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Tyre sizes


Tony
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Working in the industry for so many years i didn't realise how complicated the tyre size must be to the public, and thinking about it i do wonder how this has evolved.

 

The current industry description for the tyre size is......

 

Example

205/65-16 which equates to "metric/percentage-imperial" or.....

 

post-2-1210694041.jpg

post-2-1210694041.jpg

 

I did that twice because the first image gets shrunk for some reason :crying_anim:

 

Some years ago Michelin and Dunlop produced an all metric tyres like "200mm/60mm-390mm" :lol: To me this reads better to the laymen don't you think?

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Ya i wondered that in the begining...

 

I would prefer all metric too, especially the % ratio bit... I never got where they were coming from with that... :crying_anim:

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  • 2 weeks later...

I can not contribute to answering the questions since I, also, do not understand how come they have so many variations, how come there is so little information as to how each dimmension affects safety, handling, economy, etc.

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I can not contribute to answering the questions since I, also, do not understand how come they have so many variations, how come there is so little information as to how each dimmension affects safety, handling, economy, etc.

 

Good question.... Loads of info regarding fitment but as you say little information relating to consequence's.

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All metric wouldn't work as wheels sizes are ALWAYS in inches. The percentage aspect ratio works in my head, but I guess it's just what your used to. At least it makes the manufactures work to a standard and not have Bridgestone making 245mm/60mm and Toyo 245mm/56mm etc.

 

An outer circumference would be useful too so you could judge rolling radius when changing widths.

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