heck i have an old 3 speed supercycle cougarII that i was starting to restore last year before my basement flooded. it had a banana seat with a fairly big 3 speed shifter on the top tube. from the looks of it, it had the original tractor grip rear tire. currently it has my modified mountain bike forks which pushes the front end up a bit higher.

 

I used to ride a fixie, rigid frame mountain bike. Frame was one of only a handful made by Bluestone for their disbanded race team that my cousin was on. The thing probably weighed all of 10lbs. Its a regular single speed mountain bike now, and is my main human powered ride.