In West Newton Since 1952 - On The Web Since 1995

24 inch Decimal size Bicycle Tires from Harris Cyclery
(ISO/E.T.R.T.O. 507 mm)

507 mm / 24 x 1.75 / 24 x 1.9 / 24 x 2.125...

This is the size used on juvenile mountain bikes, adult BMX bikes. Most 507 mm rims will work with any of these widths.

I.S.O. Size	Traditional Size	Brand	Model	Price	Description
44-507	24 x 1.75	Kenda		14.95	Street Tread tire. Found on some adult tricycles.
50-507	24 x 1.95	Kenda	K-831	16.95	Combination tread, similar to Ritchey Alpha
44-507	24 x 1.75	Schwalbe	Marathon	TRM49 32.95	High pressure road tire. As far as we know, this is the fastest tire currently available for this size wheel. They have fairly thin sidewalls for easy rolling, but a fairly thick tread for good wear life. Reflector sidewall (no substitute for real lights, though!)
24 x Decimal Inner Tube, $4.95 Fits the tires shown above.

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