The faster, tougher design of the ARRMA SENTON 4X4 MEGA 550 Short Course Truck amplifies your racing thrills as only ARRMA can! The ARRMA design team has loaded this RC short track RC truck with every advantage a new driver could want — 1/10 scale realism, ready-to-run simplicity, and 30+ mph speed potential with full-time 4WD traction and power. Start with the recommended NiMH battery pack or upgrade to a 2S LiPo to take the speed, run time, and excitement to a whole new level.



In The Box
(1) ARRMA® SENTON™ 4X4 MEGA 550 1/10 Scale 4WD Short Course Truck RTR
(1) MEGA Waterproof* ESC
(1) MEGA 12T Brushed 550 Motor
(1) Spektrum™ Waterproof* SPMS650 Digital Servo
(1) Spektrum™ SLR300 Receiver
(1) Spektrum™ 2.4GHz SLT3™ 3-Channel Transmitter
(1) 1/10 SENTON 4WD V3 MEGA Manual

Needed to Complete
(1) 7 Cell NiMH Battery or 2S Lipo 7.4V Battery with EC3™ or IC3™ connector
(1) Compatible Battery Charger
(4) AA batteries for Transmitter

Overview
The best short course RC truck for first-time bashing through amplified all-road blasting is the ARRMA SENTON 4X4 MEGA 550 RTR. Though easy to drive, affordably priced, and ready-to-run — its aggressive 1/10 scale styling hints at high-speed excitement that’s ahead. Speeds of 30+ mph are achievable under optimum conditions. From its full-time 4WD transmission to the large diff gears, every part of the ARRMA SENTON 4X4 MEGA 550 has been engineered by the ARRMA design team of RC enthusiasts to survive brutal blasting. The remote control short course truck’s smooth handling has you looking like a winner right off the starting line, and its wide wheelbase and vented tires let you put the hammer down on nearly any off-road or paved surface. An innovative modular chassis simplifies maintenance and repairs, cutting down time to the bone. The included Spektrum radio lets you limit top speeds to 50% or 75% of full throttle until you’re ready for it all, and its ergonomic grip fits your hand like a glove. ARRMA recommends a high capacity NiMH battery. You can also upgrade easily to 2S LiPo power to take your RC 4x4 fun to the next level. Fully assembled and ready-to-run, the ARRMA SENTON 4X4 MEGA 550 Brushed RTR just needs batteries and a charger before you’re ready to make your move!

MEGA 12T brushed 550 motor
MEGA waterproof ESC
IC3™ connectors (EC3™) compatible
30MPH (48km/h) speed achievable in optimum driving conditions with optional gearing
Ready to Run (RTR) completion level is fully assembled and includes everything needed besides batteries and a charger

Features
Stronger chassis and retained hinge pin plates
Steering with more clearance for stones
Castellated slipper pad and sliding gear mesh
23T Spline servo saver
Brushless-ready 37T 1.35Mod diffs with silicone O-rings
Power Module with sliding gear mesh and improved dirt management
Rubber shielded bearings throughout
Oil-filled shocks with silicone O-rings
MEGA 12T brushed 550 motor
MEGA waterproof* ESC
* Note: For details on waterproof standards, refer to the instruction manual
IC3™ connectors (EC3™) compatible
Signature easy-access modular design
Easy-access power module
Easy-access electronics module
Easy-access diff module removal front and rear
Double wishbone suspension front and rear
Metal-geared differentials
Adjustable ride height
Adjustable body mounts
Extended height dirt defenders
Multi-terrain dBoots® Fortress™ SC tires
Tough multi-spoke black wheels
2-year limited warranty (see website for details)
30MPH (48km/h) speed achievable in optimum driving conditions with optional gearing



Spektrum™ 3-Channel SLT3™ 2.4GHz radio and SLR300 Waterproof* Receiver
Fast response SLT™ protocol
Foam wheel
Improved grip and trigger feel
Improved wheel and trigger force
2-way thumb switch third channel
50% and 75% Throttle mode (for beginners)
Tactic® SLT™ receiver compatible



Metal-geared differentials
Large gears can withstand huge torque, and internal metal gears have been chosen for reliability during extreme bashing.
Easy-access front and rear diff module removal.



Spektrum™ SPMS650 digital servo
84 oz-in (6 kg-cm) @ 6V
20% more torque than the previous ADS-5 servo for improved steering feel
Waterproof*
* Note: For details on waterproof standards, refer to the instruction manual



Strengthened Chassis
Stronger chassis and retained hinge pin plates



Larger pull tab on power module




Castellated slipper pad and sliding gear mesh




Rubber shielded bearings




Redesigned Steering
Steering with more clearance for stones.



Tougher brushless ready transmission
Metal input spline moulded into composite gear. Same gears as the ARRMA 4S.



Sealed Wheels & Vented Tires
Stops dirt getting in and allows water to escape.



Multi-terrain dBoots® Fortress™ MT tires
Tough, multi-spoke black MT wheels with dBoots® Fortress™ MT tires give the GRANITE™ 4X4
MEGA RTR effective traction for bashing on almost any terrain.



Silicone O-rings
Oil-filled shocks with silicone O-rings



Heavy-Duty Bumpers
Impact absorbing.



Proven Power Package
MEGA 12T brushed 550 motor
MEGA waterproof* ESC
* Note: For details on waterproof standards, refer to the instruction manual
IC3™ connectors (EC3™) compatible



Easy-access power module

Detaches from chassis as a complete unit by removing one screw.
Contains motor, motor plate, slipper clutch assembly and gear cover.



Easy-access electronics module
Two-piece molding screwed to the chassis contains a waterproof receiver box, servo mount, and ESC tray.
Receiver mounts inside sealed module for protection from dirt and moisture.
ESC screws to the top for easy maintenance and switch access.
Servo mounts on the side for quick servicing.



Proven tough composite shock towers

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