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      08-14-2020, 03:48 AM   #23
Kr0m3assass1n
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Originally Posted by lior View Post
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Originally Posted by patchesj View Post
Is this with traction control in MDM or all the way off?
traction control fully on [ still affraid to turn it off\partially off due to these tires i have now] car is in the sportiest settings besides the traction. but i do not see any intervention in the dashboard that the traction control kicks in.
you think it has something to do with it?
Turn MDM mode on, it's a completely different animal.

One should avoid using it in rain or on slick surfaces, as it does allow one to get into trouble.
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      08-14-2020, 03:49 AM   #24
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Originally Posted by lior View Post
305 rear 275 front's ps4s ordered, thank you so much guys!

Was wondering something, Could a linear power delivery when accelerating have something to do with the tires?
i just recently bought the car and the tires it came with are some cheap crap Chinese with 0 traction [literately].

When i accelerate hard [no matter from what speed] you get this uneven and not smooth power delivery its like the engine is tuning itself down on purpose [ and no its not traction control ]
i did coils \ plugs last week issue still there.
some guy in the m5 forum said it could be maf\o2 sensor i will try that out but i was wondering if the tires could have anything to do with it?
Excellent. Please take before/ after pictures especially showing side and rear quarter profiles of the wheels as I am interested in going your route too.

Appreciate it and hope it all works out well for you! Cheers!
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      08-14-2020, 06:29 AM   #25
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Quote:
Originally Posted by Kr0m3assass1n View Post
Turn MDM mode on, it's a completely different animal.

One should avoid using it in rain or on slick surfaces, as it does allow one to get into trouble.
Exactly. With all of the driver aids turned on it's just about impossible to lose traction, that is absolutely what you are experiencing. The car is pulling back everything to keep the motor from making power because brake pulses aren't going to keep those tires on the ground by themselves in these cars.

MDM is going to let you have some spin, but my guess is if your tires are really that bad you are going to still run into some limiting. Keep it on a straight road and you should be fine. It is amazing how controllable the cars stay in MDM.
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      08-25-2020, 02:56 PM   #26
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your back brakes will be gone every 15k miles due to traction control. Also, I'd be very wary of turning TC all the way off. These cars can spin very quickly if you're not used to it
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      09-01-2020, 04:32 PM   #27
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Bought the car with 255/30/21 in 295/30/21 in the rear. Gives it a stretched look, will raise the car and switch to 315 or 305 as soon as I can.
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      09-24-2020, 04:03 PM   #28
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Sorry to thread jack,
I'm a long time lurker first time poster, and forgot my other accounts email password so made new account.
I have a 14 M6 GC CP with CCB's & 343M wheels. I'm looking to replace the tires and couldn't find the tire combo/size using the search bar.

Will this setup work on the wheels i have? Vehicle has no mods and is not lowered.

295/35/20 - Front
305/35/20 - Rear

35 in the rear is tall but will it work? also the front being 295 on the stock wheels, will that work? Thank you in advance for all the help.
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      09-24-2020, 06:14 PM   #29
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front rims are too narrow for 295/35/20. You might also have trouble with the stability control. The standard ration front over back rollings ratio is 0..988 whereas what you you are looking at is 1.01 that is very close to the 2% limit.
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      09-24-2020, 06:21 PM   #30
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Quote:
Originally Posted by arucano View Post
front rims are too narrow for 295/35/20. You might also have trouble with the stability control. The standard ration front over back rollings ratio is 0..988 whereas what you you are looking at is 1.01 that is very close to the 2% limit.
Thank you for your input and information, i appreciate that. I thought so about the front wheel being too narrow. My next option tire size is as follows:

275/35/20 - Front
315/30/20 - Rear

Now, would 315 be ok for the rear? Im not looking for tire blow outs.
According to the tire manufacture, the tire requires a wheel width between 10.5" - 12". I know these wheels are 10.5" wide but i would like some input regarding this please

thank you
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      09-24-2020, 06:36 PM   #31
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The 305 /30 fit. Have not tried 315 but someone else might be able to chime in. There are several discussions on tire sizes on the forum. Did you have a look to see?
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      09-24-2020, 06:56 PM   #32
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Quote:
Originally Posted by arucano View Post
The 305 /30 fit. Have not tried 315 but someone else might be able to chime in. There are several discussions on tire sizes on the forum. Did you have a look to see?
I Did see only 2 people mention then fit, so not enough evidence in my opinion.
Also the ratio with the front tires i suggested, are those ok? for that 0.988 you were talking about? thats my main concern. that 1/1 ratio tolerance... I'd prefer not having any malfunction messages lol
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      09-25-2020, 03:32 AM   #33
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Quote:
Originally Posted by limitless831 View Post
Quote:
Originally Posted by arucano View Post
The 305 /30 fit. Have not tried 315 but someone else might be able to chime in. There are several discussions on tire sizes on the forum. Did you have a look to see?
I Did see only 2 people mention then fit, so not enough evidence in my opinion.
Also the ratio with the front tires i suggested, are those ok? for that 0.988 you were talking about? thats my main concern. that 1/1 ratio tolerance... I'd prefer not having any malfunction messages lol
Why don't you just find the "normal" size tyres 265/35x20 front and 295/30x20 rear (or 305/30x20 - that's what I'm running)? It's not as if you can't buy MPS4S in this size...
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      09-25-2020, 08:56 PM   #34
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Quote:
Originally Posted by MelbourneFinn View Post
Why don't you just find the "normal" size tyres 265/35x20 front and 295/30x20 rear (or 305/30x20 - that's what I'm running)? It's not as if you can't buy MPS4S in this size...
Because the stock type tires can’t hold grip to save their lives lol was going with Toyo R888R’s or Nitto NT01’s
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      03-14-2021, 11:28 AM   #35
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Quote:
Originally Posted by patchesj View Post
I agree with MelborneFinn, except I would go 275 front if you are going 305 rear. The rolling diameters are closer between front and back if you go 275 and 305.
Reviving an old thread --

patchesj Can you post a side profile photo with the 305/30 rears and 275/35 fronts?

Trying to get an idea of how much beefier the 275/35 sidewalls look up front versus 265/35 stock. I'm ordering my summers this week (Michelin PS4S) and this is the only variable I'm unsure on. Definitely going 305/30 rears, I just want to visually see the two rolling diameters next to each other before pulling the trigger on 275's for the front

Bonus if you're able to provide the true height measurements of the sidewalls given the different aspect ratios and widths. Using the math for how aspect ratio is calculated, the 265/35 should actually be closer in sidewall height to the 305/30 rears than the 275/35 (91.5mm rear and 92.75mm front versus 91.5mm rear and 96.5mm front respectively). Below are Tire Rack's measurements for the sizes in question, and the overall diameter is closer for the 265/305 pairing, but I know real measurements can be different too.

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      03-15-2021, 09:38 AM   #36
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Originally Posted by LJohnson32 View Post
Reviving an old thread --
Check out this calculator http://www.rimsntires.com/specspro.jsp
Attached Images
  
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      03-15-2021, 10:42 AM   #37
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Quote:
Originally Posted by HeyKC View Post
Check out this calculator http://www.rimsntires.com/specspro.jsp
Thanks for sharing -- plugging in the info corroborated the info I shared above that the 265's are much closer in overall diameter and sidewall thickness to the 305 rears than the 275's. Looks like that will be the route I will go.
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      03-18-2021, 11:25 PM   #38
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Quote:
Originally Posted by LJohnson32 View Post
Quote:
Originally Posted by HeyKC View Post
Check out this calculator http://www.rimsntires.com/specspro.jsp
Thanks for sharing -- plugging in the info corroborated the info I shared above that the 265's are much closer in overall diameter and sidewall thickness to the 305 rears than the 275's. Looks like that will be the route I will go.
Please let us know how you like it and if you had any problems with your set up(also looking for 265/305 for this season was running stock but like everyone had traction issues)
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      03-20-2021, 10:03 PM   #39
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so i have spacers on 2016 m6gc and i was wordering if i can go:
275/35/20 with 10MM spacers on the front
305/30/20 with 12MM spacers on the rear
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      03-24-2021, 07:39 PM   #40
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Quote:
Originally Posted by 2016 M6GC View Post
so i have spacers on 2016 m6gc and i was wordering if i can go:
275/35/20 with 10MM spacers on the front
305/30/20 with 12MM spacers on the rear
I'm not sure you need spacers. 2014 M6GC CP CCB here.

I went ahead and bought the Nitto NT01 315/30/20 for the rear and run them no problem without spacers, no rubbing or anything.

I did do a full balance and and complete alignment and had the camber changed a little too, since bmw cambers them for turns/cornering, and i needed more grip than anything.

BM3 91oct stg 2 tune, catless DP's, 2 step colder plugs gapped .028

no grip in 1st. Grip in 2nd with a fully loaded car of people, without people somewhat grip, tires spin, unless im on a nicely paved road, spinning becomes minimal and it pulls like a freight train.
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      03-15-2022, 02:22 PM   #41
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Quote:
Originally Posted by 2016 M6GC View Post
so i have spacers on 2016 m6gc and i was wordering if i can go:
275/35/20 with 10MM spacers on the front
305/30/20 with 12MM spacers on the rear
Reviving an old thread here but I just had 275 /305 P4S fitted to the car. It is a 2018 GC lowered about .6 on Dinan Sleeve Kit. I had a 10MM front spacer fitted with the stock PZeros without a rub. The 275 rubbed SLIGHTLY on the plastic on the rear of the fender well. I could have heated it and pushed it out of the way, but decided instead to remove the spacer. Still looks pretty flush with the extra 5MM of tire. I left the 12MM in the rear which is effectively 17mm wider than stock (12MM spacer + 5MM tire).

My .02. As always, YMMV.
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      03-18-2022, 01:33 PM   #42
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Quote:
Originally Posted by atillathetom View Post
Reviving an old thread here but I just had 275 /305 P4S fitted to the car. It is a 2018 GC lowered about .6 on Dinan Sleeve Kit. I had a 10MM front spacer fitted with the stock PZeros without a rub. The 275 rubbed SLIGHTLY on the plastic on the rear of the fender well. I could have heated it and pushed it out of the way, but decided instead to remove the spacer. Still looks pretty flush with the extra 5MM of tire. I left the 12MM in the rear which is effectively 17mm wider than stock (12MM spacer + 5MM tire).

My .02. As always, YMMV.
how is your traction??any mods?
if you can share by gears like previous post.
Thinking to buy PS4S 305/30/20 or NT 315 cant chose yet since I'm running st2 for my M6
thank you.
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      03-21-2022, 02:10 PM   #43
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Not to hijack but I have a similar question. I might come across as a total noob here because I know we all should want shorter sidewalls, but I live in North Jersey and the roads are awful. I also occasionally drive in to NYC where the roads can also be quite awful.

When I got my F06 M6 last November it had P-Zero 265/35-20 fronts and 295/35-20 rears. That wasn't a typo on the rears, they were also 35s.

When I got winters I opted for taller sidewalls and went with Sottozero 245-40/20 fronts and 285-35/20 rears. I already knew the car had no issues with 295/35 in the back and so the smaller width for winter fits just fine. The ride is comfortable, and for winter this seemed like a good decision.

Now I am looking at summers and am having trouble deciding what size to get. I want to get PS4S 305s for the rear and 275 for the front, but the question is should I get 305-35/20 and 275/40-20 to have taller sidewalls to better negotiate all of the potholes that are everywhere, or should I stick to 305-30/20 and 275-35/20.

The 295/35-20s rears that came on the car were 4.1 inch sidewalls on the top and the bottom. 305/35-20 would be 4.2, so I think it will fit without a problem.

The question is whether there are other F06 owners out there in North Jersey (or other pothole filled regions of the world) who have had a lot of trouble with ride quality and/or flats running 305/30-20s in the rear.

And I guess a follow-on would be if there are any F06 owners out there with 305/35-20s in the rear (maybe not!!) who think they made a bad cosmetic decision going with such tall sidewalls.

Any advice would be greatly appreciated!

I can follow up with some pictures of the 295/35-20s and my current 285/35-20s if that would be helpful.
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