SL wheel set is ascendor of most successful Revolution bmx wheel set . Not many riders know Revolution wheel set was the first wheel set ever coming in more sizes than just standard 20x1.75. Revolution wheel set also helped Maris Strombergs on his way to first bmx Olympic gold medal. Updated SL wheel set comes with over sized aluminum axle and 4 pawl alu driver providing super smooth rolling resistance and 60 POI. Our SL rims made out of AL 6061 T10 are providing necessary strength and stiffness.