Hi All,
A car I've just bought has the following tyre size...
What would this size be using the normal measurement? (e.g.235/75 15)
R15 - diameter in inches.
What is the 30 for? Presumably it must relate to the profile?
Thanks,
Martin.
A 4x4 presumable.
Pretty sure this is a different standard of tyre size which doesn't equate exactly to a size in the conventional format.
Lots of 4 wheel drives use this inch based notation.
The 15 is the rim diameter, R is the speed rating.
It could be the tread diameter, but I haven't come across this notation.
IIRC it's the US way of indicating tyre sizes, in inches. I believe the 30 indicates the overall diameter of the tyre. 9.5 probably indicates the width. Measurement in inches.
Ask the question in alt.fan.landrover, the answer will definitly be forthcoming as a lot of off-road tyres come from the US market, and are so marked.
Alex
Closest would be 245/75 R15
Hi,
Thanks for all the replies. Makes perfect sense.
The tyres are on a kit car incidentally.
Cheers,
Martin.
It's a 4x4 tyre size. The 30 is the diameter of the wheel in inches. 9.5 is the width of the tyre in inches. When I had a 4x4 I used to fit
31x10.50 R15s which is a common size in large 4x4s.
Not quite
30inch is the rolling diameter of the TYRE 9.5 inch is the width of the tyre tread incontact with the road. R is the speed rating. 15 inch is the wheel rim diameterNormally tyres marked in this manner with inch sizes are X ply or bias belted.
oops, that's what I meant to say!
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