1. What is Wheel Torque?

Wheel torque is the rotational force at the wheels of a vehicle, calculated by multiplying the engine torque by the gear ratio. It's a crucial factor in determining a vehicle's acceleration and towing capacity.

2. How Does the Calculator Work?

The calculator uses the wheel torque equation:

Where:

• \( \text{Wheel } \tau \) — Torque at the wheels (Nm)
• \( \text{Engine } \tau \) — Engine torque (Nm)
• \( \text{Ratio} \) — Combined gear ratio (dimensionless)

Explanation: The gear ratio includes both the transmission gear ratio and the final drive ratio. This calculation assumes no drivetrain losses.

3. Importance of Wheel Torque Calculation

Details: Wheel torque directly affects vehicle performance. Higher wheel torque improves acceleration and towing capacity, while lower ratios provide better fuel efficiency at cruising speeds.

4. Using the Calculator

Tips: Enter engine torque in Nm (Newton-meters) and the total gear ratio (including final drive ratio if applicable). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between engine torque and wheel torque?
A: Engine torque is measured at the crankshaft, while wheel torque is the actual force reaching the wheels after gear multiplication.

Q2: How do I find my vehicle's gear ratios?
A: Check your vehicle's manual or manufacturer specifications. Ratios vary by gear (1st, 2nd, etc.) and include the final drive ratio.

Q3: Does this account for drivetrain losses?
A: No, this is a theoretical calculation. Real-world wheel torque is typically 10-15% lower due to drivetrain inefficiencies.

Q4: Why use Nm instead of lb-ft?
A: This calculator uses the UK standard unit Newton-meters (Nm). 1 lb-ft = 1.35582 Nm.

Q5: How does wheel size affect torque?
A: Larger wheels effectively reduce torque at the contact patch, while smaller wheels increase it (though the calculated wheel torque remains the same).