19" OEM Tire Pressures
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Joined: Jul 2012
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From: Toronto
C63
19" OEM Tire Pressures
Attached are the door jam/fuel door stickers showing the inflation pressures for my '11 C63 w/ OEM 19" wheels. They are high (42/42 and 45/48 - not sure why they are showing two different standard load PSI instructions).
I have been running 43PSI all around as a compromise and I am pretty sure in the last week this car has knocked loose all my dental fillings.
If I bring pressures down to 40PSI the ride is much softer and livable. I've searched the forums and can't seem to find any consensus on what is the proper PSI for the 19" OEM wheels.
At 40PSI am I running the risk of a wheel bend? Any other problems? Should I be running at these crazy high 45/48 PSIs? I've never had a car with suggested PSI ratings so high.
I have been running 43PSI all around as a compromise and I am pretty sure in the last week this car has knocked loose all my dental fillings.
If I bring pressures down to 40PSI the ride is much softer and livable. I've searched the forums and can't seem to find any consensus on what is the proper PSI for the 19" OEM wheels.
At 40PSI am I running the risk of a wheel bend? Any other problems? Should I be running at these crazy high 45/48 PSIs? I've never had a car with suggested PSI ratings so high.
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From: eNyCe
Steel Grey Metallic C63!!
I run 39/42 cold on my 19" HRE's. It's still a harsh ride, but definitely a lot nicer than 42/45 that I was initially running. You should be fine with the slightly lower pressure if you're not fully loading your ride to mass weight capacity all the time.
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2017 Mini Cooper S Clubman ALL4 - British Racing Green
And avoid potholes.. or in my case.. the Entire City of Washington DC.. which is really 1 massive pothole :P
No really though, running lower pressure can be dangerous to both your wheels, and the safety of you and your car and everyone around you. Anyone care to remember the Ford Exploder.. I mean Explorer debacle with Firestone tires, the tires were significantly deflated by Ford to assist in stability (apparently at the original inflation specs, it was prone to rolling over on its own). Running low pressure caused the tire to basically fall to pieces. However, that was closer to 10psi lower. 2 to 5 should not be a problem, but beware wheel dings..
No really though, running lower pressure can be dangerous to both your wheels, and the safety of you and your car and everyone around you. Anyone care to remember the Ford Exploder.. I mean Explorer debacle with Firestone tires, the tires were significantly deflated by Ford to assist in stability (apparently at the original inflation specs, it was prone to rolling over on its own). Running low pressure caused the tire to basically fall to pieces. However, that was closer to 10psi lower. 2 to 5 should not be a problem, but beware wheel dings..
Thread Starter
Senior Member
Joined: Jul 2012
Posts: 293
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From: Toronto
C63
And avoid potholes.. or in my case.. the Entire City of Washington DC.. which is really 1 massive pothole :P
No really though, running lower pressure can be dangerous to both your wheels, and the safety of you and your car and everyone around you. Anyone care to remember the Ford Exploder.. I mean Explorer debacle with Firestone tires, the tires were significantly deflated by Ford to assist in stability (apparently at the original inflation specs, it was prone to rolling over on its own). Running low pressure caused the tire to basically fall to pieces. However, that was closer to 10psi lower. 2 to 5 should not be a problem, but beware wheel dings..
No really though, running lower pressure can be dangerous to both your wheels, and the safety of you and your car and everyone around you. Anyone care to remember the Ford Exploder.. I mean Explorer debacle with Firestone tires, the tires were significantly deflated by Ford to assist in stability (apparently at the original inflation specs, it was prone to rolling over on its own). Running low pressure caused the tire to basically fall to pieces. However, that was closer to 10psi lower. 2 to 5 should not be a problem, but beware wheel dings..
I guess I'm going to be the test dummy around here
Thread Starter
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Joined: Jul 2012
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From: Toronto
C63
Does anyone know why the rear tires are spec'd for higher PSI?
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2017 Mini Cooper S Clubman ALL4 - British Racing Green
You basically need to do trial and error, till the car feels just right.
side note, I only needed rears, so rather then mixing and matching tires, I picked up a second set, when these are done with the fronts as well, going back to Pzero's or going PS2
Thread Starter
Senior Member
Joined: Jul 2012
Posts: 293
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From: Toronto
C63
Try out the Pilot Super Sports - I've ran PZero's and PS2's... and these super sports are loads better.
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From: Montreal Quebec
2016 C63S, 2012 ML350
Yes, they recommend a higher psi when your hauling more passengers & also more cargo.
IMO, try different psi's but check your tread depth every so often to see if your tires are wearing evenly across.
IMO, try different psi's but check your tread depth every so often to see if your tires are wearing evenly across.
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From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
Interestingly, both stickers have a tire size on them, and neither of them looks correct . . .
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From: eNyCe
Steel Grey Metallic C63!!
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From: Melbourne
(a)'12 C63 P/P, LSD, 19" m/spoke,comfort pack. (b)Astra SRI.
39F & 41R is the minimum. If you run any less, ya're in danger of incurring excessive wear on the inside edge of all tyres (like I did!)
Cheers, Pickles.
Cheers, Pickles.
