we’ve recently returned from a trip to south GA. Whenever we stopped for a bathroom break, I checked the hubs for too much heat by placing my hand on the hub. On the way down everything felt nice and cool. Did the same thing on the way home and they felt warmer by touch. What I don’t know is how hot is too hot and I don’t understand how they were cooler on the trip down.This is a 97 Coleman Taos with bearing Buddy’s. How hot is too hot. Any insight would be appreciated.