I've got a circa '08 Schwinn that originally came with a 7-speed freewheel. I can't remember what I broke, but I had the LBS replace the freewheel a few years back. They used an 8-speed part, because that's all they had on hand. Obviously, the gear spacing is the same, or close enough, to work with my 7-speed index shifter and derailleur (Shimano Tourney). Oh, it's coming back to me; the freewheel failed, and I had them replace the chain and crank/chainrings at the same time. Anyway, I was sitting here thinking about it, and it seems to me like all I'd have to do is replace the shifter and readjust the derailleur to fully convert it to 3x8. And, replace the brake lever, since it's integrated with the shifter. Seems like it'd be cheap and easy. Right? Am I missing something?