Thanks, wa8yxm and zippo, for the additional comments. Yes, from the research and calls he made, he deduced that there are in fact two types of “regular” cores.
However, from the tire shops he called, they aren’t necessarily based on PSI but rather how much heat they can resist. He was told that the regular ones that are used in cars usually have a black band in the middle. The ones that are rated at a slightly higher heat resistance that are recommended for trucks and buses have a red band. He said that just about all the tire stores told him there really wasn’t that much of a difference and that they all use the red-banded ones which supposedly hold up to heat a little bit better for all vehicles no matter if they are cars or trucks.
We’re still not sure if that information is correct or not because I don’t see why they’d make two types of cores. Why not just use the higher heat-resistant ones on all vehicles like the tire shop guys are saying? They said that the price is not that much different.
For standard automotive tires
For tires that run at high heat levels.
Notice how the standard one has a black band and the heat-resistant one has a red band. As you can see, there is only a 20 cent price difference
Again, here’s the ones he ordered:
Lot of 100 Valve Stem Core Heat Resistant Car Truck Bus: A100VC1 New Truck and Trailer Parts - Cargo Control: Global Parts Inc.
They are from a truck supply place so they sell to truckers. He’s hoping that they will be adequate for the RV tire.
Good advice, zippo, I’ll tell him to be sure the valve is at the bottom just in case.