Patrick, I've been running Snoqualmie Pass tires on both my Joe and my Sam. They run 42mm on DT Swiss TK540 rims and 43mm on Mavic A719s. Both rims have an internal width of 19mm, I believe, and the difference may be nothing more than the time the tires have been on the rims. I've had them on the Sam for a shorter period of time.
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