Originally Posted by
alexk_il
Just replaced an old tube, noticed a strange crossed pattern. I'm sure it's my fault, but I'm still curious how I caused it? The tube is OK otherwise.
It’s the threads of the tire casing like those below. It looks like you use talc.
It also looks like your tire is a 60 thread per inch (TPI) tire. Low thread count tires can be a problem if one of the threads breaks. The messed up portion of the tire above looks like this from the outside.
The tire had a definite snake belly to it.