That seems crazy for 2 tires. Their tires are flat as pancakes so I see no reason why they couldn't be shipped in a USPS flat rate box. A mini bike frame doesn't even cost that much. That must be a mistake. I would call them in the morning.
If it is a mistake, it's an awfully large one.
Those were screen shots from the sites, nothing more.
So from what I witnessed, I could buy 2 tires from OldMiniBikes or almost 6 from Walmart.
I realize that OldMiniBikes is hardly anything like walmart, but c'mon...
So to be fair I tried it again.
I forgot to mention there was also a $26 chain tensioner.
Without the chain tensioner, shipping is still $106, but add that $26 chain tensioner, and shipping goes up $33.
But try it yourself, shipping to 85360.