Thread: 1973 Schwinn College Sport
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Old 06-07-18 | 05:20 AM
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Pompiere
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From: NW Ohio

Bikes: 1984 Miyata 310, 1986 Schwinn Sierra, 1987 Ross Mt. Hood, 1988 Schwinn LeTour, 1988 Trek 400T, 1981 Fuji S12-1977 Univega Grand Rally, S LTD, 1973 Sears Free Spirit 531, 197? FW Evans

A Schwinn will most likely have an S6 26x1 3/8 inch with a 597 mm bead seat diameter. This is NOT compatible with either 26x1 3/8 inch, 590 mm bead seat or 26x2.5 inch, 559 mm bead seat.

This article attempts to explain it: 26 Inch Bicycle Tires
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