1. What is Gear To Tire Ratio?

Definition: Gear To Tire Ratio (GTR) is a calculated value that represents the relationship between a vehicle's gear ratio and its tire diameter.

Purpose: It helps automotive enthusiasts and mechanics understand how gear ratios and tire sizes affect vehicle performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GTR \) — Gear To Tire Ratio (unitless)
• \( GR \) — Gear Ratio (unitless)
• \( TD \) — Tire Diameter (inches)

Explanation: The gear ratio is divided by the tire diameter to determine how much mechanical advantage is being applied at the tire's contact patch.

3. Importance of Gear To Tire Ratio

Details: This ratio helps in comparing different gear and tire combinations, optimizing for acceleration, top speed, or fuel efficiency.

4. Using the Calculator

Tips: Enter the gear ratio (typically 2.5-4.5 for most vehicles) and tire diameter in inches. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does a higher GTR value mean?
A: A higher GTR indicates more mechanical advantage, resulting in better acceleration but lower top speed.

Q2: How do I find my vehicle's gear ratio?
A: Check your owner's manual, look for axle codes, or consult manufacturer specifications.

Q3: How do I measure tire diameter?
A: Measure from the ground to the top of the tire, or use tire size calculators based on tire markings.

Q4: What's a typical GTR range?
A: Most street vehicles have GTR between 0.08 and 0.15, but this varies by vehicle type and purpose.

Q5: How does changing tires affect GTR?
A: Larger tires decrease GTR (better highway cruising), while smaller tires increase GTR (better acceleration).