Review on KoolStop Black Tire Bead Jack by David Hill

I've driven a lot of miles. (More than 4,000 last year.) I've had to change inner tubes on my bike quite often. I have very fat tires but haven't switched to tubeless yet. I often had to change tubes in the field. However, I'm terrible at it. My first time lasted about 2 hours and resulted in lots of profanity and lots of bubbles. Last time (before I got this tool) it took me about 40 minutes, so I think I'll get less terrible with time. Last week I had my first apartment since buying it. I was still far from home. It took me less than 20 minutes to successfully change the hose! On the field! The next day I swapped both tires (not inner tubes) as they needed to be replaced. I did this in my garage and did both tires in 20 minutes (10 each). I know experienced cyclists laugh at my attempts and if you can beat my time this tool may not be for you. However, it now belongs in my backpack along with tools, hoses, repair kit, assembly levers and a small hand pump.