Originally Posted by Bad Lag

Here's a good thing Schwinn did related to tires.

Somewhere around 1970, Schwinn started selling an excellent, high pressure 27X1 1/4" tire. Now, high pressure back then meant only 90 psi but relative to the 60 psi I'd been limited to, that was something. It had a central tread that was "slick" (smooth) and it had file or rib pattern tread on either side. The tread was thick enough to never worry about tire life and it helped reduce punctures to very few. The tire fit all the standard rims of the day and actually allowed 90 psi inside.

I loved those tires.