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Tyre sizing help needed please

I currently have 185/65R15 tyres on steel wheels on my Saab 900.

I've got some Saab alloys that currently have 205/50R16 tyres on them, which I assume will be ok, since on Saab wheels from a 900.

I also have some tyres that are 205/55 R16 which have good tread that I could replace on the Saab alloys.

Question is - does anyone know of a calculator on-line so that I can compare the diameters etc?

Also, does anyone have any larger profile tyres on Saab 16 inch alloys? I am seeking comfort and ecomony much more than handling etc, so larger profile tyres 205/60 or 205/65 would be ideal, but obviously they could scrape on the wheel arches or suspesion etc if they are too big.

Any thoughts and help please?

Thanks. Rob

Reply to
Kalico
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Kalico ( snipped-for-privacy@kalico.spam) gurgled happily, sounding much like they were saying :

The only things you need to know are :-

The profile (65) is expressed as a percentage of the tread width (185mm). There are 25.4mm in one inch.

You may find spreadsheets.google.com helpful if you don't have a spreadsheet installed on your computer.

Reply to
Adrian

Kalico wrote: || I currently have 185/65R15 tyres on steel wheels on my Saab 900. || || I've got some Saab alloys that currently have 205/50R16 tyres on || them, which I assume will be ok, since on Saab wheels from a 900. || || I also have some tyres that are 205/55 R16 which have good tread that || I could replace on the Saab alloys. || || Question is - does anyone know of a calculator on-line so that I can || compare the diameters etc?

This any good to you?

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Reply to
Rob

Absolutely brilliant. Thanks a million.

How likely is it that an increase of say 10-15mm will scrape on the wheel arches, do you know?

Rob

Reply to
Kalico

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Mathew

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Mathew Newton

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Fred

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