[Richard]

look at the door sticker which gives you the recommended tire pressure.

I’ve already looked at the door and it said 36 PSI. Thanks for your reply.

 

[t.mazda]

The recommended tire pressure for the cx30 is 36PSI

mine came set at about 45 and the ride was stiff and felt every bump.

Down to 36 now (cold) and about 39 (when warm)
much better ride now.