I have to say 42 might be a little high, but all tires are different...the 32-35 range seems to work for me, unless going to go around turns, then I lower them a bit....but, each to their own..just like the tmps...some like it, which I did at first, so don't, which fits me now...lol....really, I'm just too lazy to tear down a tire to replace the battery....