Universal moped inner tube. This is our house brand tube, it comes straight from the factory to our warehouse, so we are able to offer them at a discounted price.
The tubes are marked 17 x 2.5in, but will fit a range of 17inch tires from 2.25 inches wide all the way to 2.75.
These thick tubes are really nice and harder to puncture with your screw drivers or tire irons then other cheapo tubes out there.
You would see this tube on all Puch Maxi, Magnum, and Newport mopeds. Also was used on the vast majority of Peugeot, and Motobecane mopeds. The most popular size there is pretty much.