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Because tires don't usually get that hot? https://www.caranddriver.com/columns/a-look-behind-the-tire-hysteria https://www.caranddriver.com/columns/a-look-behi

Because tires don't usually get that hot? https://www.caranddriver.com/columns/a-look-behind-the-tire-hysteria https://www.caranddriver.com/columns/a-look-behind-the-tire-... >How hot does the tire get? Typical tires experience a temperature increase of roughly 50 degrees after running on the highway for a half-hour. If it's a 70-degree day, this suggests a tire temperature of about 120 degrees. So even at 120 degree weather, you'd only expect the tires to reach 170 degrees. That's still far below the 194 that they're rated for.

briffle 9y ago
That is for passenger car/ light truck tires. These were much higher load ratings, heavier, and much, much larger. Most are inflated to 75-110 PSI, and each Tire can carry around 3600lbs (at least in the G670 that replaced it)
cavanasm 9y ago
Goodyear had test results indicating the tire would get to 225 degrees or higher when operating at 65-75 mph.
themacks 9y ago
In 100 degree weather, fairly common in the south, the road surface temperature would be significantly higher, upwards of 150 to 175.
- ChrisLomont 9y ago
  I cannot find anywhere listing road temperatures nearing 175 F. Do you have a source? Most I find are like this [1], which would allow a max road surface temp at 100F air temp at the equator with the sun directly overhead on a perfectly clear day to reach around 148F. (see equation 17 in the paper). The rest of the literature I have found is similar. I doubt roads in the US south reach 175, and likely not even 150. [1] http://www.ijirae.com/volumes/Vol2/iss8/01.AUAE10083.pdf http://www.ijirae.com/volumes/Vol2/iss8/01.AUAE10083.pdf
  - merpnderp 9y ago
    On hot days I like to take my laser temp gun and shoot roads and other things, and I've never seen anything over 140F.
    - ChrisLomont 9y ago
      Out of curiosity, what is the hottest background temps you think you've checked in? Any around 100 F ambient?
      - pbhjpbhj 9y ago
        Not parent: >Dr Howard Robinson, chief executive of the Road Surface Treatments Association, says most roads in the UK that experience a reasonable amount of traffic will start softening at 50C. >[...] >And dark road material can absorb a lot of heat. The typical summer ground temperature is higher than air temperature. Robinson says roads "regularly" reach a temperature of 50C and above. (http://www.bbc.co.uk/news/magazine-23315384 http://www.bbc.co.uk/news/magazine-23315384) // 50 deg C is 122F; but this is UK with air temps of ~30 deg C
        ChrisLomont 9y ago
        Yeah, I read that too. 30C is 86 F. The OP above mentioned a 100 degree day, 14 degrees warmer, and the formula and paper I referenced above would put the surface temp of the road would also only rise 14 degrees, to 136 F on a 100 degree day. The OP claimed 150-175 is common on a 100 degree day. No research I can find (except one single author) is anywhere near that amount.
  - mrkstu 9y ago
    Asphalt in Arizona can get as hot as 170 [0]. [0]https://gizmodo.com/5807171/phoenixs-emerald-colored-cool-pavement-will-reduce-ground-heat-by-30-degrees https://gizmodo.com/5807171/phoenixs-emerald-colored-cool-pa...
    - 9y ago

briffle 9y ago

That is for passenger car/ light truck tires. These were much higher load ratings, heavier, and much, much larger. Most are inflated to 75-110 PSI, and each Tire can carry around 3600lbs (at least in the G670 that replaced it)

cavanasm 9y ago

Goodyear had test results indicating the tire would get to 225 degrees or higher when operating at 65-75 mph.

themacks 9y ago

In 100 degree weather, fairly common in the south, the road surface temperature would be significantly higher, upwards of 150 to 175.

ChrisLomont 9y ago
I cannot find anywhere listing road temperatures nearing 175 F. Do you have a source? Most I find are like this [1], which would allow a max road surface temp at 100F air temp at the equator with the sun directly overhead on a perfectly clear day to reach around 148F. (see equation 17 in the paper). The rest of the literature I have found is similar. I doubt roads in the US south reach 175, and likely not even 150. [1] http://www.ijirae.com/volumes/Vol2/iss8/01.AUAE10083.pdf http://www.ijirae.com/volumes/Vol2/iss8/01.AUAE10083.pdf
- merpnderp 9y ago
  On hot days I like to take my laser temp gun and shoot roads and other things, and I've never seen anything over 140F.
  - ChrisLomont 9y ago
    Out of curiosity, what is the hottest background temps you think you've checked in? Any around 100 F ambient?
    - pbhjpbhj 9y ago
      Not parent: >Dr Howard Robinson, chief executive of the Road Surface Treatments Association, says most roads in the UK that experience a reasonable amount of traffic will start softening at 50C. >[...] >And dark road material can absorb a lot of heat. The typical summer ground temperature is higher than air temperature. Robinson says roads "regularly" reach a temperature of 50C and above. (http://www.bbc.co.uk/news/magazine-23315384 http://www.bbc.co.uk/news/magazine-23315384) // 50 deg C is 122F; but this is UK with air temps of ~30 deg C
      - ChrisLomont 9y ago
        Yeah, I read that too. 30C is 86 F. The OP above mentioned a 100 degree day, 14 degrees warmer, and the formula and paper I referenced above would put the surface temp of the road would also only rise 14 degrees, to 136 F on a 100 degree day. The OP claimed 150-175 is common on a 100 degree day. No research I can find (except one single author) is anywhere near that amount.
- mrkstu 9y ago
  Asphalt in Arizona can get as hot as 170 [0]. [0]https://gizmodo.com/5807171/phoenixs-emerald-colored-cool-pavement-will-reduce-ground-heat-by-30-degrees https://gizmodo.com/5807171/phoenixs-emerald-colored-cool-pa...
  - 9y ago