Thanks, did they ever make a later model S2? I have looked at pictures and the sprocket and design of the rim look very similar to a later model stingray.That doesn't look like a Schwinn S-2 to me, but the pictures aren't very good. Looks like a single wall rim. Here's what an S-2 looks like with the knurling and double wall. Note the holes in the inner wall at the bead seat.
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So every S2 will have Schwinn stamped on it?Schwinn made Tubular S-2's in Hungary till the end. There are many different rims that look like an S-2 but they are not Tubular and some do have the knurling on the face. I've had some Schwinn 26" S-2's that were produced in the late 70's or early 80's but they were not stamped with "Schwinn Tubular S-2". These were rolled out of tubing so double wall and there were no other manufacturers that made rims like this as far as I know. If it doesn't have the holes in the shoulder it's not an S-2.