Since the end of August I've been riding a Staton-inc axle mounted kit (w/a 35cc four-stroke Robin-Subaru engine) on my 26 inch tire mountain bike. I've had two rear flats in three months while riding on-road, the first time using a "regular tire/Mr.Tuffy brand tire liner/air-filled tube" combo, and the second time using an "Armadillo brand thorn-resistant tire/Mr.Tuffy brand tire liner/Sunlite brand thorn-resistant tube" triple combo. Ugh,...:sweatdrop: So I'd now like to pick the brains of those MB enthusiasts familiar with using a solid, flat-free tire on the rear rim, especially in cold, snowy climates. I'd welcome any feedback on this subject. If no one is familiar with this then maybe we can whip up an electronic brain storm of sorts,... I don't want to use a thickly reinforced rear tire, or a thorn-resistant tire liner that inserts between the tire and tube, or an air-filled slime tube but, rather, a solid tire on the rear rim in order to completely avoid rear tire flats. The only website I know of selling such tires is www.airfreetires.com but they don't sell studded winter tires (in the event of black ice and/or slick, packed snow on roads). Are there other good sites? Do studded solid tires even exist? On my pedal bike I use 26 x 1.95 studded tires with regular tubes for on-road use in the winter. This winter I could, of course, use a non-studded knobby-treaded solid tire on the rear rim and a studded tire (with an air-filled tube) on the front rim in a sort of 1/2 & 1/2 compromise. But how would that handle and perform on slick surfaces? I'm willing to make that kind of compromise, if there's no better alternative, in order to avoid rear tire flats in cold, snowy weather. My MB is a cherished possession as it's my only motorized vehicle. I often venture on 50 mile trips. I don't want to risk getting a rear flat, especially when it's cold out (it can drop to -10F in NH) as it can take over an hour to remove and reinstall the rear tire on my Staton-inc axle mount kit in ideal conditions such as a room-temperature tool-filled work area w/good lighting. Thank you.