Winter tire pressure email from TireRack
01-28-2010, 12:13 PM
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Winter tire pressure email from TireRack
Hi Luke,
My door says that my winter tires on my 2005 CL55 should be 33/33. I monitor these pressures with TPMS and a German tire gauge in my unheated garage. I use V rated winter performance tires with an XL load rating (Hankook Icebear 300s) I know TR carries Hankook but not list the Icebear.
Just received an email (thank you) from TR that says I should increase the cold pressure by 6 lbs if I do high speed driving over 45 mph.
Should I increase the cold pressure to 39/39?
My door says that my winter tires on my 2005 CL55 should be 33/33. I monitor these pressures with TPMS and a German tire gauge in my unheated garage. I use V rated winter performance tires with an XL load rating (Hankook Icebear 300s) I know TR carries Hankook but not list the Icebear.
Just received an email (thank you) from TR that says I should increase the cold pressure by 6 lbs if I do high speed driving over 45 mph.
Should I increase the cold pressure to 39/39?
01-28-2010, 12:46 PM
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depends on the weather
who sent that e-mail was it the e-mail subscription / news letter?
the reason to raise the pressure is very simple
better handling ...
winter tires are very soft and flexible and need more air pressure to maintain tire stability
the reason to raise the pressure is very simple
better handling ...
winter tires are very soft and flexible and need more air pressure to maintain tire stability
Operating winter/snow tires with 3-5 psi higher tire pressure than what you’d typically run with summer or all-season tires is an often recommended tactic.
Why?
Winter/snow tires feature more aggressive tread depths and softer compounds. These provide the traction necessary on snow and ice but can reduce the responsiveness to driver input. Higher inflation pressures offset the reduced responsiveness by increasing tire stability.
And when it’s cold outside, tires run cooler and build up less hot tire pressure inside the tire. The 3-5 additional psi makes up for that drop in heat build up to maintain adequate driving pressures.
Why?
Winter/snow tires feature more aggressive tread depths and softer compounds. These provide the traction necessary on snow and ice but can reduce the responsiveness to driver input. Higher inflation pressures offset the reduced responsiveness by increasing tire stability.
And when it’s cold outside, tires run cooler and build up less hot tire pressure inside the tire. The 3-5 additional psi makes up for that drop in heat build up to maintain adequate driving pressures.
Last edited by Luke@tirerack; 01-28-2010 at 12:53 PM.
01-28-2010, 12:51 PM
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Just emailed you the missive
You'll have to look for the link in the bottom of the message.
http://www.tirerack.com/winter/tech/...sp?techid=168&
http://www.tirerack.com/winter/tech/...sp?techid=168&
Last edited by ivanj; 01-28-2010 at 12:59 PM.
