I usually run about 17psi in front and rear, varies by what sort of mood i am in To avoid punctures I from past experience believe it is so much down to what tube you run. I had a standard tube back in the day when I had an onza abd it popped all the time, but fitted a cheng shin more heavy duty type tube and in about a year or so have not had a single puncture!!! also it somehow made it feel bouncier. It may hurt your wallet now but in the long run it pays off to buy quality first!!!