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RPM rear A-arms for the Associated MT8, in blue. They are designed to hold up better than stock arms. Around the inner hinge pins there is 7% more material, and the thicker section is nearly 40% wider. At the outer hinge pins there is 28% more material and 9% more width. The support beams are beefier. Stock arms run about 1/2 in (12.7mm) thick at the center and taper at both ends, losing nearly 30% of thickness at the outer pins. RPM arms hold a full 1/2 in (12.7mm) across almost their entire length, with only a slight taper at the inner pins down to 0.45 in (11.43mm) to fit the inner hinge pin bosses. Four support beams take the place of two. Molded from an engineering-grade nylon blend.
