How old is your Schwinn Cycle truck? Earlier models (Pre 48) used drop center wheels, as the S-2 had not been implemented. 48 to somwhere around early to mid 50's models used painted S-2's. Later models would have used a chrome plated S-2 wheel.And most would have been laced with H.D. spokes (105 GA.) Seems to me there were many vaiables left over looked. :wink: