Dad picked up 2 tubes at TSC & went to air them up after installing. BOTH ripped over a foot on the inner circle next to the rims. TOTAL TRASH tubes from China. I told him to get tubes from a place 30 miles away because I get my GT tubes there in Good Year or Firestone for less than what TSC wants for their China cheapies. He called my place & they had them in what size we needed in Firestone brand. He took off to fetch them.
The TSC tubes were so trashy, I took the sides of the rip & lightly pulled....less than the pull to work a good zipper, and they just ripped further like they were made of rice paper. They were thick enough, but crap rubber.