Basically for shock value and show value. Not for daily riding or corner carving, obvousily. The best way I can explain IMO is with a 250MM rear swingarm its like riding a 100 pound girl on the back when you are not. With a 300MM swingarm its like riding a 200 pound woman on the back. Stopping takes longer, cornering is harder,etc. AGAIN IMO and the simplist way of explaining it. Rode both often again IMO.