Dang, I'm off the bike altogether. I just got myself a floor pump, and soon realized I haven't had properly inflated tires in about 15 years. Running at about 90 psi, I busted a spoke after four rides or so. Is there a rule of thumb regarding, or any correlation between, tube pressure and wheel lifespan? Or should a good wheel be able to take any hit from the road (provided your weight is off the saddle)? On a related note, anyone here jump curbs on 700x23 tires or similar? Is that a recipe for disaster, or, if landed smoothly does it have minimal long-term consequences to the wheel integrity?