I have a DK General Lee 24 inch BMX bike. I want to convert it into a freeride/park bike. So I would like to add a different fork, & some gears. Can I install a 16 speed or something similar on it? I know that other bikes with gears have special droputs. Will this be a problem on my bike? If so, can I get some sort of adapter? What system would you recommend with my bike? Also what would be the advantage of having a 24 inch rear wheel & 26 front wheel?