Hey I'm a casual road cyclist and got myself a low cost road bike a couple of years ago (Jamis satellite) and I'm happy with it but I wanted to ask about how much to inflate tyres ie the PSI. Does it really need to be 100psi? And if lower will this make punctures more likely? How do you get up to 100 psi? Do you need a special pump because with a hand pump I can only manage about 60psi. Many thanks.