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tyre heights..


Retro-gone.

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18.5mm

 

 

the 185 measurementy is the width o the treaded section of the tyre in mm and the profile is a % of this as copey said ..

 

 

and thats 18.5mm difference in the diameter so 9.5mm each side

 

so basically a 10mm difference in the height of the sidewall

 

The percentage is of the height of the sidewall, which is 18.5mm approx 3/4 inch, not 9.5mm

 

So the tyre will be 1.5" taller in total.

 

Don't forget a change in tyre size that much will alter the gearing noticeably.

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