wonder what caused this innertube split

[eric_james]

Impac tube. Gone near the valve.

 

[KermitGKona88]

Bad manufacture or over inflation, or both...

 

[mk one]

Yeah, looks like just manufacturing, though the valve area gets a lot of stress through breaking force, it usually splits right at the bottom of the valve stem.

 

[Suprachrgd82]

That’s a border where 2 rubber components were bonded by heat, pressure, or chemical. The split likely caused by some degradation of the area followed by high stress.

 

[greencat]

Some tubes are notorious for failing along seams eg Vavert.

Some tyre/rim combinations will eat inner tubes at the valve stem area under heavy braking. I was going through tubes about one a month on one bike until I replaced the wheel and tyre. Seems like overkill, but my reliable commuter bike was no longer reliable and therefore near worthless as a commuter.

 

[eric_james]

Thanks all. I have had the tube for a while now. It's not a common occurrence on this bike