Modified 1961 Superbe
As I’m no longer 25 years old, I’ve been thinking about gearing on these old bikes.
Delivered from the factory, they commonly had a 46T or 48T chain ring mated to an 18T rear cog. The gearing tends to be “tall” with third gear only being usable on level ground or downhill. Swapping out the rear cog is a simple chore. Cogs are available in 18T, 19T, 20T, 21T and 22T.
The only drawback is that a bigger cog on the back will mean a new chain as well.
The bike above now has a 20T cog and a new chain.