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      12-03-2018, 01:53 PM   #45
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Quote:
Originally Posted by Pimpsy View Post
Tire rack guy is asking me to confirm I want 285 squares as it isn't recommended. Certain there are no issues with this on a M5C?

At the same time, he says Sotto 2 and Sotto 3 are not compatible.

Why so complicated!? grrr...
Speed rating, unless you are planning to drive over 149mph. Lol
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      12-03-2018, 01:54 PM   #46
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Quote:
Originally Posted by Pimpsy View Post
Tire rack guy is asking me to confirm I want 285 squares as it isn't recommended. Certain there are no issues with this on a M5C?

At the same time, he says Sotto 2 and Sotto 3 are not compatible.

Why so complicated!? grrr...
I got a call too to verify that I meant to order 4 "rear" tires when I ordered the 4 Sotto 3. I said I was going to use them for fronts too and they just said okay. There was no mention of "not recommended".
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      12-03-2018, 04:29 PM   #47
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Quote:
Originally Posted by Stav View Post
I got a call too to verify that I meant to order 4 "rear" tires when I ordered the 4 Sotto 3. I said I was going to use them for fronts too and they just said okay. There was no mention of "not recommended".
I told them to ship the four 285s as ordered.
Hoping I don't run into any sort of weird fitment issue because of the competition edition being lower. Just a little nervous as I don't like mucking around outside of specs unless I fully understand the details/ramifications.

Thanks for the input.
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      12-03-2018, 05:19 PM   #48
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Quote:
Originally Posted by Pimpsy View Post
Quote:
Originally Posted by Stav View Post
I got a call too to verify that I meant to order 4 "rear" tires when I ordered the 4 Sotto 3. I said I was going to use them for fronts too and they just said okay. There was no mention of "not recommended".
I told them to ship the four 285s as ordered.
Hoping I don't run into any sort of weird fitment issue because of the competition edition being lower. Just a little nervous as I don't like mucking around outside of specs unless I fully understand the details/ramifications.

Thanks for the input.
You should be fine, I don't have CP but I did lower mine car with H&R Springs and no rubbing. You can actually put spacers too
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      12-03-2018, 07:58 PM   #49
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So given the current tire sizes, why would someone change the tire sizes from front and rear with a square set on an all-wheel drive car? I can see going slightly larger all around where the integrity of the ratio of diameters is preserved between front and rear tires. Unless you're running in 2WD all the time, this would seem to add unnecessary wear and tear on the differential.

Also, are you all switching tires on same rims or buying a whole new set of rims?
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      12-03-2018, 08:07 PM   #50
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Quote:
Originally Posted by utsteve98 View Post
So given the current tire sizes, why would someone change the tire sizes from front and rear with a square set on an all-wheel drive car? I can see going slightly larger all around where the integrity of the ratio of diameters is preserved between front and rear tires. Unless you're running in 2WD all the time, this would seem to add unnecessary wear and tear on the differential.

Also, are you all switching tires on same rims or buying a whole new set of rims?
I got square setup on stock rims.

You can buy winter setup from bmw in square or Staggered setup.
What's important is rolling diameter, width of the rims doesn't effect the rolling diameter much as long as you stay within 1/2"

Differential will be fine. I have calculated and everything is fine.
I do have quotes for summer tires and rims that stays within 1% but they are 40mm difference in width from front and back.
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      12-03-2018, 08:26 PM   #51
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Quote:
Originally Posted by utsteve98 View Post
So given the current tire sizes, why would someone change the tire sizes from front and rear with a square set on an all-wheel drive car? I can see going slightly larger all around where the integrity of the ratio of diameters is preserved between front and rear tires. Unless you're running in 2WD all the time, this would seem to add unnecessary wear and tear on the differential.

Also, are you all switching tires on same rims or buying a whole new set of rims?
Because cannot find winter 275 fronts and 285 rears that are in stock anywhere for 20" oem wheels. So instead of running summers in freezing temps I think it is better to add a bit of width to fronts.
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      12-03-2018, 08:54 PM   #52
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Quote:
Originally Posted by Stav View Post
Because cannot find winter 275 fronts and 285 rears that are in stock anywhere for 20" oem wheels. So instead of running summers in freezing temps I think it is better to add a bit of width to fronts.
Tire rack has OEM 20” fit back in stock. If you would like an exact match.
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      12-03-2018, 09:16 PM   #53
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Quote:
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Quote:
Originally Posted by Stav View Post
Because cannot find winter 275 fronts and 285 rears that are in stock anywhere for 20" oem wheels. So instead of running summers in freezing temps I think it is better to add a bit of width to fronts.
Tire rack has OEM 20" fit back in stock. If you would like an exact match.
Are you referring to the Sottozero II? The rears are special order and not in stock. That is what I was going to get but it would take about 3 weeks. I did get the Sottozero 3 from Tire Rack in the 285 size for all wheels and installing them tomorrow.
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      12-03-2018, 09:44 PM   #54
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Quote:
Originally Posted by Stav View Post
Are you referring to the Sottozero II? The rears are special order and not in stock. That is what I was going to get but it would take about 3 weeks. I did get the Sottozero 3 from Tire Rack in the 285 size for all wheels and installing them tomorrow.
I just checked now and it says in stock and I can have it delivered in two days.
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      12-03-2018, 10:12 PM   #55
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Tire Racks inventory seems to be pretty fluid. I ordered the Sottozero 2 set on Black Friday and the rears were listed as backordered until 12/8. But on Sunday night I got notification that all 4 tires shipped - and I received them on Tuesday.
If you want the 275 / 285 I recommend just ordering them and they will probably ship earlier than expected.
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      12-03-2018, 11:27 PM   #56
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Can't beat the Sotto 3 285s at $155 each!

I was going to get the Sotto S2 275s for the front anyway but the Tire Rack sales guy told me running Sotto 3 285s on the rear and Sotto S2 275s on the front was a bad idea. Probably bullshit but I decide to go ahead with 4 285s. If something seems off I'll get 275s for the front and just stash the extra rears.

I bought (practically) new 706M bi-color rims for the winter setup.
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      12-04-2018, 05:54 PM   #57
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I've ordered the Hankook tyres 275/35R20 102W and 285/35R20 104W for driving also fast in winter at the German Autobahn.
I'm not convinced but the Michelin PA4 was not available as well as the Pirelli SZ3 in both sizes and with the speed index W.
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      12-04-2018, 06:09 PM   #58
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I've ordered the Hankook tyres 275/35R20 102W and 285/35R20 104W for driving also fast in winter at the German Autobahn.
I'm not convinced but the Michelin PA4 was not available as well as the Pirelli SZ3 in both sizes and wirh the speed index W.
W.... wow nice
I miss good old times in Germany
Here in US you need to go to track or find some roads in middle off nowhere. Lol
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      12-04-2018, 09:20 PM   #59
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Quote:
Originally Posted by Stav View Post
Quote:
Originally Posted by Pimpsy View Post
Tire rack guy is asking me to confirm I want 285 squares as it isn't recommended. Certain there are no issues with this on a M5C?

At the same time, he says Sotto 2 and Sotto 3 are not compatible.

Why so complicated!? grrr...
I got a call too to verify that I meant to order 4 "rear" tires when I ordered the 4 Sotto 3. I said I was going to use them for fronts too and they just said okay. There was no mention of "not recommended".
Tires have arrived! BMW Dealer will install next week. Already mentioned square setup and they said no problem.
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      12-04-2018, 09:45 PM   #60
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Quote:
Originally Posted by johnm550 View Post
Quote:
Originally Posted by Stav View Post
Quote:
Originally Posted by Pimpsy View Post
Tire rack guy is asking me to confirm I want 285 squares as it isn't recommended. Certain there are no issues with this on a M5C?

At the same time, he says Sotto 2 and Sotto 3 are not compatible.

Why so complicated!? grrr...
I got a call too to verify that I meant to order 4 "rear" tires when I ordered the 4 Sotto 3. I said I was going to use them for fronts too and they just said okay. There was no mention of "not recommended".
Tires have arrived! BMW Dealer will install next week. Already mentioned square setup and they said no problem.
Dealer just installed the sottozero 3s for me today. So far they are excellent. No snow here but the difference in 38 degree weather vs the Pirelli zeroes is very noticeable (Zeroes are like they are made of wood during initial warmup).
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      12-05-2018, 05:33 AM   #61
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Quote:
Originally Posted by Stav View Post
Quote:
Originally Posted by johnm550 View Post
Quote:
Originally Posted by Stav View Post
Quote:
Originally Posted by Pimpsy View Post
Tire rack guy is asking me to confirm I want 285 squares as it isn't recommended. Certain there are no issues with this on a M5C?

At the same time, he says Sotto 2 and Sotto 3 are not compatible.

Why so complicated!? grrr...
I got a call too to verify that I meant to order 4 "rear" tires when I ordered the 4 Sotto 3. I said I was going to use them for fronts too and they just said okay. There was no mention of "not recommended".
Tires have arrived! BMW Dealer will install next week. Already mentioned square setup and they said no problem.
Dealer just installed the sottozero 3s for me today. So far they are excellent. No snow here but the difference in 38 degree weather vs the Pirelli zeroes is very noticeable (Zeroes are like they are made of wood during initial warmup).
Lol, mine traction light came on shifting into 3rd Until it brock down a little, now they are perfect!
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      12-05-2018, 07:14 PM   #62
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Has anyone filled their winter tire setup with Nitrogen? Pros/Cons of using Nitrogen?
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      12-05-2018, 08:01 PM   #63
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Has anyone filled their winter tire setup with Nitrogen? Pros/Cons of using Nitrogen?
I always had nitrogen in mine tires here are the reasons why.

The atom of nitrogen is a little bit bigger the oxygen, so air escapes from a tire 1.6 times faster than nitrogen.
Nitrogen also helps stabilize tire pressure that is caused by heat ( outside temperature or tracking the car ) normal air has water vapor that expends in heat, Nitrogen doesn't!
Which also helps on tire wear and gas mileage

Water vapor also can cause corrosion on steam valve or tire pressure monitor

To maximize the benefits of your nitrogen fill-up, you'll want to fill and bleed the tires several times to purge as much air as possible.
You want to maintain 93-95% nitrogen
Nitrogen in some areas can be expensive

No matter winter or summer, there is a great benefit in nitrogen as I stated above but, it will cost you a penny or two

Hope this helps
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      12-06-2018, 05:18 AM   #64
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Here's a great article on the matter with more detail:

https://jalopnik.com/heres-the-deal-...res-1795659391
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      12-06-2018, 09:44 PM   #65
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Ok had the square setup of Pirelli Sottozero 3 installed on stock rims. So far so good.
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      12-06-2018, 09:46 PM   #66
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Ok had the square setup of Pirelli Sottozero 3 installed on stock rims. So far so good.
Looking good
Just like mine
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