I think that some of these answers have been really harsh on the first gear. Sure it doesn't last to long but it is easy to get going with it and you can go faster than 15mph with it. I does come into its own with 2 and 3 though. I hit the rev limiter at Gateway Raceway in 3rd gear in the 4th turn and was going at a fairly good clip don't know exactly how fast. I was in 4th at the flagman at about 102mph and still felt like it had plenty left.