difference in tire pressure cold/hot
Ultimate HDF Member
Joined: Apr 2010
Posts: 7,138
Likes: 26
From: Southern Oregon
Your tire psi should increase 10% when hot. If it increases more than 10% its too low, less than 10% its over inflated. Yes, there are a lot of variables from weight, ambient temp, altitude etc... This is just a good basic rule that has always worked well for me
Stellar HDF Member
Joined: Aug 2009
Posts: 3,212
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Right on. This is the easiest way if you aren't a factory rider with data logs and pressure monitoring systems.
Seasoned HDF Member
Joined: Jan 2011
Posts: 28,842
Likes: 16,582
From: Wisconsin, USA
According to Goodyear, it changes 1-2 degrees F for every 10 degree change in temperature. I would say on a motorcycle it is about 1 lb/ every 10 degrees.
http://www.goodyear.com/cfmx/web/cor...y.cfm?a_id=371
In WI, temp can easily be in 40s at 6 am, high 70-80 by afternoon. Never noticed more than 4 psi difference.
If you are just going with same ambient temp, and cold/hot operating, I agree with the 10% posted earlier.
http://www.goodyear.com/cfmx/web/cor...y.cfm?a_id=371
In WI, temp can easily be in 40s at 6 am, high 70-80 by afternoon. Never noticed more than 4 psi difference.
If you are just going with same ambient temp, and cold/hot operating, I agree with the 10% posted earlier.
Tourer
Joined: Jul 2012
Posts: 284
Likes: 12
From: Eugene, Or / Sammamish, WA
All right now a question about hot tire pressure. I've got my cold pressure set at 36/40 with a calibrated gauge and my on board Fobo tpms. When I was riding this last weekend, 50 deg in morning, it was ok. Then as the day warmed to 75 rear tire temp was running 90ish and 49 psi. There are summer days when we are 80-95 ambient temp and who knows how hot the tires will get. What is too much pressure or when should I be concerned?
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,166
From: SE Michigan
All right now a question about hot tire pressure. I've got my cold pressure set at 36/40 with a calibrated gauge and my on board Fobo tpms. When I was riding this last weekend, 50 deg in morning, it was ok. Then as the day warmed to 75 rear tire temp was running 90ish and 49 psi. There are summer days when we are 80-95 ambient temp and who knows how hot the tires will get. What is too much pressure or when should I be concerned?
neuˇroˇsis
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nounMEDICINE
a relatively mild mental illness that is not caused by organic disease, involving symptoms of stress (depression, anxiety, obsessive behavior, hypochondria) but not a radical loss of touch with reality. Compare with psychosis.
synonyms: mental illness, mental disorder, psychological disorder; More
(in nontechnical use) excessive and irrational anxiety or obsession.
n(y)o͝oˈrōsəs/
nounMEDICINE
a relatively mild mental illness that is not caused by organic disease, involving symptoms of stress (depression, anxiety, obsessive behavior, hypochondria) but not a radical loss of touch with reality. Compare with psychosis.
synonyms: mental illness, mental disorder, psychological disorder; More
(in nontechnical use) excessive and irrational anxiety or obsession.
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Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
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From: Mountain West, Big Sky Country
I agree with this, i run 40/40 cold and if checked warm typically 44 or 45.
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Road Warrior
Joined: Feb 2013
Posts: 1,625
Likes: 123
From: Meridian, Idaho
Don't forget to change the air in your tires for the fall, and winter seasons.
http://kalecoauto.com/index.php?main...BQFRvQumdn7On0
Also Check that blinker fluid so it stays fresh.
http://kalecoauto.com/index.php?main...piQL5u9f5Q8r51
http://kalecoauto.com/index.php?main...BQFRvQumdn7On0
Also Check that blinker fluid so it stays fresh.
http://kalecoauto.com/index.php?main...piQL5u9f5Q8r51
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
Nitrogen tire fill is less affected by temperature or altitude variations.
the larger molecules are less able to work through rubber so will stay inflated to spec longer
mike
the larger molecules are less able to work through rubber so will stay inflated to spec longer
mike
Last edited by mkguitar; Sep 30, 2015 at 03:04 AM.