Unique Things - Unique Bicycle

Guys, this one is bicycle using car tire. I dont know if using "tire" word is appropriate, but maybe in another word is car wheel. Which one is better? ^^ im sorry for my wrong grammer. So, this bicycle is named KITTEN. It all made from metal with weight about 250 pounds, Let see how rock it can be.....

 

They are cool, arent they? ^^