A New Tube and Back on the Road   Leave a comment

Two weeks ago when I last rode I developed a slow leak in my rear tire. Over the last couple of kilometers, the pressure fell and the riding got increasingly difficult – but I was able to ride home. The tire did go completely flat, so it had to be repaired before I could take the bike out on the road again. On Saturday, I gave the tire a thorough inspection looking for any obvious sign of a puncture – there was nothing obvious. There were a number of grains of sand stuck in little  grooves in the almost slick tires but those would have not caused a problem. Looking closer I found probably half a dozen tiny but sharp little dagger of sand that had penetrated the tire. I pulled these out but it didn’t seem like any of them were long enough to go all the way through to the tube – especially when I had a layer of Mr. Tuffy between the tire and tube.

a tiny puncture

Next I took the tube out of the tire, inflated it and gave a visual inspection – still nothing seen. I put a little more air in the tube and very carefully inspected it, listening for any hissing. That worked, I did not have to resort to putting the tube under water and looking for bubbles. the whole was very tiny (maybe 1 mm long) and virtually impossible to note without the tire being stretched.

I patched up the hole but decided to put in a brand new tube just to be safe. I didn’t want a repeat puncture so I tried to  analyze what caused this one. It”s possible, but I think unlikely, that one of those shards of sand embedded in the tire caused the puncture. My best guess (unlikely as it seems) is that a piece of sand worked its way in through the opening at the valve stem (Schraeder valve). In any case I was cleaning out the inside of the tire and the protection strip. I didn’t notice any sand, just rubber crumbs. In any case, the new tube was mounted, tire inflated and all seemed fine.

I lubed up the chain again and headed out onto the trails and road. Today’s ride was the same 20K loop (between Dawson and Rundle Parks) that I’ve done for my last couple of outings – but today was faster. It was sunny and 14 degrees Celsius so I was able to ride in shorts for the first time. It also helped that the paths and road were very dry. With my tires at rated pressure I felt like I was flying.

There were a few places where snowmelt run-off was flowing across the path (particularly just north of Dawson Bridge. For the most part though the paths were completely dry. The bike path through Dawson Park was also surprisingly clear of sand. I do think it must have been swept recently. the main road on this route, Ada Boulevard was also very dry. It however was still very sandy. The sand basically took out the south most lane of this road but with minimal traffic this was not an issue. Even Rundle Park, which had large sections of flooded paths 2 weeks ago, was now perfectly dry.

Bridge in Rundle Park on 2011 April 24

Thawed Pond in Rundle Park

This ride was also my first opportunity to test a new point and shoot camera that I have bought, specifically to have something small that I can take with me cycling. In a future blog I’ll write more about what I was looking for, what I got and what I think about it.

As you can see from the photos, the Edmonton landscape on this last Sunday in April, has not yet started to green-up. Nonetheless we are moving in the right direction and the cycling season is young.

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