110 up and down hills (there is no LEVEL in upstate SC or CT either!), no tailwind. Speedo indicated 115, so given the optimism (verified by timing a marked mile a couple times vs indicated 60mph), i'll stick by 110. More road and more balls and I believe it would climb a couple mph faster, but I don't like losing my license (and explaining what I was doing going 110 on my bike to my wife!) WHEN I move to CO, I'll give it a try in eastern CO/western Kansas where I CAN find flat ground....(and see the cops for 20 miles in any direction..)