Is a tire with a generator track really necessary to run a bottle generator? I want some 30-32 mm flexy tires and have a BM system to install. What is there that will withstand the generator wheel and is also comfy and flexy? Terrain will be paved with moderate hills, but considering the state of Michigan these days, a lot of broken pavement and even roads reverted to gravel should be expected. Besides, construction could force is onto packed dirt from time to time.