Seba Antirocker wheels are 42mm 101A wheels designed for inline skaters who want to go for a rocker or antirocker wheel setup instead of a flat setup. In a rocker configuration, the outside wheels of an inline skate are smaller than the middle pair, so the wheels are almost like a rocking chair (hence the name). Antirocker setups are the opposite: the outside wheels are larger than the smaller wheels. In both cases, the smaller wheels are put in place because the skater wants more room in their frame to grind over obstacles like curbs and rails.
Comes with spacers.