Tire fitment question

[decay]

Was there a factory bulletin and safety recall on replacing all '95 M3 tires with 225/45/17's?

Then shutup.

would they have bothered changing it if it was that good to start with?

moreover, are the diameters of the two tires in question the same?

then eat a dick.

[Mystikal]

would they have bothered changing it if it was that good to start with?

The car was too neutral. BMW ordered M to add some understeer, and they did. This was documented in just about every major publication.

moreover, are the diameters of the two tires in question the same?

They are within 3%. So by a universal industry measure, yes, they are the same diameter. Besides that, I'm doubting BMW bothered to recalibrate the M3 speedometers in '96 for a 1-2% difference anyways.

[decay]

The car was too neutral. BMW ordered M to add some understeer, and they did. This was documented in just about every major publication.

so why the move to 225/245 instead of keeping the front tires as they were and going to 255 in the rear- unless there was something undesirable about it?

anything over 1% change in rolling diameter makes me uneasy, but i guess i'm picky about stuff like this.

[Nick325is]

Does anyone have an opinion on the goodyear tires in 245/35? Having run yokos in the past i would like to stick with something I like which leaves me at 235/40.
Anymore ideas?


Thanks,
Nick

[decay]

Get 245/35/17 tires. They are exactly stock diameter and really not any wider than 235/40/17 on a 7.5" wheel, and they do not bubble out at all. What causes the rubbing with the 235's can be significantly attributed to the oversized rolling diameter.

i would like to stick with something I like which leaves me at 235/40.

seeing as you're asking for advice but ignoring the knowedgable input of everyone who bothered to contribute to your thread (whether or not we agreed with each other), i guess we can all just shut up now because you're not really listening anyway.

have fun with whatever you decide to do, and next time don't ask if you've already made your mind up.

goddamn this place is a waste of my fucking time.

[Nick325is]

Well, considering I am getting different opinions its kinda hard to make up my mind.
I asked for an opinion on the goodyears.


Nick

[Mystikal]

The car was too neutral. BMW ordered M to add some understeer, and they did. This was documented in just about every major publication.

so why the move to 225/245 instead of keeping the front tires as they were and going to 255 in the rear- unless there was something undesirable about it?

anything over 1% change in rolling diameter makes me uneasy, but i guess i'm picky about stuff like this.

Can't fit 255's in the rear of an E36 sedan with OE clearances.

[Mystikal]

Does anyone have an opinion on the goodyear tires in 245/35? Having run yokos in the past i would like to stick with something I like which leaves me at 235/40.
Anymore ideas?


Thanks,
Nick

[Nick325is]

I just pmed ryan about the 245/35s. He said the sidewalls got squishy on the 7.5s.
235/40/17 it is
Thanks for your help guys.

Nick

[bmwdude]

I just pmed ryan about the 245/35s. He said the sidewalls got squishy on the 7.5s.
235/40/17 it is
Thanks for your help guys.

Nick

Guys...Nick...listen up. It is not just the WIDTH in (mm) that dictates the minimum allowable wheel width, but also the aspect ratio of the tire itself. For example. A 235-40-17 tire is allowed to be installed on a 8-9.5 inch rim/wheel, as opposed to a 235-45-17 being safely installed on a 7.5-9.0 inch rim/wheel. You see, the aspect ratio of the tire, changes the specs slightly.

You should not therefore run a 235-40 on a 8 inch rim. ONLY if it is a 235-45-17. This is based on my Toyo spec sheet(the one dealers have).

A 235-40-17 on an e30 is a possible option(I'm looking into it myself for my very own 17 inchers that I just bough recently), but as someone said before on here, the diameter is slightly too big. A 245-35-17 would be about a stock diameter, and only 4mm wider than the 235-45 alternative, but then the issue of the front comes into play. A 245-35-17 in the front does not sound like a cozy idea, so mathematically, you would say that a 215-40-17(stock diameter) would be the logical choice for the front. 215 front, 245 rear. I think at the end of the day, if you need traction in the rear, want more neutral handling, 235-40-17 will work. Let's rember that Hartge used to sell 17X7.5 fronts and 17X8.5 rear wheels for the E30. What the hell tire sizes were they using? I seen to recall on the original Hartge brochure picture, 235's??

To conclude Nick, 235-40 series cannot go on a 7.5 inch wheel, 235-45 series can.

[/b]

[C ///M]

OK.

Everyone's "opinions" in this thread, except for Jay's, have been completely worthless and not helpful. If you have never done something, have no first hand experience with it, and overall have no idea what you're talking about, just stop talking already.

1. 235/40R17 fits fine on 17x7.5
2. 245/35R17 also fits on a 17x7.5, but isn't recommended (slightly wider, but the smaller sidewall is the bigger problem, less to give)
3. 235/45R17 is fucking huge and will NOT fit an e30
4. ES100s blow, GS-D3's are very good

Summary: search 235/40, pick tire you want, mount and balance on a 17x7.5 inch wheel with et20-25, run pretty stiff suspension with nicely rolled fenders and offset CABs, adjust fender lining if you experience rubbing in the front at full lock.

[Nick325is]

Thanks for summing things up Chris. I figured if it came stock on the 95 m3 it shouldn't be a problem.
I've got the right wheel offset, rolled fenders, and GC coilovers and konis coming in the next month so I should be fine.
Would you go with the Yoko avs sport or the GSD3?

Thanks,
Nick

[nando]

thanks, now everyone can see what a poor choice the ES100 really is.

[C ///M]

Thanks for summing things up Chris. I figured if it came stock on the 95 m3 it shouldn't be a problem.
I've got the right wheel offset, rolled fenders, and GC coilovers and konis coming in the next month so I should be fine.
Would you go with the Yoko avs sport or the GSD3?

Thanks,
Nick

The GSD3 is a better tire, but it depends on what you're goin for. The AVS sport really isn't street friendly, I mean it works just fine, but itsn't pothole friendly, isn't treadwear friendly, and its loud and transmits road vibrations more than the average tire. It is also less expensive than the GSD3. I'd personally go for the GS.

[bmwdude]

OK.

Everyone's "opinions" in this thread, except for Jay's, have been completely worthless and not helpful. If you have never done something, have no first hand experience with it, and overall have no idea what you're talking about, just stop talking already.

1. 235/40R17 fits fine on 17x7.5
2. 245/35R17 also fits on a 17x7.5, but isn't recommended (slightly wider, but the smaller sidewall is the bigger problem, less to give)
3. 235/45R17 is fucking huge and will NOT fit an e30
4. ES100s blow, GS-D3's are very good

Summary: search 235/40, pick tire you want, mount and balance on a 17x7.5 inch wheel with et20-25, run pretty stiff suspension with nicely rolled fenders and offset CABs, adjust fender lining if you experience rubbing in the front at full lock.

Tire manufactures do not all make the same exact sizes and specs. I'm not going to argue about what came on the E36. But your #2 point is contradictory and stupid. The explaination about the smaller sidewall giving less give, is absolutely NOT TRUE! Quite the contrary. Anyways, ironically, as you said, experience is what speaks in the end, and the truth evntually comes out.
I'm no E36 specialist, but there seems to be quite a bit of controversy in BMW forums on E36 tire fitments on those 7.5's. Didn't BMW change that rediculous fitment???