the difference between 26.4 and 27 may seem small but it takes alot of filing to make it work.
also even if you aonly use them a few times a year a nice pair of digital calipers is a great investment. I just bought a set (I have had a standard non digital set for years) at harbor freight for 18$.
I bet Tmar knows or maybe scottrider
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk