While I can understand the desire to keep nice equipment nice, why do so many people use frame saver, when so few people keep their bikes for more than a few years? This seems like what many of us blast car dealers for... for pushing the undercoating when it does virtually no good for most people.

I have 7 steel framed bikes from 15 to 50 years old that have never seen frame saver, and the frames are all in OK condition. The few parts that are most corroded wouldn't be helped by frame saver anyway (rims, handlebars etc).

Has anyone actually had problems with frames rusting from the inside?

Don't get me wrong, I am seriously considering framesaver for a couple of the bikes, but I just want to know if anyone has ever had the opportunity to say "if only I had used frame saver"... I'm sure there must be a few, but how few?