+1 Fuji. Mid - 80's Fuji's with Valite tubing are definitely tough bikes. So are old Schwinns & Raleighs. The most fragile bikes were the 20 to 21 pound sew up tire Gitanes, Peugeots, & Bottecchias made in the late 60's early 70's. If you hit a pot hole on one of those the frame could break.