Ok, don't kill me for desecrating an ATC by relegating it to pavement use, but I have a great 1985 Honda 110 that I want to use as a "pit bike" during my vintage auto racing weekends.

So it will be mostly used on pavement at fairly low speeds.

I was thinking of using a slick tire (the kind that are 100% smooth, not the sand slicks with the rib in the center), because I'm assuming it will smooth out the ride considerably compared to the standard knobbies that are on it now (and slicks look cool, too...) (and my race car has slicks...).

Or the other tire that seemed to make sense are the dirt track tires because they seem to have the flatest, most car-like contact patch.

Slicks I found were Goodyear, the only size available is: 18-9.5-8, and Nankang is size: 21-12-8. The stock Honda size is 21-11-8. I was thinking the 18-9.5-8 would work well as a front tire (narrower tire make it easier to steer) - is this correct logic? (Or would that tire size not even work on my rim, regardless?)

Any suggestions and advice would be really appreciated.

Thanks.

(and I promise that if any of you guys post a question on a vintage auto racing site about wanting to use a 1971 Formula Ford as a "pit bike" and need some set-up advice, I'll be nice)