I agree with you krome, the bmx I have is hardly going to get me anywhere quickly, but by the same token, a longer seat tube like Leebo asks about can be done and a bmx becomes a 55 GI SS 20" bike. It's only going to go so fast. If you ride a mile or two to school or work that setup works just fine. Swap out the seat post and seat and one can go back to using it as intended, a fun toy. With the higher seat post and more comfortable seat, you can use it to ride thru the neighborhood, to the grocery/convenience store, even throw it on the Winnebago and ride it thru the KOA campground or State park campgrounds in the FL Keys ? It's a take your sweet time ride. I like mine in the neighborhood and don't have the extended seat post. I ride it to the nearest Starbucks, Wendy's, Publix/Winn Dixie, pizza place and even Subway for a quick ride and something that gets there pretty quickly for a shorter distance. A few blocks away, the voting precinct is located, I even ride it up there to vote. Saves me the hassle and headache of parking & traffic in the car.