Since there are Stirling engines in China with over 400hp, I don't think that this is the most powerful one in the world. In fact, it's not even close to the most powerful one you can buy commercially and have sent to your house . . .
Thank you ! You saved my life and YES I lost about 2000 calories trying to get the tire out and the new one back in (the sloid one!!) TIP ..... TIP ....... If you don't want to use the Microwave : BOIL water in a pot, turn it OFF and stick the tire in for 5 mins !!! It works !!!!