Or you're able to spin faster than I am. At nearly 50 I have lost some leg speed but the strength is still there. If you ever take Hwy 77 from Roca into town with the wind at your back, it's quite easy to run out of gear. The hills will allow 50 MPH with my younger legs (probably more for some) and my old legs will only do about 40. I can't think of anywhere around here that is hillier than Omaha so I'm sure I'd run out there as well.