02-10-2022, 05:54 AM | #23 | |
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If you are saying that BMW engineers have come up with the absolute best compromise for what is primarily a road car, to be used across multiple continents and extremes of weather, for various skills of driver, And, that comfort, refinement and feel are potentially more important than performance, then I agree with you. The width increases we are talking here are actually very tame by traditional mod standards. With F80's its common for people to move 20mm on the front (from a 255 front) and even the factory offered anywhere from a 255 on the rear to a 285, with people going up to 305 with aftermarket wheels. That is a far greater variation than we are talking here, 20mm on the front and a measly 10mm extra on the rear on such a big tyre isn't extreme in the slightest as a percentage. Despite all that, users like myself who set their car up for the track are very comfortable with a compromise. Losing some comfort, losing some sharpness even, if it means more grip. Manufacturers don't build cars for me as I am well and truly into niche territory of their customer groups, so mods where I understand the compromises well are just part of the process. |
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02-10-2022, 06:04 AM | #24 | |
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I completely disagree with you that this has been done to death on this forum at least concerning the G8X. I read every thread on the subject and there’s very few people that have reported here different than stock set ups and I haven’t read one with a detailed driving report with someone going to 295s in the front. I can’t speak about the F8X cars. |
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02-10-2022, 10:16 AM | #25 |
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Im not usually a fan of most Vossen wheels but these look awesome. I would love a meaty setup on mine but I probably would not go that wide up front.
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02-10-2022, 11:20 AM | #26 | |
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02-10-2022, 10:36 PM | #28 | |
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Apologies if you took it in relation to G80 tyre fitment specifically as I appreciate I wasn't clear. One thing we haven't gotten into is height vs width here. I agree with you if you are suggesting height may be an issue, as I believe that will be a bigger contributor to front clearance than outter guard clearance. Honestly, I agree that the user here will have issues. He has increased width (which increases the radius) while also increasing height by 1.5%. He's likely trimmed the inner fender guard, but I don't think doing both is a good idea. FWIW, when I go to a track setup I will use a 295/30 19 which decreases the total height by 20mm. Despite the extra width it should mean only outter guard clearance is what I have to watch and once some camber is dialed in there is a lot of extra room. |
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02-11-2022, 06:43 AM | #29 | |
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A 295/30ZR19 is basically 3/4” wider and a half an inch less diameter than the stock vehicle front tire. I don’t think it’s the diameter of the wheels causing the rubbing issues but mostly the width. One of the guys that is a BMW specialty shop and a forum member and sponsor here put 285s with 10” wheels on his G80. He has lots of rubbing especially when breaking 70%. That would be catastrophic for you on the track. I’m assuming it would anyway. In the end when picking out my custom sizes as I stated in my own thread I started on the subject I’ve decided to not take any risks because I don’t want to spend 8K in new wheels and tires only to find out it’s a problem that the only fix is to eat the 8k and start over again. I could be wrong but isn’t all this also going to happen when everybody starts tuning these things? What I mean is aren’t people going to find out the hard way just how much certain stock components of the vehicle can take before failure as they increase the horsepower? I would think there’s going to be a whole bunch of “don’t try this at home people” happening. Lol |
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02-16-2022, 08:11 AM | #30 |
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There are times when the BMW folk DO get it wrong. When they left the wheel sizes alone going from the M2 to the M2C, it wasn't the right move. The rear tires weren't wide enough for the increase in power on that platform (along with staying with MPSS's instead of moving to PS4S's). I imagine that they would have had to put the M2C through additional homologation efforts if they had changed the wheel and tire sizes, and they probably had contracts for the tires that extended into the M2C days for the car.
But, the car wasn't correct on the original tire widths. It was massively easy to break the rear end loose and was missing the magic "balance" attribute. When I changed mine to 295 rears on PS4's, it was a night-and-day change. The car felt CORRECT. That being said, the G80 isn't the same situation. It's new and feels right on the original tire and wheel sizes. I'm very hesitant to change the wheel and tire size. |
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03-02-2022, 01:28 PM | #31 |
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The Rears do not fit on the front. Two pics of front strut clearance, front wheel, and rear with Michelins...Maybe a Pirelli would fit if its a touch smaller. The tire has about 3 sheets of paper clearance to the strut. I didn't even try to drive it. These are pre-camber plate pics..
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03-03-2022, 01:15 AM | #32 | |
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03-03-2022, 03:27 AM | #33 |
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Yeah, based on those inner clearance pics I was feeling pretty good about the 19x10.5 et12 square set I have on order, for 285/35/19s all around…until I read the new thread next to this one (where that same tire size also in PS4S rubs up front on a 19x10 et11).
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03-03-2022, 03:35 AM | #34 | |
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03-03-2022, 03:45 AM | #35 |
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…and I was told that et12 was a safe bet, and that’s what was suggested to me. We’re talking about mm here too, and if the other thread’s 19x10 et11 is rubbing with 285s, then 10.5 et15, 14 and 12 are all looking suspect.
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03-03-2022, 04:08 AM | #36 |
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ET12 is a safe bet, but with 275, not 285. That's what i figured so far.
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03-03-2022, 04:17 AM | #37 | |
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I’m beginning to regret ordering wheels for this car, instead of just sticking with the 826Ms and oem tires. Last edited by HorsePower; 03-03-2022 at 04:29 AM.. |
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03-03-2022, 05:28 AM | #38 | |
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03-03-2022, 06:52 AM | #39 | ||
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RSfuture put 305s up front and 325 in rear with fender flares on their art of attack m4 which would be a great setup, if it actually fit. I seriously doubt there is clearance at lock and flares are barely reaching over the tires.
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12-31-2022, 10:49 PM | #40 | |
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I actually love this looks - but am curious if this is simply a wheel / tire combo - or if spacers are also being used here. Thanks in advance to anyone who may know.
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