Should we try and build some kind of chart that lists all the brands and relative hardness levels so we can compare more easily across brands? Excel sheet? Maybe in google docs so we can all contribute? open to ideas….I'm thinking it should be similar to a spring chart. I've seen the on road guys use durometers for foam tires, but I could see this being problematic with rubber tires. We'd probably have to measure before mounting without foam. Maybe we should also be measuring the inserts and charting them as well….