Atomic has officially raised the bar with the MRX Ultra, the third generation of their link-less 2WD pan car platform and this one brings some serious, race-focused upgrades. Designed from the ground up for competition, the MRX Ultra blends cutting-edge engineering with smart adjustability, all aimed at one goal: maximum performance with the lowest possible center of gravity.
One-Piece 7075 Integrated Chassis
At the heart of the MRX Ultra is a one-piece 7075 aluminum chassis. Unlike traditional multi-piece layouts, the front bulkhead, center pivot mount, and rear guide rail are all integrated into the main chassis, ensuring perfect alignment and increased rigidity. The result is a more precise, predictable car—especially under high cornering loads.
Flexible Battery Configurations
Atomic gives racers options right out of the box. The MRX Ultra supports both:
-
Traditional horizontal battery layout
-
Inline vertical battery configuration
This flexibility allows drivers to tune weight distribution and balance to match different tracks and driving styles, while remaining compatible with 24mm wide (big block) batteries.
Ultra-Low Center of Gravity (CG)
Lowering CG was clearly a major design focus:
-
The mid damper has been relocated to the rear, eliminating heavy mass over the battery
-
A chassis cutout allows the servo to sit lower
-
Overall layout optimization results in what Atomic claims is the lowest CG among all available 2WD pan cars
On track, this translates to improved stability, smoother transitions, and more confidence at speed.
Advanced Front Suspension Geometry
The MRX Ultra debuts a new front suspension system that gives racers deeper tuning control:
-
Adjustable roll center and camber gain via shims at the arm pivot joints
-
Two front axle positions selectable via new knuckles—without changing wheelbase
-
Reduced scrub radius for higher mid-corner speed and better steering efficiency
-
Adjustable front track width using shims on the lower arms
These updates make the front end both faster and more forgiving, especially in technical sections.
Racer-Friendly Adjustability
Atomic didn’t forget the details that matter during race day:
-
Caster plates included (1°, 2°, and 3°)
-
Quick rear droop adjustment via set screw on the motor mount
-
Compatible with Auto-Scale ABS bodies, with shim-adjustable side body mount height
-
Designed for AGFRC A06CLS servo and OEM equivalents
-
Servo saver available as an optional upgrade
Final Thoughts
The Atomic MRX Ultra isn’t just an evolution, it’s a clear statement. With its integrated 7075 chassis, ultra-low CG design, and highly tunable suspension geometry, this car is built for drivers who want every possible advantage on the track.
0 comments