I have 3 other people that I ride with. We'd like to carry a few tire tubes with us on the trail. I'd like to buy as few tire tubes as possible to cover all the tires we have. My questions is how many do I need? I know that tubes of the wrong size will work temporarily just to get you home. That's what I'd like to do. So, between 16 tires, the different sizes are: 20x7x8, 22x7x10, 22x11x8, 22x10x9. I'm thinking I can get one 20x7x8 and one 22x10x9. Will this work?