http://www.discountramps.com/motorcycle-wheel-balancer.htm
Black Widow Motorcycle Wheel Balancer BW-WB-03 is a great addition to any shop or garage for quick and convenient static wheel balancing. The axle rests on dual smooth rolling bearings on each side allowing the wheel to be finely balanced between two support arms. Center a motorcycle wheel on the axle with the steel centering cones and let gravity guide the way. The heaviest part of the wheel is drawn to the bottom and included weights can be placed along the rim to balance the wheel statically. A wheel will not rotate on the balancer once its weight is perfectly balanced.
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