Tire Temperature Cold vs Warm
11-20-2013, 02:03 PM
#1
Drifting
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Member Since: Jul 2013
Location: Grand Rapids area MI and Palm Coast, FL
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Tire Temperature Cold vs Warm
In the last few weeks I have read several Owners express concern about whether the tire temperature Warm vs Cold reading was accurate, since it "always" read Warm.
Here is my experience today:
Temperature when departing garage 7am:
Outside 26
Inside heated garage 50
Tires read Warm (as expected in heated garage) and stayed Warm for 40 mile trip to business meeting despite cold temperatures outside (31 degrees upon arrival at mtg)
Temperature when departing meeting location 10am:
Outside 32
Tires read Cold, as expected since the car sat in mostly shaded location in freezing temperatures.
Tires stayed on Cold reading throughout 20 mile drive to my office.
Temperature when departing office at 12 noon.
Outside 42
Tires now on Warm reading, as ambient temperature had increased to above 40 and car was sitting in the sun (albeit weak November in MI sun).
Hope this is helpful. FYI, the "Cold" tires at 10am felt a little skittish but certainly not dangerous.
Here is my experience today:
Temperature when departing garage 7am:
Outside 26
Inside heated garage 50
Tires read Warm (as expected in heated garage) and stayed Warm for 40 mile trip to business meeting despite cold temperatures outside (31 degrees upon arrival at mtg)
Temperature when departing meeting location 10am:
Outside 32
Tires read Cold, as expected since the car sat in mostly shaded location in freezing temperatures.
Tires stayed on Cold reading throughout 20 mile drive to my office.
Temperature when departing office at 12 noon.
Outside 42
Tires now on Warm reading, as ambient temperature had increased to above 40 and car was sitting in the sun (albeit weak November in MI sun).
Hope this is helpful. FYI, the "Cold" tires at 10am felt a little skittish but certainly not dangerous.
11-20-2013, 02:21 PM
#2
Racer
This from an article on the subject
Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science, but it is one that data modeling can largely overcome. And it's one more piece of information that can be utilized to enhance the driving experience.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly.
Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science, but it is one that data modeling can largely overcome. And it's one more piece of information that can be utilized to enhance the driving experience.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly.