I had a flat on my new 29er and had to walk home from the park. My new bike has tubes, so I had to go and buy new tubes. I fill them with STANS GOO and put them inside tire casing. The tires were realy hard to mount back on. One was OK, but the other one had a leak in the new tube, I guess I pinched the tube while wrestling with tire lever. It has been a while sense I used tubes, my other bike is UST. I know that I should partially inflate the tube before popping tire on the rim. Could anyone share their trick to putting stubborn tires on without damaging the tubes?