Originally Posted by
Gary Fountain
You will like the low rolling resistance of tires and tubes that will take a higher pressure. The harder the inflated tire the easier it will roll along the road.
This was definitely conventional wisdom back when this bike was made. Recently,
most agree that wider, more supple tires, at lower pressure will have at least as good rolling resistance and a much more comfortable ride. You should be able to fit ~28mm tires on a 1980 bike.
And I'm guessing those are clinchers:
