With the amount of voltage and amperage you're talking about in a lightning strike, the rubber tires, etc., would be next to useless. That kind of juice would arc to the frame of the bike so fast it would make your...well, you get the picture. Also, if I recall correctly, most of the highway between Denver and Boulder is concrete instead of blacktop, so there are literally tons of iron rebar all in a nice grid 6 or 8 inches below the surface of the road.
I have since checked out the possibilities of that happening, and low and behold, you can get zapped!
How's that saying go? ...
"I'd rather be lucky than good anytime".
Yeah ... that's it. ;)