Rusty Klunker
Wore out three sets of tires already!
Crappy pics but, 67 CT, 62 Wasp, 82 Cruiser and a 74 HD. (2 Balloon, a cruiser and a mw).
The cruiser seat stays are as wide as a balloon the same distance from the seat post. The brake bridge is closer to the seat post on the cruiser. Cruiser doesn't have "X" stamped chainstays, also the kickstand mount appears to be 1/4 back on the cruiser.
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I always took it for granted that after they discontinued the Wasp ( last S2 frame ) all frames were middleweights, some may vary over yrs/models but none are true heavyweight 2.125/S2 frames, never really looked a the bridge on 5 speeds but know they are wider at the dropouts.
The Cruisers had S-2's. And crappy pictures from another thread but you can kind of see it in the last pic but that's a black 82 Cruiser against a 74 HD its wider. I'll have to get a better pic and measurement.