In the name of God, the Most Gracious, the Most Merciful. I am offering you a Cobra bicycle. I think it is size 18. Its problems are when you are riding, it stops, and then it continues. I think it needs new inner tubes for both tires. So, when you go to fix it, ask them if the tires need to be changed or just the inner tubes because I don't know. The price is 150.