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Old 07-11-19, 06:13 AM
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Originally Posted by dabac View Post
Inch sizes are tricky. There is often several non-interchangeable ones lurking under the same - or very similar - designations.
Its safer if you can find the ISO/ETRTO millimeter size.
You HAVE to match the Bead Seat Diameter - where rim and tire overlap.
20x1 3/8 comes up as a BSD of 451 mm, while a 20x1.75 is likely to be a
406 mm BSD.
There may be others.

useful , ty
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