I recently purchased it as an alternative to the stock Amtel Planet DC and found that any and all comparisons to the latter are inaccurate, as the Formula Energy is vastly superior in every way barring wear and tear. So, rubber has a very low noise level. The road is moderately bumpy, but not soft enough to sense through the steering wheel. I read something about balance here, so now both of my wheels are at zero. empty, on two wheels, and weighing only five grams. While moving, sing a tune quietly.