I realize the 12" tires on a stock Tow-Pac are basically trailer tires. I have 2001 with the Tow-Pac Insta-Trike. I love the way it ride. But I'm wandering if there is any tire that is rated high speed? Say 80MPH. I have ridden 70 MPH, mostly 65 Max. But often wandered if the Tow-Pac tire will be OK at that speed. Thanks Jerry