I noticed on UDC they weren’t available. They’re not making them anymore. I contacted FOSS and they indeed stopped making them. Btw, I always thought it was John Foss who created these tubes but it wasn’t. At first, I thought these tubes were kind of weird, but really grew to like them. I had one last over a year and over 2000 miles. The only reason it failed was because once again my rim strip failed.
I have a few regular 36 tubes now but you can immediately feel the weight difference. I have 1 FOSS tube left though…
You snooze, you truly lose… I was going to order 10 of these 2 years ago but said to myself they’ll be right here on UDC…nope.
If you’re not keen on spending €65 for 2 tubes, you may use a cheap €5 29" Butyl tube. They can be extended to fit a 36" wheel, while being lighter than FOSS tubes.