Semi-Truck
Gear Analyzer
Know your numbers. Win more races.
Compare Setups
Run unlimited gear combinations.
See Real Results
Instantly see speed, RPM, and ET impact.
Print & Save
Generate detailed reports for your team.
Calculate. Compare. Dominate.
1. Enter Your Specs
Tire, gears, trans, and shift RPM
2. See The Results
Instant speed, RPM, and ET data
3. Compare Setups
Find the most powerful combination
4. Print & Save
Take your report to the track
| Gear | Ratio | @ 2400 RPM | @ 2800 RPM | Max Speed (RPM) | ||
|---|---|---|---|---|---|---|
| MPH | Engine RPM | MPH | Engine RPM | |||
| Gear | Transmission Ratio | Overall Ratio (× Diff) | % Step to Next Gear |
|---|
Quarter-mile estimates use power-to-weight formulas corrected for elevation. Real-world results vary with traction, gearing, and driver.
Quarter Mile Estimate
SECONDS
Trap Speed Estimate
Jimmy's Custom Speed Shop
Gear Ratio & Performance Report
Your Setup
Speed & RPM Results
Gear Ratios
Performance Summary
ET Calculator
Loaded Competition
Printable Reports
Generate detailed reports to take to the track, share with your team, or save for future reference.
Race Ready Data
Get the data you need to make smarter decisions and leave the competition behind.
Built by Racers
Our Gear Analyzer is built by racers, for racers. Real-world data you can trust.
The right gearing makes all the difference.
Use the Gear Analyzer and build a setup that wins.