547 mm / 24 x 1 1/4" / Schwinn 24 x 1 3/8" S5 or S6 tires This is a size used on older Schwinn juvenile lightweights. This is not to be confused with the more common 540 mm (English 24 x 1 3/8) or 520 mm (24 x 1 1/8) sizes.
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