So far I've yet to hear of anyone having a tire pressure related blowout on a 14" or larger tire that can be attributed to tire pressures. I've heard of a few guys on 13's having problems with sky-high pressures, but 13's tend to be pretty flimsy compared to larger 14 and 15" tires. You should be able to run 44psi without any problems. That's what I run in my car, and what many others do as well. It's good for about 3% higher FE in steady-state cruising than 35psi based on my testing.