Hi there -

First time poster here - I recently started riding to work on a commuter bike and all was going well until I got a flat tire that I can't seem to fix. I have 26x1.95 city tires with 26x1.9/2.125 sized inner tube, usually inflating to 55 psi, and my commute's 10 miles round trip on paved roads.

The flat happened on the inside of the inner tube facing the rim and deflate in seconds. I found a slit on the inner tube about 2mm long when I got the flat, and tried patching it with a glueless patch (I know I should use an glue patch, but it was all I had a time and I figured it would at least last me until I got home). However, the patch blew out when I was re-inflating the wheel at about 50 psi and the slit got a bit longer. I tried another patch and same thing - pics below of the blown patch and split that is now about 1" long. The split happens near the seamline of the rim if that matters.


I've checked the rim, rim tape and tire for any debris/splits and can't find anything. The rim looks to be in good shape - e.g.: not bent or anything.

I have a new tube I'm planning to install, but wanted to see if I missed anything so the same thing doesn't happen with the new tube. Any thoughts/explanations as to why this is happening would be much appreciated - I'm a newbie at this.

Thanks!