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Why Do 19' Rims Measure Across To 15.5'


Jordan GU

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its 19" when un flatten the wheel, e.g. if you unwelded the weld, then unrolled it it should measure to 19", What are you doing now ?

Yeah, that would be the case if 19" rims had a 15cm radius. But they're a bit bigger than that.

19" relates to the size of the wheel with the tyre of a given profile, not the actual size of the rim.

Since 19" wheels use a different tyre profile, they have the same diameter as a 20" wheel.

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