My Toro Timecutter is old enough the tires have age-cracked to the point they were leaking too much. Rather than replace the tires, I bought tubes for the rears and with some difficulty got them installed. All was good for a month and then the left one developed a bigger leak. Knowing it was a puncture, I took it to my local tire store to have the tube patched. They supposedly checked it out and gave it back to me, saying the valve stem on the tube was bad.
I took it back home, wrestled off one side of the tire and pulled out the tube. Airing it up, a quick trip through the bird bath found a hole in the side of the tube. Realizing it couldn't have come from a nail, I pulled the tire off the wheel and sure enough, there were beads of Chicom weld spatter on the insides of the wheel. I should have checked and caught that before installing the tube!
A few minutes on the wire wheel was enough to polish off the little buggers. Took the wheel, tire and tube back to the tire store where they at first weren't sure they still even stocked tube patches; finally one was found in the back room and they patched the tube, mounted the tire and gave it back, no charge.
Bottom line - before installing tubes in originally tubeless tires, check the inside of the wheel for boogers.
jack vines
I took it back home, wrestled off one side of the tire and pulled out the tube. Airing it up, a quick trip through the bird bath found a hole in the side of the tube. Realizing it couldn't have come from a nail, I pulled the tire off the wheel and sure enough, there were beads of Chicom weld spatter on the insides of the wheel. I should have checked and caught that before installing the tube!
A few minutes on the wire wheel was enough to polish off the little buggers. Took the wheel, tire and tube back to the tire store where they at first weren't sure they still even stocked tube patches; finally one was found in the back room and they patched the tube, mounted the tire and gave it back, no charge.
Bottom line - before installing tubes in originally tubeless tires, check the inside of the wheel for boogers.
jack vines