i just keep throwing more money at upgrading Bear, soon he will be a brand new bike. but next on my list is replacing the rear air shocks, which i have wanted to do for a while now anyways, never was a fan of them, and they are starting to go and not hold air overnight. so, wanted to upgrade to spring style shocks. i have found a few posts about it, but none answered my question, how do you measure shocks? I know they are adjustable on most of the ones i have been looking at, but want to know how to measure a shock, is it end to end? is it top or spring to bottom of spring? is it mounting point to mounting point?