c400 19" run flat tires pressure for snow
Thread Starter
Junior Member
Joined: Oct 2019
Posts: 34
Likes: 1
From: Hudson, Ma
Lunar Blue Sedan 2015 C400 RB25DET powered 1998 Nissan 240x S14 2006 Nissan 350z Drift Spec
c400 19" run flat tires pressure for snow
Hey guys,
The factory oem tire pressure for the 19" run flats is too high. 39psi front and 44 rear. The car would not stop on snow, it's really dangerous.
What you guys run for tire pressure with the run flats on snow?
Thanks in advance.
The factory oem tire pressure for the 19" run flats is too high. 39psi front and 44 rear. The car would not stop on snow, it's really dangerous.
What you guys run for tire pressure with the run flats on snow?
Thanks in advance.
Thread Starter
Junior Member
Joined: Oct 2019
Posts: 34
Likes: 1
From: Hudson, Ma
Lunar Blue Sedan 2015 C400 RB25DET powered 1998 Nissan 240x S14 2006 Nissan 350z Drift Spec
Thread Starter
Junior Member
Joined: Oct 2019
Posts: 34
Likes: 1
From: Hudson, Ma
Lunar Blue Sedan 2015 C400 RB25DET powered 1998 Nissan 240x S14 2006 Nissan 350z Drift Spec
They are continental contisportcontact ssr's.
I probably need to buy a new set of wheels with snow tires. But that would make the tpm lights come on right?
Super Member
Joined: Dec 2016
Posts: 797
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2018 C43
Conti sport contacts are summer only tires. You need dedicated winter tires to be safe when driving in cold and snowy regions.
If you don't want tpms for winter rims and tires, you won't get the pressure readings. If you don't have the readings nor metal valve stems, you might have abs tpms reader instead which mean you don't need to buy tpms.
If you don't want tpms for winter rims and tires, you won't get the pressure readings. If you don't have the readings nor metal valve stems, you might have abs tpms reader instead which mean you don't need to buy tpms.
Last edited by stockbmw; Dec 10, 2019 at 01:32 PM.
Senior Member
Joined: Jun 2015
Posts: 256
Likes: 26
From: Dutchess County, NY
2016 C300 4matic
Exactly what stockbmw said. You don't want to be driving in New England weather with summer tires. It's likely to get you injured or your car wrecked.
I bought a set of wheels and dedicated snow tires from TireRack for a decent price. The TPMS isn't an issue with our cars. When you mount the new wheels once you start driving the car will recognize the new TPMS values and from your dash you can tell the car to use those as the new TPMS data. Some other cars require some level of reprogramming, ours don't.
I bought a set of wheels and dedicated snow tires from TireRack for a decent price. The TPMS isn't an issue with our cars. When you mount the new wheels once you start driving the car will recognize the new TPMS values and from your dash you can tell the car to use those as the new TPMS data. Some other cars require some level of reprogramming, ours don't.
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Thread Starter
Junior Member
Joined: Oct 2019
Posts: 34
Likes: 1
From: Hudson, Ma
Lunar Blue Sedan 2015 C400 RB25DET powered 1998 Nissan 240x S14 2006 Nissan 350z Drift Spec
Thanks for all the patience guys. I thought I had all seasons because of this car being a sedan and not a sports car. I will look for a set of wheels and install a dedicated snow tires.
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Joined: Sep 2017
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From: Central Oregon USA
2017 C300 Cab 4Matic
Senior Member
Joined: Jun 2015
Posts: 256
Likes: 26
From: Dutchess County, NY
2016 C300 4matic
Also, bcnr33hideaki, I don't know if you have a staggered wheel setup but if you buy new rims for your snow tires you don't have to run staggered during the winter. It may be cheaper not to. I run all the same size 18s during the winter and swap my staggered wheels back on in the summer. I've had absolutely no issues over three winters. Just use the same pressure on your front and back tires.
Newbie
Joined: Jun 2016
Posts: 5
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C450 AMG
I did the same with my C450. Went square on the snow tires rather than staggered.
Run flats at >40 PSI means no stopping at all on ice.
These tires are dangerous in the winter when the temperature drops below 40F / 5 C
Run flats at >40 PSI means no stopping at all on ice.
These tires are dangerous in the winter when the temperature drops below 40F / 5 C
