Here is my 1980s Nishiki Aero that I recently acquired from a workmate
here in Japan, the reason I rescued the bike was the unique oval
steel tubing which it has and the chrome Ayara aero 27 x 1 3/8 rims
which are bullet proof, as when I received the bike it was in pretty
bad condition due to the fact that it was in a crash that bent the
front forks but not the front rim. After stripping the bike I decided
to rebuild it as a single speed with a 50T to a 16T free wheel on
the back. It originally was a 10 speed but once I had stripped it
down I had some new spokes laced into some Sanshin hubs and fitted
a half link BMX chain which meant I didnŐt have to fit a chain tensioner.
The most difficult part was finding a pair of 27Ó forks but its
great fun to ride and I wish I had built a single speed years ago.