Cybertruck Suspension Deep Dive and RTI Test | Car and Driver

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This video by a technician gives a really good overview of the Tesla Cybertruck suspension. It goes into detail about the suspension components and how they work together.

Title: Tesla Cybertruck Suspension Deep Dive and RTI Test | Car and Driver


Ramp Travel Index (RTI) measurements (relative numbers). Higher is better.
On-road Med better than Off-road high due to: higher = more air = stiffer

The Car and Driver Ramp Travel Index (RTI) suspension test measures a vehicle's suspension articulation. In simpler terms, it assesses how much a vehicle's suspension can flex and allow its wheels to travel up and down independently.

Here's a breakdown of the RTI test and what it tells you:

• The Test: The vehicle is driven with one front tire onto a ramp angled at a specific degree (usually 20 degrees). The test continues until the opposite rear tire starts to lift off the ground. This point signifies the maximum suspension flex.
• The Measurement: The distance the vehicle travels up the ramp is then measured.
• The Calculation: This distance is divided by the vehicle's wheelbase (the distance between the center of the front and rear wheels) and multiplied by 1000 (to eliminate decimals). This final number is the RTI score.

What a Higher RTI Score Means:
A higher RTI score indicates greater suspension articulation. This is generally beneficial for off-road driving because it allows the vehicle to maintain better contact with the ground over uneven terrain. With all four wheels in contact with the ground, the vehicle has better traction and stability.

Things to Consider:

• Stock vs. Modified Vehicles: The RTI test is particularly relevant for off-road enthusiasts who modify their vehicles with suspension lifts and other components to improve articulation. Stock SUVs typically have lower RTI scores compared to modified ones.
• Not a Sole Measure: While RTI is a good indicator of suspension flex, it's not the only factor to consider for off-road capability. Ground clearance, approach/departure angles, and tire selection also play a crucial role.

In Conclusion:
The Car and Driver RTI suspension test provides a standardized way to measure a vehicle's suspension articulation, which is an important factor for off-road performance. A higher RTI score generally indicates better off-road capability due to increased suspension flex and ability to maintain tire contact with uneven terrain.

Traditional trucks:

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