42139 TRF511 Chassis Kit This Off Road Racer TRF511 chassis kit picks up where the successful high-end 1/10 R/C Buggy TRF501X left off. From participating in road competitions, many valuable lessons have been learned and have been applied to making this TRF511 more user friendly and a lot more competitive. About the Model - Although it follows the same general layout as the TRF501X, almost every part has been newly designed, making it lighter also improving ease of maintenance. - Thanks to the data taken from actual races, the suspension arms have been redesigned for improved performance. - The new drivebelts are stronger, more durable, and substantially reduces drive resistance. - Equipped is an upper/lower separate type center bulkhead which improves motor removal and installation efficiency as well as spur gear and pinion gear clearance setting adjustments. - New battery position improves the machine's weight balance as well as jumping and landing characteristics. - The suspension's new geometry guarantees greater stability and better turning performance. - Battery pack & charger, ESC, body, chassis cover, rear wing, tires, and 2-channel R/C system separately required. - A wide range of Grade-Up parts are available for further customizing your machine. - Note: This is a chassis only kit. A body and rear wing are not included. Items 54133 TRF511 Body/Chassis Fairing and 54134 Buggy Racing Wing lowered version Set are sold separately.