Joined: Nov 2005
Posts: 4,035
Likes: 2,116
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
The missing plating around the valve hole makes me think they were drilled out for Schrader valves. Back in the day, you could buy a 27 inch Schrader tube at any Kmart or hardware store, but you had to go to a bike shop to get presta valves.