Up for sale is BRIDGESTONE TIRES BRIDGESTONE - PV78 170/80-15 TUBE. Ultra heavy duty is an industry leader - 4mm of natural rubber. Heavy duty, puncture resistant 3mm natural rubber.
It's a good tube. I don't really see it too much, actually never. But I know it's in there. Doing its job. Holding air. It's lasted a couple weeks so far and I expect it to last a lot longer. The last one I had lasted years. I have high hopes for this little guy.