settings
Gear Ratio & Top Speed
Ready
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Powertrain Inputs
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Transmission Preset
Custom
6-Speed JDM sports (Supra / Skyline)
7-Speed dual-clutch hypercar
Heavy-duty 5-Speed diesel
speed
Engine RPM
settings
Selected Gear
1st
2nd
3rd
4th
5th
6th (overdrive)
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Gear Ratio
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Final Drive Ratio
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Tyre Diameter (inches)
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Calculate
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Reset
Top Speed Result
speed
verified
Powertrain nominal
Theoretical velocity at selected RPM
—
mph
Top Speed
—
km/h
Top Speed
—
Total ratio
—
Wheel RPM
—
Engine RPM
Speed = (Wheel RPM · Ø · π · 60) / 63 360
Wheel RPM = Engine RPM ÷ (Gear × Final Drive)
Gear Mesh
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Mesh speed scales with wheel RPM
Quick Guide
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Gear ratio
— Lower number = taller gear = higher speed, less torque.
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Final drive
— Differential ratio multiplies every gear.
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Tyre Ø
— Larger diameter raises theoretical top speed.