The Weaver W-B-W-5100000 Universal Lug Adapter fits the 40mm shaft size on the W-977 Wheel Balancer. The W-B-W-5100000 is for mounting wheels that are "Lugcentric", meaning the wheel is centered on the vehicle by means of the lug studs and not the hub of the wheel. When the wheel is lugcentric you will need to reproduce the same mounting on the wheel balancer as is used on the vehicle for maximum accuracy and performance. Excellent for "Clad Wheels" that will not fit a standard cone system.
Fits 3, 4, 5, 6, and 8 lug combinations. Bolts to the Balancers Flange Plate with 2 screws included.
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Very nice adapter at a reasonable price! Easy to setup and use.