Tyre Valve: Hidden leaky culprit
Modern tyres are not just blocks of round rubber to help you go round and round. They provide all kinds of support such as stopping in time and cushioning against bumps and, well, that's about it. All that cushioning doesn't work though, when there's low air pressure. We talked about how too much and too little pressure could be bad for safety and performance. This week, we point out the culprit that's often behind the loss of pressure.
Modern tubeless tyres are brilliant because they don't instantly deflate from small punctures. It's often a gradual leak that helps you get somewhere safe before being overtaken by a murderous rampaging cow. But tyres can sometimes mysteriously sag even when no puncture is apparent. It's cause of the valve; the one that goes 'hissss' when you press it.
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The tyre valve is a device that allows air to travel in one direction. Air goes in and won't come out. If the air comes out, it's no longer a valve, it just becomes a political promise: completely useless. These valves are made of rubber. Rubber ages. Also they can get pulled or twisted. I have a dog that chews on my valve stems whenever he can. It causes tiny fractures in the stem which quickly causes loss of air. It's what we refer to as 'chorai leak'.
When you can't find a leak in the tyre, it's the valve attached to the rim. They are easy to replace and quite cheap. At most they cost Tk 100 a piece.
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