the 27.5 x8 tire is about 500ea. the 22 are less. I think that's where the 500 came from. but still much better than the Alaska bush tire. I went for a flight yesterday and it is nice to take off and not have to hit the brakes to stop the tires after take off. I use to with the nanco 21's. of course the plane would go all over the place hitting the brakes. all I could think of is, what are people thinking when I did it. he must be a bad pilot to be going kitty wampus on take off. at least that's what I was thinking.