JMP static balancer and rim centering device Provided with a 12mm axle and two cones 16 - 30 mm - suitable for each wheel hub. The axle operates friction-free on special ball-bearing rollers and can be positioned between the rollers with two adjustable stops A second pair of adjustable seats are embedded directly in the side struts and are used to receive a wheel on the stock wheel bearings The scope of delivery also includes a sensor with the side or top of a rim to check. Also suitable for centering newly inserted rims A built-in spirit level controls the vertical positioning of the device Adjustable foot parts on the underbody allow for precise positioning, even on uneven ground