Parts & Accessories Rounds Five Maxxis Balloon 16 -900 tires. 4 of them are model 24 and the spare is model 20. One has about a quarter of its life left. And three have about half their life left. The spare is clean and has good tread, but it has some cuts on the sidewall. When I removed it, I couldn't hear any leaks, but it needs air. The video shows the condition.