The ARRMA Kraton 8S is 26 lbs. (12kg.) of high-flying, dirt shredding, jump-killing fun! If your A-Arms aren't up to the abuse this massive monster can dish out, look no further than RPM. These replacement rear A-arms are designed with the backyard basher in mind and can handle some seriousabuse. The rear A-arms have a triple beam style construction designed to spread impact energy across all three beams. Each beam's cross-section is a whopping 5/8 (15.8mm) tall x 3/8 (9.5mm) wide. These massive beams reduce unwanted flex during normal suspension movement, yet allow impact-absorption during those not-so-perfect landings and crashes. We also moved the inner cross brace away from the chassis, eliminating the droop stop entirely. While this may seem counter-intuitive, the test truck's chassis was bent at the droop stops, clearly illustrating that extreme impacts were too much for the chassis plate to handle. After all, there's nothing worse than a bent chassis.Tech Notes: RPM Rear A-arms for the ARRMA Kraton 8S are sold as a pair. RPM A-arms replace stock ARRMA #ARA330590.