This update from Pat at Flatland Fuel caught my eye, check it out!
Pogs are a dropout axle adapters, which allow 3/8″ axles to fit 14mm dropouts while providing chain tension when you do not have the ability to use a regular chain tensioner.
Each set of Pogs allow 4 different chain offsets:
5/32″, 7/32″, 9/32″, 11/32″ offsets.
what’s wrong with the metric system?