hrj (
hrj) wrote2025-09-29 11:02 pm
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Bicycle Tires
I have this mental block about actually "fixing" leaky bicycle tubes. Swap in a new one and move on. But tubes aren't exactly cheap (especially since both my regular bicycles have odd size wheels and I have to mail order), so the last several flats I've kept the tubes, meaning to patch them. Eventually.
Last week I had a flat on the right front of the tricycle, removed a small thorn from the tire, and put in a new tube. That made three leaky tubes waiting for a fix. This morning, the same wheel was soft, so I assumed I'd missed the actual culprit. Figured this was my cue to actually patch all the tubes, so I filled up the kitchen sink to locate the leaks. The three older tubes had clear leak sites, though the most recent of those was very small and slow.
But I couldn't find any leak in the newest tube. I suppose it's possible I didn't have the valve tightened completely and it was leaking slightly through the stem. (The tricycle uses Presta valves.) So I checked the tire carefully for possible causes and put it back on. We'll see tomorrow if it's gone soft again. Which would be annoying.
But at least I've gotten a bit more practice in getting the tire on and off, which requires a high level of believing that it can be done plus significant hand strength. (The front wheels on the tricycle can be worked on without removing them from the frame. The rear wheel is...more complicated. But not quite as complicated as the rear wheel of the Brompton fold-up, which involves a lot of keeping track of which small item goes where.)
Given how many miles I put on the bike, I probably have a relatively low rate of flats. I got heavy duty tires because the rec trails have some vegetation hazards. (Star thistles can serve as surprisingly functional caltrops.) Glass is less common. One flat was due to a small, short wire that I only found by running my finger around the inside of the tire. (Ouch!)
Last week I had a flat on the right front of the tricycle, removed a small thorn from the tire, and put in a new tube. That made three leaky tubes waiting for a fix. This morning, the same wheel was soft, so I assumed I'd missed the actual culprit. Figured this was my cue to actually patch all the tubes, so I filled up the kitchen sink to locate the leaks. The three older tubes had clear leak sites, though the most recent of those was very small and slow.
But I couldn't find any leak in the newest tube. I suppose it's possible I didn't have the valve tightened completely and it was leaking slightly through the stem. (The tricycle uses Presta valves.) So I checked the tire carefully for possible causes and put it back on. We'll see tomorrow if it's gone soft again. Which would be annoying.
But at least I've gotten a bit more practice in getting the tire on and off, which requires a high level of believing that it can be done plus significant hand strength. (The front wheels on the tricycle can be worked on without removing them from the frame. The rear wheel is...more complicated. But not quite as complicated as the rear wheel of the Brompton fold-up, which involves a lot of keeping track of which small item goes where.)
Given how many miles I put on the bike, I probably have a relatively low rate of flats. I got heavy duty tires because the rec trails have some vegetation hazards. (Star thistles can serve as surprisingly functional caltrops.) Glass is less common. One flat was due to a small, short wire that I only found by running my finger around the inside of the tire. (Ouch!)