I'm thinking of trying an Iron Butt Association ride on the WRR, but that's a lot of high speed highway miles.Yes, it's not the ideal bike for such a task, but that's part of the challenge. Not sure a 50/50 tire like the OEM TW30X or T63s would hold up well. However, there aren't many options without buying new wheels. Something like a Michelin Pilot Road 4 Trail would be great, but again wrong size.
What's the best high speed, long distance highway tire you can fit to the stock wheels?