Retail Price: ¥3,740 (¥1,870 x 2) A tool born in England for replacing inner tubes. It can be difficult to fit tires when they're stiff, and you might even pinch the tube and cause it to burst when inflating. The Tire Key is a tire changing tool that won't fail. It's very easy to use. Plus, the tube won't get caught between the tire and rim, so you don't have to worry about pinching it. It can be used on both aluminum and carbon rims. I have multiple units, so if you'd like to purchase more than one, please leave a comment. Road bike Cycling Bicycle