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Double Tubing Update
It had turned into a great day. After about 55 miles into my 95 mi.
trip I had a slight wind pushing me along and I was going to make some time. The asphalt had buckled against the expansion joints but no need to slow down or swerve. I was double tubed. The first bad bump was about 5" above the bridge deck. The front wheel came down not quiet properly aligned with the direction of motion and the water bottle flew out. I recovered the water bottle and quickly resumed riding in the same fashion. A mile later the same happened again except with a softer bounce. The water bottle stayed put. The front tire was definitely softer than when I started out. I thought, finally an opportunity to ride on one tube but it quickly became clear that _both_ tubes had pinch flat punctures. This brought up one advantage of double tubing. If the innertube rubber is pretty thick and if you shift as much weight as possible to the back wheel, you can more or less ride on the flat tire for short distances. I'll check to see if the punctures on each tube are side by side indicating that both pinch flats happened on the same bump. If not then the usage other cyclists have been recommending may hold. Once one tube goes down then inflate the other tube, at least on longer trips. Bret Cahill |
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