Top Speed by Gear Calculator
Calculate your top speed in each gear based on
- Engine RPM
- Transmission Gear
- Gear Ratio
- Final Drive Gear Ratio
- Tire size
We created an easy to use Excel / Google Spreadsheet:
Simply enter your tire size in the peach colored box (top left under Step 1) and your gear ratios in the blue (right under Step 2)
You will need to know your tire size and gear ratios to use the sheet.
The tables below highlight the gear ratios and information about where to source the transmission. B-series Transmission Specs Transmission Name Engine Counter Part 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear Reverse Final Drive S1/J1 JDM B16A X-Si 3.230 2.105 1.458 1.107 0.848 3.000...
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