What is the mist optimal tire pressure for around 15 to 20 celcius.
What tires? 20 char…
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Need info on Tires and class. One rule of thumb you can use is to have hot pressures not read more than two psi above cold.
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Its j125 X30 and i have a medium conpound
What brand of tire is it and what is the compound called? Usually they are named by a color or letter designation.
There are dozens of tires that could be called a “medium compound”.
The color is yellow and its a mg tire
MG Yellows your cold pressure should be between 7.5 psi - 9.5 psi depending on track conditions. Lower if it’s hotter, higher if it’s colder.
We typically stay around 8 - 9 for most conditions. Lower than 8 or higher than 9 would be for fairly extreme track conditions.
For the sake of complete info for new guy, define what Hot and Cold is, maybe.
Odd factoid: my summer pzeros have a very definite “cold” point. At 45 deg F, they start doing the “acorn” noise when turning wheel parked. This is when you know you have to be careful, really careful.
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Cold = before the session
Hot = after the session
Set your pressures before the tire is warmed up, check them after the session. You’ll want 2-3 psi of pressure increase usually, maybe more or less if you’re running nitrogen vs. air.
I mean ambient. If I read you correctly, if it’s hotter than X you deflate a bit, if it’s colder than Y, you increase pressure.
In general what’s considered “normal” operating ambient? 60-90f?
I think that’s overthinking it too much. You have a range of ambient temps you normally race in and a range of pressures to use. Fairly simple, use the higher pressure when it’s colder out, use the lower pressure when it’s hot out.
We’re talking a range of 2 psi, pretty hard to screw it up too badly.
Yeah I guess so. He can always ask around for general pressure range at his track.