We use cassette hubs now that allow us to run a smaller gearing yet maintain the same gear ratio. ie: 44 -16 is the same as 28 -10 or 25 - 9. The smaller sprocket is lighter stronger, and out of the way for ramp tricks and grinds. the only real downfall is running a cassette driver that is only 8 or 9 teeth is a lot harder on your chain and things wear out quicker. As long as you maintain your bike properly and check your chain regularly you shouldn't run into any problem.