals) ran a 275/30 or a 285/30 on a 19 X 10.5" rim? I had 295/30's on but the wheel offset caused the outer part of the sidewall to rub the fender. The 275/285's having a narrower section width will help to prevent the rub, trying to get a concensus if this is a bad idea or not. Some quesitons if you have had 275-285/30's on a 10.5" wheel: How does it look, the tire to rim relation? Does it look like the rim will scrape the ground? Any adverse affects? Would you do it again? Is the tread wear pattern uneven or abnormal in the center? Did the techs have a hard time getting the bead to seat? (Pics would be nice from the rear or aft looking forward down the side). TIA Cory

what is the wheel offset on the 10.5?

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I dont remember but the wheel sticks out past the fender slightly.

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that would be a tough one... I think yoo need to look at the specs of some tire manufacturers and go with the smaller width spec. Eg I know Bridgstone has a narrow 265 width vs Pirelli... The bridgestone looked liked it was strectched on a 10" rim. I run 285/30 and it is not bad at all... in fact the 2002+ models went with this size out of the factory. So I would go with the narrowest 275/285 you can get and maybe even roll the fenders, then you might be able to get it w/o rubbing. But honestly, if the wheel is past the fenders it is the wrong offset, IMHO. GL

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Really? The factory used 285/30's on a 10.5"? That was an 18" inch rim though right?

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the factory used 285/30/18, on 10" rim....285 is the same width wether it is 10 or 10.5

COry - go to Tire Rack and find teh tire you are considering (make and model) and view the "specs" of that particular tire. The site will list the rim with range (something like 9" - 10.5") and a Measured rim width (10") which would be the optimal rim width. You will find that tires of the same size have less or more flexabiliy in rim width depending on teh manufacturer.

It's not the width of the tire you are screwing up with, it is the profile of the tire. In the 19's you need to be running a 25 series tire, NOT a 30 series. If you are trying to fit a 30 series tire and have the wrong offset on the wheel then you are going to have serious problems.

Tippy, without knowing the offset of your wheel no one can really offer you any useful or concrete advice other than opinions.

10.5" inchers speak up Way too easy...

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Catchy huh!

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Yes, you should take out an ad n the "Anything Goes" section of the Villiage Voice with that title, see what happens.

Ok guys, lets throw the offset out of the picture, it is WRONG and I know that. Cant change unless I mill the wheels or buy new ones. I am just questioning if anyone has put a 275 or 285 on a 19" X 10.5" rim and what is their opinions of using the unpreferred size. I am well aware of the recommended sizes: 295 - 10.5 285 - 10 275 - 9.5 Trying to see if I can get by with a little narrower tire.

I wanted to share a picture with you to show you where wheel offset is wrong and the owner had to compensate with going with a narrow tyre to get clearance (sorry it's not a Porsche): I know not a great shot of the wheels, but if you look at the rear one you can see that the tyre is actually hidden by the wheel. You can look and see on the front that from the bead of the tyre/rim it curves inside aggressively. IMHO it looks stupid, but I think this is an extreme situation unless the owner wanted it this way which I have to ask why Right now I have a 10" rear and running 275/30's. I can see with my clearance I can get a 285/30 and it works with a 10" wheel still. I don't want to go up to 295 unless I see after going with 285 I can. With 235 on the front on 8.5 the tyre sidewall just barely sticks out beyond the wheel lip, the rear currently, the tyre is just behind the wheel lip. So an extra 5mm will put it at the wheel lip.

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You have to do this to another man to post in the "anything goes" section.

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That is what I am looking for, thanks Steven. I do want to know if it looks terrible and how it affects handling.

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Who makes a 25 series?

You can get it in a PS2, Advan Sport, and Conti Sport. The problem you are running into is that you are trying to buy too narrow of a tire for this application. You need to run the 315/25/19 to get a 25 series tire. The problem you are running into is that the 19" 997 tire is a 26" RD and for your 996 you need a 25" RD. You could run the taller taller but you are going to change the gearing (taller....not good) in your car and run into the fender issue you are. So the question is why are you going with a 10.5" wheel in 19" for your car? Or did you already buy it?

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Yea, the ones in my avatar, I want to put them back on. On the 26" heigth, yes it killed the gearing of the car (requiring a 25" tire heigth) but it looked good to me and I got a lot of compliments, it relly filled out the wells. I will look into the 315's, thanks.

I don't quite understand what the issue is here. All GT3s (which as far as I know is the same body as all narrow body 996s) run 11" rears. In my case I run with 315/30 x 18 Hoosiers (for track) OR 295/30 x 19 Pirellis (for street) on 11" 997 Carrera S wheels. Neither hit the fender despite the fact that the car is lowered as far as it can be. If you have 10.5s that are hitting the fender then you have the wrong wheels (incorrect offset). If the question is simply that you know you have the wrong wheels but want to know whether you can fit 275 width tires on 10.5" wheels because you think that will allow you to get away with them I think the answer is yes. My previous car (01 996 C4) came from the factory with 265 width on 10" turbo twist wheels. 275s should be 10mm wider than 265s. the 1/2 inch difference between 10" and 10.5" wneels equals 12.5mm. In other words the the difference between these two arrangements is an incremental2.5mm (or less than 1/8th of inch) increase in width -- insignificant. The other way of looking at this is that the factory 11" wheels are commonly mounted with 295 width tires and you want to mount tires that are 20mm narrower on wheels that are 12.5mm narrower. the difference between these arrangements would be 7.5mm -- slightly more than 1/4" -- also insignificant. I think you would be fine.

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I tend to be too wordy. The simple question was will a 275/30 or 285/30 work on a 10.5" rim without issues (handling/stability/wear) or looking wrong (too ballooned/bead hanging out)? Has anyone had good or bad experiences using a the not so desired size?

Basically, as I see it, the offsets on Cory's (Tippy's) are incorrect for his car. These are the same wheels two other Rennlisters bought on ebay about 18 months ago and they went through these same gymnastics to try to make them fit. Have you ever tried to put a size 11 foot in a size 10 shoe? It will fit, but it is too tight. Removing your socks helps a little, but the bottom line is that the shoe is still too small. He wants to be able to salvage use of the wheels by going with a narrower tire (a.k.a. "removing the socks". Can the narrower tire work? Probably. Will they fit well and look decent? Probably not. To paraphrase an old saying "if the shoe doesn’t fit, don't wear it."

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From what I have been told is that the GT3's and NB's of the same year are the same bodies, but that is it. The suspension and everything else is different. So you may be able to fit 'x' wheel on a GT3, but that does not mean you can fit the same wheel on a non-GT3 NB. Edit: you can fit GT3 wheels on the non-GT3 NB, but the look will be different in that they may stick out or stick in further due to the offset being different because of the suspension of the 2 cars being different.

You can fit the GT3 wheels on the non GT narrow cars. This comes down to two things for Cory......1) wrong offset; and 2) too tall of a RD.

Foolproof method of ensuring the proper tires are fitted to your Porsche: 1) Read manual to find tire size recommended by real Porsche automotive engineers 2) Buy tires in recommended size 3) Mount tires on rims 4) Drive Voila! You never have to wonder if your tires "work", you know your car is safe to drive, and there are no speedometer/odometer issues.

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Dell, my mistake in that my typing was different than what my brain was thinking. I have updated my post to say that you can fit GT3 wheels on the non-GT3 NB, but the look will be different in that they may stick out or stick in further due to the offset being different because of the suspension of the 2 cars being different. I guess I am getting a little of subject here so I will shut-up now

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.... and you forgot #5! 5) Don't buy wheels with the wrong f'king offset. If you're not sure if a certain wheel will work, go to Rennlist and ask the "guys" for help. They will keep you from making a BIG mistake!

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I hate you guys . I bought these wheels before I started on this forum. Yes, my offset is wrong, but not according to the E-bay site that I bought them from (@$$ monkeys). I should of bought the 18" 5-spokes like I originally wanted. SOB, no one has chimed in with this combo, guess I am screwed . I am stuck with these wheels, I would not sell them to my worst enemy. Well, going on the milling machine tomorrow, I will get the offset I want. Dont worry, only taking off .200-.250" off the flange.

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Cory - now you know why Chuck thinks I'm a ********! OK, we forgive you since you bought the wheels before you "found" Jesu... er... Rennlist! Seriously, I mean REALLY seriously . Do you really want to trust wheels that have had 1/5" to 1/4" removed from the center hub? Stop and think about that for a minute... or a day. What if one of the wheels cracks and breaks loose. How much would it cost to repair the damage to your car? I won't even mention other cars around you or potential loss of life. Is it REALLY worth the risk? Measure the offsets and sell these to someone with a wide body car for 60% of what you paid and then get some wheels you really want. Oh, and ask us if they will fit before you plunk any money down! Get some other wheels and

You know I was considering the wheels you got but decided to get away from the 5-spoke look in the end, glad I did now. I too agree with Tim, don't mill the wheels, you can sell them (i.e. eBay), I mean I sold my chrome Imola's and they were not perfect in regards to offset etc., but someone wanted them so they bought them, it wasn't my responsibility to work out the offsets for them, that is there job, just advertise the offsets and post a picture of your car with them on, buyers will go for that. Fine Print...you did not hear the selling part from me

Tim - I have thought about this a lot, plus got 3 Engineers opinions. All said it would probably be OK. I didnt get any "absolutely nots". Steven - you probably have the best idea but this could affect my friends E-bay rating Maybe advertise for widebody only?

Just for the record -- I am pretty confident that although the suspension is different, the actual position of the wheel mounting in relation to the fender is the same between the GT3 and the standard narrow body 996 -- certainly I have run the 10" rears wheels (left over from my C4) on my GT3 (when desperate from some wet weather traction at VIR) and they looked the same as they did when they where mounted on the C4. I may be wrong as I have never actually measured both but I do not think so.

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I would be happy to know if there is a difference or not...I am going from what I was told by GT3 owners, and so I have no technical resources to show one way or another. You may actually be correct also, and this might actually come down to it being a to put GT3 wheels on a non-GT3 car. But I am sure there is someone out there that has and maybe for tracking. I am very interested in this because I will be trackin gmy '99 NB next year and do not want to use my OZ's (19's) but use 18's, so I am in the market to find teh perfect setup for my car, looks are not necessary since I will be using the wheels for tracking purposes only.

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I would advertise them like they do from the original ebay seller, I mean did you give them a bad feedback even though they did not fit exactly how you thought they would ? Be honest in your listing but you do not need to mention anything about the problems you ran into down the road, you are selling them because you are replacing them with other wheels that meet your liking now. I doubt the buyer will leave negative feedback because your listing will be truthful about the wheels and the fact that they do fit on a 996 and you will show that with a picture of them on your car, that's all you need. Would I sell these wheels this way, yes, does that make it wrong, no, you are not doing any false advertising IMHO (sorry for long response).

it's as simple as this tippy - you have wheels that are crap quality and don't fit your car. trash them, take it as a loss, live and let learn, and finally get wheels that fit your car. vw jettas and honda civics try to do this all day and some succeed some don't... just like porsche guys. unlike the econobox owners, let's hope you have the cash reserves to spend the $5K or so to get a proper wheel/tire combination for your 911. handle it, ben

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Well said, the problem is, I dont have an account. I use my friends and so I am a little hesitant.

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I can answer this one. I have a 99 996 C2 but have installed a 2004 GT3 take off suspension.... everything is the same. You can run the GT3 wheels on your C2 and vice versa. They fit perfectly because the cars are identical in relation to wheel locations. Hope this helps. -Paul

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sounds like we have a viable solution. just get the oem 18" wheels cuz they certainly are cheaper than aftermarket wheels and more easily sourced used. hey how about i start out with $1 to the Get Tippy Cool Wheels fund right here?

just to help you out more.. I have a custom set of Fikse's 17x8.5 ET 50 and 17x11 ET60 and they fit purrfect. These are for track rubber and for my purposes I wanted 17s. For the rear on a narrow body 996 the viable offsets are as follows. 18x10 ET 65 up to ET48 (that is per the factory recommendation of the stock wheel with a 17mm spacer; so 65mm-17mm=48mm with an 11 incher 18x11 ET 63 (that is the stock GT3 wheel) up to an ET 60 (which I am running). This is why I asked about offsets right up front. So if you buy a wheel that fits within the ranges above you won't have any issue except if you are at the limit with the 18x11 ET60 where a 315/30 fits but a 315/35 rubs. The other thing to remember is that whenever you are right at the limit of a tire/wheel fitting the only thing that can help it is more aggressive negative camber since that tilts the top of the wheel in and helps it clear the fender lip. The last disclamer is that the stock front lower spring perch takes up a lot of space and can cause issues unless you are running a coilover setup which uses much smaller 2.5 ID springs unlike the giant stock springs. Hope this makes sense.

Believe or not, I have a good grasp on the whole offset but the company I bought them from said they would fit a NB. I should of studied the pics a little more.

Ok, I am really confused... are these the wheels on ebay that you "don't know the offset for"? 19x10.5 ET52 Because if they are then all you need is to mount a 275/30/19 as they advertise in the company's listings and you will be fine. Now if they sent you the same wheel but in an ET45 they screwed up because that is the Boxster fitment and will never work.

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Those are the ones. Yes, the company I bought them from recommended 275's but almost every tire manufacturer recommends a 295 for a 10.5". 275's are usually for 9.5"s. That was the whole point of my OP, does a 275 or 285 "work" fine on a 10.5" rim? I needed experiences of dos and donts.

Just a couple more things and then I am done with this thread. Forgive me if this is too blunt but it needs to be black and white: 1. You bought a set of wheels that are NOT made for your car and are the INCORRECT offset. A 10.5" wheel with a et52 offset is so wrong it is not even funny. That is wide body offset. Take your factory 10" wheel with an offset of 65 and it would be like adding a 19mm spacer! Guys have tried to add the OEM 17mm spacers and it just doesn't look right nor fit properly. Heck, what you are trying to do (another example) is take a GT3 wheel and ADD a 5mm spacer! The GT3 wheels are already flush to the edge and work b/c of the aggressive setup. 2. Since you are trying to fit a square peg in a round hole, you're going to keep failing. What you are doing is analogous to golfer "playing his slice"! This is nothing more than an exercise in futility. 3. THe proper tire you should be running on that width rim is the 285/295 tires but you are going to have a heck of a time finding the correct profile. That forces you to the 315 width. Ain't gonna happen. Again, trying to fit a 30 series tire when you need a 25 with a 19" wheel is the whole square peg/round hole ignorance. 4. QUIT TRUSTING EBAY SELLERS AND COME TO YOUR RENNLIST BROTHERS FIRST!!!!!!! As much as I hate to agree with Ben, sell the damn wheels and get the proper sizes. Chalk this up to a lesson learned and unload those suckers if you can.

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Paul, see my last post to Cory. Those will NOT fit. Those wheels have far too aggressive and the incorrect RD with that 30 series rubber....over an 1"!!!!

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Hey Dell, what do you REALLY think about the fit of these wheels on a narrow body car?

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Who said they "fit"???

Ok So next time how about starting the thread with I bought some wheels that are 19x10.5 with an offset of 52. The vendor suggest a 275/30/19 on it can I / should I get away with a wider tire/taller profile? Dell: I realize these wheels are not ideal, I wouldn't buy them or recommend them to a friend... but 5mm further out than the glorious GT3 rear 18x11 ET63 is not really that big of deal provided he had say 2 degrees of negative camber. Just for illustration purposes here is a picture of a 19x10.5 with ET52 and a 275/30/19 mounted. Not my style but it is also not "all wrong" There; I've done my good deed...

$900 bux for four wheels on a 911 and they call their silver "hyper" case closed

Now, now......Dell's just a little cranked up 'cuz he's probably not getting to much sleep these days Welcome to new fatherhood

Don't make me come down there and kick you *** into the sand! ARGHHH!!!!!!!!!!!! It has taken 4 hours to watch 1 show (survivor) and the first 15 minutes of another show. But it's all good. I love that little guy

Paul, I can't imagine that he can get -2 in the rear nor want it on the street. But the whole RD is still be ignored. My work is done here All I can tell Cory at this point is "do what ya like "

Dell, agreed and just trying to help out by providing some info and ideas. I hear a baby? oh wait that's for you Dell

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Paul, that is exactly what I was looking for, a 275 on a 10.5". Like I stated earlier, I know the offset is wrong, the offset is irrelevant. I am trying to see if there are options. A 275 or 285 will clear, I am pretty positive.

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Hey, I made a mistake. "Caveat emptor"

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Lesson learned, I never liked E-bay. But, in all the irony, E-bay is the best place to help me sell them.

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See, you are learning and we, my friend, are looking out for ya! We definitely need to grab a beer on my next trip back home to SATX!

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who you kiddin', you know with no sleep comes no energy..........come bring yo best biatch!

You wouldn't hit a guy with a baby strapped to his chest in a baby bjorn now would ya?

only if you would God I hate that thing! Never feel more flaming then when thats on

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Did someone say beer?!?! Always down my friend.

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Beer always fixes these things.....Ok, 2 post about drinking beer, I must be an alky.

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Flaming wouldn't be the correct choice of wording. I think you are looking for "metrosexual" as the Baby Bjorn is a fashionable thing. You do have fashionm don't you? One day soon my friend

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No Sir.......metro's don't have kids, that bjorn thing is just plain GAY!.........(not that there's anything wrong with gay )

Don't hate the playa...hate the game yo!

word ....my nizzle true dat, true dat

peace out......

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I'm not sure if this against the rules, but could you PM or post the name of the seller you purchased your wheels from? I'm in the market, some tempting deals on ebay, would like to avoid whomever you bought from.

HT - just find the wheels you like and start a new thread asking if the wheels will fit you car. What we need is the info about your car (i.e. narrow body or wide body), and teh width and offset of the wheels, both front and rear. We can help you avoid making the same mistake as Tippy and others have made with buying "ill fitting" wheels. Oh, and as a bonus, some of us will throw in our opinion of the looks of the wheels, good or bad. This additional information will, of course, be a no cost service to you!

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Well, the original advertisement said to use 275's, I used 295's because that is what most manufacturers say to run on a 10.5" rim. If you run a 285 in all fairness, it should not rub due to being roughly an inch narrower in the section width. I was more concerned with using the plastic hub spacers, the wheels a thicker flange requiring longer lugs bolts (they did not mention), and the angle of the cones. Only the outer part of the of the lug bolt cone mated. But, the wheels were advertised on a Grey aero 996 and the picture was shot from the right rear corner facing towards the front. The wheels are Ruger RS-5's.