30mph on a flat surface, 35 downhill
If you buy a smaller Drive roller the top speed on level surface is 38mph I believe, but you wont have any power up hills.
I rode to Allegheny state park and back a few weeks back on this. Took 2 hours 30 minutes there and 2 hours 20 minutes back. Thats from Elma to the campgrounds in the park.
Find me a cheaper price and I will match it.