Runflats off, standard on, but what size 18's?

[CooperS Turbo]

The time has come for the runflat's to go and new 'normal' tyres to be fitted. My current tyres are Bridgestone RE056's, 205/40/18.

Does anyone know the largest size tyre I can fit that won't rub or catch on the arch? My suspension is all currently standard.

I have used a clever little calculater tool to find what sizes would be acceptable as far as circumference goes (Tyre Size Calculator).

This shows that 215/40/18 would add 8mm; 215/35/18 would reduce by 13mm; and 225/35/18 would reduce by 6mm. The 225's are my prefered choice, all I want to know is if these will catch or rub anywhere.

Anyone any ideas please?

[MINIAC]

What offset are your wheels?

[CooperS Turbo]

Taken the plunge now, 215/40-18's fitted. NON RUN FLATS. My only problem now is that I am kicking myself..........

Have done 500 miles on these now and wish I had of fitted them so much earlier. Can now drive around and hit a small pothole without getting a broken back!

What finally made me change you ask...........

I had to meet the BMW technical manager to discuss the state of my rims and he agreed to change them under warranty. When I told him of my concerns with runflats, he told me,

"With my BMW hat on I have to advise you to refit the standard equipment, ie. Bridgestone runflats".

"Without my BMW hat on, a number of people have fitted standard tyres onto their Mini and have expressed a considerable increase in ride comfort without loss of handling or performance".

I ordered 4 new non-runflat tyres; took them to the Mini garage; they fitted them on 4 new rims; I took my Mini in and they fitted the new rims to the car.

WISH I HAD OF DONE IT SO MUCH SOONER!!!!