I got to thinking the other day, which is always a bad thing, and wondered how many bike frames among the various brands of bikes are actually identical? Surely all bike frames aren't designed exclusively for a certain bike/bike company as manufacturing costs would be too high, especially for the lesser known brands or brands that don't have as much sales potential as the big boys. There must be some frames among the various companies that are identical with only different brands and paint jobs to differentiate them in the marketplace.

Does anyone know of different bikes that share the same frames? Obviously most of them share the same components.