I've been using them for about 4 months on my daily commuter / Marathon Supreme 40's. The web instructions are odd but improving. You don't need to use the blue rim tape provided though I did I wouldn't again. The valve stem isn't threaded, there is no nut to thread over and lock down. Some instructions I've seen claimed a rubber grommet is included for the the valve stem but I didn't receive one. I seem to have to top off the air a little more often than with standard tubes. I was careful to ensure presta valve properly screwed down. I experienced my first FOSS flat about 2 weeks ago but haven't repaired it yet, just replaced the tube. Symptoms are, depending on severity of puncture I suppose, an imperceptible soft deflation over several hours / night. I noticed the rear tire kind of soft one morning and just inflated it and rode to work. Next morning soft again. That's when it dawned on me. Puncture. I read that early batches had problems with leaks at welds though don't know that's the case here. So, as has been noted FOSS tubes aren't really flat protection but a way possibly get home or to a safe place of repair.
Jay, I've used Marathon Plus and now Supreme's exclusively for four years now. They provide flat protection but there is no flat guarantee, it just depends on where the offending bit strikes the tire. I had a roofing nail sticking out of the center of the tire with no damage but a sliver of wire found it's way along the side. I've gone years without a flat and then a couple within a month. The only gripe I have with wire bead Schwalbe's is they can be murder to mount. Some go on easy, others leave you sweating. I've read videos on mounting by hand alone and others requiring motorcycle levers ... I've done both. I much prefer folding bead. Mitch Browne San Luis Obispo, CA -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To view this discussion on the web visit https://groups.google.com/d/msg/rbw-owners-bunch/-/A7xRO77K2T4J. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
