Just to share experience, if you compare weight of the rim, actually the lighter rims is suitable to use in town (busiest & traffic road, less impact to your engine performance.. But if you are the highway user, the heavier rims is better coz you can optimized the engine to work and the wheel momentum/rotation maintaining the speed of your car... It's based on my experience...So far, I still use 17" JRD rims (malaysia), a bit heavy for my long distance car... -Wira SE Owner-but one thing i don buy second hand rim althought is cheap...erm now i have to see which wan is better btw kspeed n ssw??i heard some say kspeed is heavy than ssw but the price ssw is cheaper...i wanna know which condition is better...ssw easy break??