Is an innertube blowout due to heat likely in the uk?

[Smurfy]

Attached is a picture of said tube. The tear is about 3cm long overall.

@fossyant - I had been using the bike the night before so they hadn't got the chance to go really flat. It is quite loud though when they go!

This picture and/or the failed tube is your best chance of tracing the source of the blowout. Where is this tear in relation to the tyre/rim? Is the tear facing the rim, facing the tyre, or facing the rim/tyre interface? From that information you may be able to trace the source of the blowout, although if the tube was twisted at the time of the blowout it could be misleading, or a twist could even be the source of the trouble.

If the tear was facing the rim, take a good look at any burrs or sharp edges on the spoke holes, be suspicious of the veloplugs, and consider changing to good quality cloth rim tape. Latex is very flexible/stretchy (much more so than Butyl tubes) and would easily squeeze under a badly seated or defective veloplug and contact a sharp edge on a spoke hole. If it was facing the tyre tread check for tyre defects or objects protruding through the tread. If facing the tyre/rim interface be careful with trapped tubes or burrs where the two ends of the rim join together. I'm interested in what might have caused this, so please let us know where the blowout is in relation to everything else.

One other thing is that the tear appears to roughly follow a mould line on the tube. From memory, latex tubes don't have mould lines around the circumference, they only have a lap seam where the two ends join/glued, so I'm not sure what's going on there! Are all your latex tubes like that with mould lines?

 

[avalon]

I never adjust the air pressure in my tyres and where I live the temperatures can range from below 0 to the mid 40s (probably 50s in the bike shed). I get occasional blow outs but I don't believe it's due to the air temperature.

 

[Waspie]

This picture and/or the failed tube is your best chance of tracing the source of the blowout. Where is this tear in relation to the tyre/rim? Is the tear facing the rim, facing the tyre, or facing the rim/tyre interface? From that information you may be able to trace the source of the blowout, although if the tube was twisted at the time of the blowout it could be misleading, or a twist could even be the source of the trouble.

If the tear was facing the rim, take a good look at any burrs or sharp edges on the spoke holes, be suspicious of the veloplugs, and consider changing to good quality cloth rim tape. Latex is very flexible/stretchy (much more so than Butyl tubes) and would easily squeeze under a badly seated or defective veloplug and contact a sharp edge on a spoke hole. If it was facing the tyre tread check for tyre defects or objects protruding through the tread. If facing the tyre/rim interface be careful with trapped tubes or burrs where the two ends of the rim join together. I'm interested in what might have caused this, so please let us know where the blowout is in relation to everything else.

One other thing is that the tear appears to roughly follow a mould line on the tube. From memory, latex tubes don't have mould lines around the circumference, they only have a lap seam where the two ends join/glued, so I'm not sure what's going on there! Are all your latex tubes like that with mould lines?

The tear was facing rim, so I will check for rogue veloplugs etc. Pretty sure the tube wasn't twisted.

These were my first set of latex tubes so don't have anything to compare against, but certainly the two spares have these mold lines.