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Replacement for Tamiya BP4 & BP5 Knuckle Arms for Dyna Storm. Just press the old 5mm axle into the new arm.
For use with reinforced DB211x C Hubs you have to remove the flat limit stop.
To remove the axle from the old knuckle, put on a flange nut and screw it on completely. Hold the knuckle arm tight in your hands and turn the nut over until the axle get loose. Press the axle into the the new knuckle arm until drilling holes for 3mm shaft align.