Occasionally, as those of you with a number of riding options in the garage will attest, one or two of your bikes will hang unused for some bit of time. Since part of my job is riding the new stuff and gathering personal data on what works with what, how it fits, what it does, etc., often it will be an older Surly model that hasn't had my attention. Sometimes a bike sits forelorn due to a mechanical problem that has gone unfixed. You know how it goes, "Which bike will I ride today? The one with air in the…