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Canadian Cycling Magazine - - FEATURE -

Be­fore this trip, I had had many rides in the deep cold, but they were on a mid-’90s rigid Kona. For the jbd, we weren’t sure what setup to run – tubes or tube­less? A quick search on­line of “does tube­less sealant work at -40 C?” was no help. There’s lots out there about sealant in cy­clocross sea­son where the tem­per­a­tures are rarely as low as a balmy -5 C and where wheels are ex­posed for an hour or two at most. We were rid­ing the new­est 26" x 85-mm Wo­ven Pre­ci­sion Hand­builts car­bon wheels with 45nrth Dillinger 5 stud­ded tires. We tested our gear in the -15 C range a few weeks prior to the trek and all agreed to stick with it. The idea of hav­ing to change a flat in 30 be­low is enough to make one ill. We brought a few ul­tra­light tubes for backup, but we had zero is­sues. No burps or flats. The rims and tires were a tight match. We took air out as the days passed and the sealant stayed fluid. Ev­ery one of us started with too much pres­sure and the crash counter went up and up. Ted had the fewest, but one real beauty.

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