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Old 12-19-17 | 08:57 PM
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CliffordK
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There are 406 and 451 wheels.

Most of the 20x1.75 should be 406, and I would expect that on a Dahon.

But, if in doubt, measure.

I think Schwalbe makes some durable 406 semi-slick tires. Marathon, Marathon Plus, and maybe Durano or Ultremo.
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