Hi Bob, Re: Brainard.........
Hold on to your parachute cord! That's supposed to be the fastest closed course in the country. The Start/Finish straight plus the slight jog (right) and continued straight pavement is in excess of a mile long, I heard.
You might even use 5th gear!!!
Wish I knew if it was smooth or bumpy to give you a clue which wheel/tire combo would work best.
Have fun and give us a complete report when you get back. I've yet to make that trip.
Best regards, Tom
Port Washington, WI 53074