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      06-15-2020, 08:24 PM   #23
dradernh
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Quote:
Originally Posted by SerenVoX View Post
Perfect explanation that explains alot. Did some research and I've chosen the Yokohama Advan A052 as my track tire.

I have two sizes narrowed down, so what would you recommend?
245/40/18 square or 235/40/18 square

The only reason I would consider the 245s is more traction. However the 235s are 1lb lighter and a more favorable tread width of 8.8" verse the 9" of the 245.

Now I know if I was RWD I would chose the 245s, but since I make up in traction being AWD would the lighter 235s be a better choice?

I could be being very nit picky and maybe this is all negligible
Which ones should I get and call it a day?
I think that's an excellent choice of tire. I've thought seriously of getting a set for the street. Watch out for standing water with that tire, whether on the street or the track.

The data I posted came from the Tire Rack's site. For the A052, you can go here, click on Specs, and scroll down to the sizes that interest you: https://www.tirerack.com/tires/tires...del=ADVAN+A052.

235/40 vs. 245/40 In the case of the A052, I'd go with the 235 because it's slightly smaller physically and it weighs a pound less. I doubt you're going to notice 0.2" difference in tread width.
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      06-15-2020, 08:45 PM   #24
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Quote:
Originally Posted by RotorOver View Post
If I remember correctly, you fit checked the 245s up front with the 18x8 wheel correct? On stock suspension? If so, do you think a 235 will fit with the 43 offset and DINAN springs/bumps?

I'm still trying to figure out what I want to do for wheels in 18".
I have a "square" set of 18x8 with 245s all around. No suspension modifications and no rubbing.

Also have a square set of 17x8 with 245s all around. No suspension modifications and no rubbing.
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      06-16-2020, 04:03 PM   #25
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Quote:
Originally Posted by SerenVoX View Post
Perfect explanation that explains alot. Did some research and I've chosen the Yokohama Advan A052 as my track tire.

I have two sizes narrowed down, so what would you recommend?
245/40/18 square or 235/40/18 square

The only reason I would consider the 245s is more traction. However the 235s are 1lb lighter and a more favorable tread width of 8.8" verse the 9" of the 245.

Now I know if I was RWD I would chose the 245s, but since I make up in traction being AWD would the lighter 235s be a better choice?

I could be being very nit picky and maybe this is all negligible
Which ones should I get and call it a day?
Even w/ RWD I would go w/ the 235's for both lighter weight and better fit on the rim. The width of the tire does not change the SIZE of the contact patch, it just changes the shape. So even with tires 2" wider, you still have the same size contact patch (it is just wider and shorter; and in your case, 0.2 inches is negligible). The fit of tire on rim is much more relevant to steering feel and turn in, but also helps overall traction - the tire does not have the free play to 'roll' over onto the shoulder as much. The advantage of wider tires is highly overstated in popular press (and these forums). The benefit is due to more rubber overall and less carcass flex; the patch is shorter, and thus each inch of circumference is only working for a shorter time and has more of each rotation to cool down (and less sidewall flex, so less heat buildup from that). This is only going to show itself under track conditions - you'll notice a change in tire brand/compound much more than these small changes in size.

Much of this is really feel, rather than true performance anyway, so it may be more important to get something you like, rather than something that has the utmost performance - not many of us are going for FTD. A simple way to get a taste of this is to run the same course/route with your tires at 3 different pressures 3# apart (e.g. 32, 35, and 38#). If you like the way the higher pressure feels, go for a smaller tire on a wider rim; or vice versa if you like the lower pressure. Our cars come w/ tires that are at the far end of this (widest tire on those rims), reportedly to give a little softer ride, but I think also for the bragging rights (same as for 20+ inch wheels, the market is driving the engineering dept).
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      06-16-2020, 08:45 PM   #26
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Quote:
Originally Posted by Maynard View Post
Even w/ RWD I would go w/ the 235's for both lighter weight and better fit on the rim. The width of the tire does not change the SIZE of the contact patch, it just changes the shape. So even with tires 2" wider, you still have the same size contact patch (it is just wider and shorter; and in your case, 0.2 inches is negligible). The fit of tire on rim is much more relevant to steering feel and turn in, but also helps overall traction - the tire does not have the free play to 'roll' over onto the shoulder as much. The advantage of wider tires is highly overstated in popular press (and these forums). The benefit is due to more rubber overall and less carcass flex; the patch is shorter, and thus each inch of circumference is only working for a shorter time and has more of each rotation to cool down (and less sidewall flex, so less heat buildup from that). This is only going to show itself under track conditions - you'll notice a change in tire brand/compound much more than these small changes in size.

Much of this is really feel, rather than true performance anyway, so it may be more important to get something you like, rather than something that has the utmost performance - not many of us are going for FTD. A simple way to get a taste of this is to run the same course/route with your tires at 3 different pressures 3# apart (e.g. 32, 35, and 38#). If you like the way the higher pressure feels, go for a smaller tire on a wider rim; or vice versa if you like the lower pressure. Our cars come w/ tires that are at the far end of this (widest tire on those rims), reportedly to give a little softer ride, but I think also for the bragging rights (same as for 20+ inch wheels, the market is driving the engineering dept).

Very informative and appreciate all the information I'm receiving in this thread. I now have a much better understanding of tires vice what I thought I knew.
TBH My first set of performance tires were the pilot super sports (YUCK). I went real big thinking just that, bigger is better. 265/35/18---235/40/18 Then again I did want to go fast at the local drag strip... Welp, I got my first taste of the circuit at Big willow and now all I've ever wanted is to build the car for the turns. I quickly bought the RE71r next and I absolutely loved them. I feel 100% grip around turns with them. I realized tho that the tire size and wheel size was important for turn in and feedback and learned my car was not as nimble and felt sluggish with those sizes. Some of the track buddies mentioned the Advon A052 being slightly faster then the RE71r. I figure Ill give them a try. I will def try the three different tire pressures next time im at the track to further fine tune what I would prefer. Thank you for the informative post
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      06-17-2020, 05:43 AM   #27
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Quote:
Originally Posted by SerenVoX View Post
.... I will def try the three different tire pressures next time im at the track to further fine tune what I would prefer.
I meant for that as a way to evaluate feel, and best done during a spirited drive on a nice curvy road - it is a rough approximation of the different fitment styles. For street driving there is a lot more latitude in acceptable pressures. On track tire pressure is another story entirely, especially with the RE's - for track use the recommendation is to find the optimum pressure and try to keep it there (on track you really only care about hot pressure, but you can learn what starting point will get you to the best place). It is good to experiment, but on track I'd aim for more like 1-2# increments.
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      01-13-2021, 07:47 AM   #28
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Quote:
Originally Posted by MerlinMc View Post
Quote:
Originally Posted by RotorOver View Post
If I remember correctly, you fit checked the 245s up front with the 18x8 wheel correct? On stock suspension? If so, do you think a 235 will fit with the 43 offset and DINAN springs/bumps?

I'm still trying to figure out what I want to do for wheels in 18".
I have a "square" set of 18x8 with 245s all around. No suspension modifications and no rubbing.

Also have a square set of 17x8 with 245s all around. No suspension modifications and no rubbing.
Do you have 40 or 35 tire profile?
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      03-10-2021, 08:16 PM   #29
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I'm running 275/35 rears!!
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      05-15-2021, 02:36 AM   #30
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Quote:
Originally Posted by _M228i View Post
I'm running 275/35 rears!!
Any modifications to the suspension? I am also considering 275 rear and 245 front.
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      05-31-2021, 05:59 PM   #31
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Quote:
Originally Posted by futurejl View Post
Any modifications to the suspension? I am also considering 275 rear and 245 front.
Yes, Im running Ksport Control pro dampening system. So it has a nice drop. They also come with front adjustable camber plates to adjust the front camber. I'm a running 235/40 in the front, so its possible it might work but it'll be a close one. The rear camber allows some wheel tuck which is awesome
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      06-01-2021, 02:07 PM   #32
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Quote:
Originally Posted by _M228i View Post
I'm running 275/35 rears!!
What offset are your rears?
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      06-08-2021, 01:26 AM   #33
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Quote:
Originally Posted by TrboMike View Post
What offset are your rears?
My offset for the rear is still OEM since I'm still running stock wheels but there is some camber so the rear wheels tuck a bit. The tires are Nitto NT555 G2 all around. For rear wheel wheels I've been looking at 18x9.5+30, or maybe +35 or so for offset.
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      06-08-2021, 11:18 AM   #34
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They mounted a 275 on an 8inch wide wheel? Wow!
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      07-19-2021, 08:48 AM   #35
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Thought I'd add to this in case someone is still looking for ideas.

I'm running a 255/35-18 square setup on Hankook RS4s for track on my 2018 M240i XDrive.
Rims are 9" wide ET40 offset.
This fitment requires a 3mm spacer on the front and 2 degrees of camber in front and back. You can get there with stock adjustments in the back but it requires camber plates in the front.
I'm on KW coilovers this year with this setup but I ran it with stock suspension last year and it worked fine. No rubbing.
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      03-06-2023, 02:34 PM   #36
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Can someone confirm it this would fit on my M235i?

8J ET30 on all 4 corners, 19" wheels.
Stock tire dimensions (225/35R19 and 245/30R19) lowered on ST XA coilovers.

Thank you in advance.
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      03-09-2023, 05:18 PM   #37
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Not sure what size tires I need

I'm looking to upgrade wheels and tires and am not sure what size tires to run. I'm currently running a catless dp and stage 2 mhd tune making (I think) a little over 400hp (haven't put it on the dyno yet). Does anyone have any suggestions?
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      03-11-2023, 09:29 AM   #38
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That's pretty pointless - that tire is way too wide for that wheel to put down the optimal contact patch in heavy cornering. Of course for straight line shenanigans it would be ok, not the best but ok.

Quote:
Originally Posted by _M228i View Post
My offset for the rear is still OEM since I'm still running stock wheels but there is some camber so the rear wheels tuck a bit. The tires are Nitto NT555 G2 all around. For rear wheel wheels I've been looking at 18x9.5+30, or maybe +35 or so for offset.
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