Imperial tyre size to UK metric?

[EazyDuz]

Does anyone know what the tyre size below converts to in UK tyre size:

3.00S-19 4PR

Thanks
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[yen_powell]

3 x 25.4 so 76.2mm. In reality I'd be looking for a 80/90-19 or a 90/90-19
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[EazyDuz]

Is there a calculator anywhere?? It has 100/90 19 on it at the moment, is that wrong?
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[Kickstart]

Hi

Few conversion charts around. From one old one a 3.00 tyre goes on a 1.85 rim, being the appropriate size with 2.75 and 3.10 also being appropriate and a few larger sizes acceptable. A 80/90 is also the appropriate size with a 90/90 being acceptable.

A 2.15 rim would go with a 3.25, 3.50 or 3.60, or a 90/90. With a 100/90 being acceptable but a bit over size. A 2.50 rim would go with a 4.00 or 4.10 tyre, with a 100/90 being also appropriate.

On that basis it could be that you have a 2.15 rim with the current 100/90 being a touch over size (but within reason) and a 3.00 being a touch undersize (but again within reason).

All the best

Keith
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