Got my first flat with my WR250R. Went to start it after sitting for winter to try out the new seat and had a big screw in the rear tire. Decided to use the opportunity to change from stock gearing and to learn how to change tubes trail side style. Have watches as many videos as I can find and feel that I have the technique down pretty well except for one thing. I am convinced I cannot get the tire bead down deep enough in the rim drop center. I am 180-190 pounds and when I stand on the tire the sidewall barely moves. All the videos I watch people mention this and say, “make sure you get the bead in the center” and “just kneel on it and make sure to check it as you spoon.” My sidewalls, on the stock Trail Wings, just want to push into the rim so hard I can’t make the space I need to get the tire on. The videos I see people are pushing the tire sidewalls down with a single thumb, and when my bike has a flat you don’t even know because the tire is stiff enough to keep its shape. First attempt I ended up having to use a c-clamp to close the bead to get the tire on, but pinched the tube. Before the clamp I was sure I would rip the tire. Trying to learn to do it with just spoons and a trail bead buddy, the small one, so I tried another tube today. Went better, but still had the hardest time getting the bead to drop into the channel, and when it does I am sure it is not enough. Are the sidewalls on these just really stiff being DOT tires? I have considered maybe a hybrid way of the zip tie method, just do the first part of the tire with ties and spoon the rest on and cut them, I could do that on the trail. Don’t want to lug around a c-clamp. The tire was warmed by the sun first and there was plenty of lube, I am convinced I just can’t gain the final clearance because the beads are trying to sit against the rim and not dropping down. Any advice from the tire change gurus? There have got to be tons of guys and gals that make these tires look easy.