Last week I mounted up a MT-43 rear on my WR-R. Love the tire so far, except that today I had a flat and had a helluva time fixing it solo on the roadside. But that's another story. Anyway, tomorrow I'm going to buy a new tube and my question is what kind to buy? Regular, Heavy Duty, or Extra Heavy Duty? I was told I should run 12-14 psi on the street with this tire and that higher pressure would cause premature wear in the middle. I split the difference and set it at 13 psi cold (Accugage that's always been spot on). When I mounted it I used a tube that had a patch on it on the outside (facing the tire tread). It's one that had gotten a puncture from a finishing nail that I'd patched last year and had done fine for over 6K miles in two D606s running 25-30 psi most of the time for the road. I know I should have put in a new one, but it was all I had at the time and held up fine for the first three rides - around 400 miles. Anyway, today coming back home after about 75 miles at 55-60 on backroads the rear got squirmy and when I pulled over it was flat. When I got the tube out the leak was at the patch and the patch had gotten so hot it looked discolored and melted. Didn't look at all that way when I put it in last week. So, I'm assuming that the low pressure + Alabama summertime + sustained road speeds is generating mega-heat, right? I've always read that you don't want to run the really heavy duty tubes running low pressure on the road due to heat buildup, but I want a more robust tube to avoid pinch flats. What to do? What are you guys running in the MT-43s? Thanks!