Just bought these Carlisle Xtracs for $17.61 each and only $4.95 to ship them both from Summit Racing. I was looking at them for twice that price everywhere else plus much higher shipping rates. These are 13"x5"x6" came in four days. Gotta be better than my old stock tires that when I dismounted them found out neither had air in them. Big difference between old and new design technology. Though it did used to run with chains.