I was brought up with the rule that you never fully pump up brand new tyres. Pump them up to 2/3rds pressure, do a shortish (say 15 mile ride) and at that point they'll have flexed themselves into a secure position. Then you can pump them up to the hard pressure
Don't know if it actually makes any difference or the science behind it, just how I was advised many years ago
Don't know if it actually makes any difference or the science behind it, just how I was advised many years ago