Donut/Spare Tire

[gray85]

I had a great morning yesterday, when my tire lost all its air. Changing a tire at 6:30AM in 10-degree weather is not fun. ad Installed the spare tire and hoped and prayed that it would hold together. :eek

The question I have is how do you get a replacement tire for the donut. :confused I put in the tire size (155-80-16) into several Internet tire companies and no hits.

My second question does the cold air effect the tires (PV=nRT), possibly the seal from tire to rim?

 

[c4cruiser]

You may have to check with the dealer to see f you can get one there. It's possible that the size of the tire is somewhat generic as opposed to Corvette-specific. Those tires are not designed for any kind of extended use or even speeds above 50; just enough to get you to a place where the road tire can be fixed and re-installed.

I don't think the cold will really adversely impact the tire, but like any other tire, age will cause breakdown of the materials. Look at tires that are 10-15 years old and you usually find some cracking of the rubber especially on sidewalls. You should check the spare at least once or even twice a year for proper air pressure (60psi) and to check the rim for any corrosion.

When I bought my 87, I dont think the spare tire had ever been removed! The bolt holding the carrier was rusted and when I got the tire out, not only was there no air pressure, but the bead had become unseated and there was all sorts of dirt and grime on the inside of the tire casing. I took the tire and wheel to a local tire shop so they could dismount the tire and I wire-brushed the bead seating surface of the wheel and cleaned the tire and had it re-mounted. Also cleaned up the bolt for the carrier and coated it with anti-sieze compound.

 

[redc4corvette]

Charles Law Applies For Every One Degree Of Out Side Tempeture The Tire
Will Increase In Pressure By 5 Psi Or The Reverse!

 

[c4cruiser]

Charles Law Applies For Every One Degree Of Out Side Tempeture The Tire
Will Increase In Pressure By 5 Psi Or The Reverse!

:confused I've checked tire pressures at near freezing temps and at close to 90 degrees and never noticed more than a 1-2 degree difference. During track days, I see speeds approaching 140 and with a starting tire pressure of 36psi, after 10 laps at apeed, pressures are around 42.

Don't think Charles' Law applies to tires. http://dbhs.wvusd.k12.ca.us/GasLaw/Gas-Charles.html