Tire Size Horsepower Calculator
Calculate how tire size affects your vehicle’s horsepower, acceleration, and performance metrics. Understand gear ratio changes and their impact.
Step 1: Tire & Vehicle Details
Understanding Tire Size Impact
Changing tire size affects your effective gear ratio. Larger tires reduce engine RPM at a given speed, potentially hurting acceleration but improving fuel economy. Smaller tires have the opposite effect.
Step 2: Additional Options
About Effective Gear Ratio
When you change tire size, you effectively change your final drive ratio. A 10% larger tire diameter is like having a 10% taller (numerically lower) gear ratio, which can reduce acceleration but improve top speed and fuel economy.
Tire Size Impact Results
Effective Horsepower Change
Tire Size Comparison
| Tire Size | Diameter | Circumference | RPM at 60 mph | Effective Ratio |
|---|
Tire Size Impact on Performance
Tire Size Calculation Formula
Effective Ratio = Gear Ratio × (New Tire Diameter / Old Tire Diameter)
The effective gear ratio changes when you alter tire size. This affects acceleration, top speed, and engine RPM at cruising speeds. The calculation considers the change in tire diameter and its impact on the final drive ratio.
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