These RPM Rear suspension arms (A-Arms) improve durability over stock suspension arms for Associated Rival MT8. It features increased material surrounding the inner hinge pins by 7%, the width of the thicker diameter by nearly 40%, and the amount of material at the outer hinge pins by 28%, plus an increased width there too, by another 9%.

RPM's suspension arms for the Associated Rival MT8 have beefier support beams, making them the toughest alternative to stock available. Unlike stock suspension arms, RPM's are a full 1/2" thick over nearly their entire length. The only taper is at the inner hinge pins to match the maximum size of the inner hinge pin bosses, with four massive support beams compensating for that slight taper.