Greetings,, I have a question since Im still a novice.. I have a Schwinn Krate style frame that I am building on (pics will be posted) Its going to sit on 20s with a 90 degree low fork .. my question is does it have to be fixed speed as it came or will i have enough clearance for multispeed .. like a 5 speed.. It came as a fixed and wanted to know if there will be any issues before i bought all the parts to convert to 5 speed... is it worth it?? will it cram my lowrider looks, or will i have limited choices on rims?? thanks...