I'm running 205/40/17 tyres and so I decided to check my tyre pressure today.

I saw it was running at a what seems to very low 15psi!
I'm not sure what the pressure norm for low profile tyres are however I know that general tyres are at around 35 psi.

I did a test and pushed the side wall of the tyre (probably ineffective) to see how deflated it was and it seemed okay. When I pumped the tyre pressure up a bit it felt like the tyre was quite pumped so i left it at around 18 psi all round.

Can anyone confirm what the correct tyre pressure should be for low profiles all around?

I'm sure 18psi isn't the correct pressure....