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Rear A-arms from RPM for the Associated B64 and B64D. Slop at the hinge pins can cause suspension settings to drift. RPM found up to 0.003 inch (.076mm) of clearance in the hinge pin holes of a new stock set. RPM holds its hinge pin holes to much tighter tolerances, with 0.0005 to 0.001 inch (.013 to .025mm) of clearance, an improvement of nearly 300 percent. Stock A-arms are reported to break easily. RPM arms are designed to be tougher, and in-line screws hold the outer hinge pins, which removes an extra hole that weakens the arm. Each arm weighs 2 grams less than stock, or 4 grams per pair, and the arms help hold suspension settings consistently. FITS: Associated RC-10 B64 4WD, RC-10 B64D 4WD buggy
