RRT-ULTRA

RRT-Ultra Custom Forged Car Wheels in Singapore

The RRT-Ultra is one of the most highly optimized forged car wheels available today. It is engineered beyond what most manufacturers are willing to pursue, due to its ultra-deep side cuts, thin-wall sections, and complex geometry that significantly increase manufacturing time and cost. Each wheel requires many hours on a 5-axis CNC machine, making it a true engineering-first product rather than a commercially driven one.

The RRT-Ultra was never designed around mass production or margins. It is an exploration of how far a car wheel can be optimized when performance is the only priority. Every feature follows a strict form-follows-function philosophy. Every corner, profile, and cross-section exists to refine load paths, reduce unnecessary material, and improve structural efficiency.

This approach results in an extreme strength-to-weight ratio that places the Ultra ahead of competing forged wheels. To our knowledge, there is no other forged 6061-T6 aluminum car rim that is lighter while maintaining comparable load-holding capability. These are car rims built for drivers who understand that real performance is measured in data, not appearance.

If you demand the highest level of performance from your car wheels, the RRT-Ultra delivers reduced unsprung mass with exceptional lateral, vertical, and torque load capacity. Lower rotational inertia translates directly into sharper steering response, improved braking feel, and more efficient acceleration.

For those who demand nothing less than the best for their car, the RRT-Ultra represents engineering without compromise.

Thin Wall Technology with Ultra-Deep CNC Cuts

After extensive large-scale testing and development, the RRT-Ultra emerged as a benchmark in advanced forged wheel design. Extensive 5-axis CNC machining allows precise thin-wall sections and ultra-deep spoke cuts that maximize weight reduction while preserving structural integrity.

Many lightweight car wheels on the market focus only on reducing mass, often at the expense of stress management and long-term durability. At RRT, we take a different approach. Every RRT-Ultra wheel is developed using calculations, stress analysis, and real-world data to ensure that reduced weight does not compromise strength or safety.

If you are searching for car rims that are genuinely lightweight yet structurally sound, the RRT-Ultra stands apart.

5-Axis CNC Deep Spoke Cuts to the Barrel Brink

The RRT-Ultra features detailed 5-axis CNC machining that extends deep into the spoke structure and toward the barrel. This process removes excess material from low-stress areas, reducing rotational mass and wheel inertia.

The result is noticeable improvement in braking response, acceleration, and overall vehicle feedback. Due to the time-intensive machining process and high production cost, this level of detail is rarely applied in modern car wheel manufacturing.

RRT chooses to apply it anyway.

Our forged car wheels are built without shortcuts. Every machining hour serves a purpose, and every design decision is made to extract maximum performance from the material. This philosophy is what defines the RRT-Ultra and separates it from conventional aftermarket wheels.

Available Colors

*Actual colors may vary due to current lightings.*

Weight Description of RRT- ULTRA

** weight specs may verify due to different requirements such as brake clearances and load requirements **

Performance and Practical Benefits of RRT-Ultra

Base Material & Mechanical Properties

What this means in real terms:
For an equivalent design, a forged wheel can withstand roughly 30% more force before deformation and up to 3× more deformation before material failure. This is why forged wheels can be both lighter and significantly tougher.

Why 6061-T6 Is Forged, Not Cast

Load Path Engineering & Structural Strength

Polar Moment of Inertia & Profile Optimization

Custom Fitment & Performance Advantage

Bottom line:
Why invest in a lightweight wheel only to compromise it with heavy spacers? Proper fitment is a performance multiplier, not a cosmetic detail.