Something I learned long ago... before every ride, I check my tires. The hand pressure test is just not accurate espceially if you run your tires at 100 psi like I do. Properly inflated tires will prevent pinch flats and other problems plus the bike will roll better. I have a floor pump I keep inthe garage and another is kept in the car so no excuses! Also... and yes I learned this the hard way... always remember to tighten up the stem valve after filling your tires.