I drive a BMW 1200 RT. Before purchasing this product, inflating a rear tire was an ordeal. Despite the bike's great design, the rear tire valve is so stupidly designed that it's almost impossible to get to it with a tire pump hose. The right-angle adapter greatly simplifies the work. I don't need any additional parts as the corners don't fit my bike, but the whole kit is so cheap that extra accessories aren't a big problem. I only use these adapters when inflating tires. I take photos after the run.