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      10-10-2013, 07:00 PM   #1
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What's your tire pressure?

The sticker on my the 2013 X1 28i M-Sport driver door reads:

35 PSI Front
41 PSI Rear

That seems high, what do you guy have it at?
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      10-11-2013, 12:37 AM   #2
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38 psi @ 70-80 deg (ambient) in all tires.

I've got the same car with Pirelli summer performance 8 x18 and 9 x18 run flats.

They have very good grip wet or dry, but are very bouncy and firm on any bump.

I've tracked mine, and will definitely get a better tire like Michelin PSS or continental DW next time.

I checked pressures at the track with lasar gun and kept checking on open hwy at 75 mph.

Less than that just didn't work for me, and it will get to about 42 psi on hwy driving easy.
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      10-11-2013, 05:16 AM   #3
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Tire pressure

Quote:
Originally Posted by lookingaround
The sticker on my the 2013 X1 28i M-Sport driver door reads:

35 PSI Front
41 PSI Rear

That seems high, what do you guy have it at?
32
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      10-11-2013, 06:15 AM   #4
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I was trying to say 32 in the front and 38 in the rear. My car had very low pressure when I checked the other day 28 in front and 30 in the rear.
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      10-11-2013, 07:27 AM   #5
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I keep it at stock pressures unless I see bad gas mileage and/or unusual tire wear. So far neither, so stock.

My TPS sensor triggered at 29.5, so something like 32 would be too close to a trigger point for me as our temps can swing 30-40 deg in a day depending upon season.
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      10-11-2013, 09:08 AM   #6
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Quote:
Originally Posted by CIWS View Post
I keep it at stock pressures unless I see bad gas mileage and/or unusual tire wear. So far neither, so stock.

My TPS sensor triggered at 29.5, so something like 32 would be too close to a trigger point for me as our temps can swing 30-40 deg in a day depending upon season.
TPMS only alerts off of pressure change, so if you reset it at 32, it won't go off until around 24. Of course that's not necessarily a good thing with as heavy of a car as the X1 with such small tires.

Having said all that, I run 40/42, which gives the front tires a little quicker turn in.
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      10-11-2013, 09:22 AM   #7
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Quote:
Originally Posted by Red Bread View Post
TPMS only alerts off of pressure change, so if you reset it at 32, it won't go off until around 24. Of course that's not necessarily a good thing with as heavy of a car as the X1 with such small tires.
Yes agreed. Probably thought that was clear since I run stock pressures, but might have worded it better.
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      10-11-2013, 09:28 AM   #8
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It would be nice if you could display individual tire pressures instead of just being alerted to one being low. Most newer cars have this function so it can't be expensive to change.
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      10-11-2013, 06:09 PM   #9
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Quote:
Originally Posted by Red Bread View Post
It would be nice if you could display individual tire pressures instead of just being alerted to one being low. Most newer cars have this function so it can't be expensive to change.
My 05 CTS-V and 06 STS-V had it. Was really nice to have because you could keep an eye on known pressures and watch for slow leaks.
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