Gear Speed and Tire Size
Stop guessing and start tuning. Visualize gear ratios, compare tire diameters, and optimize your drivetrain with interactive graphs and professional-grade reports for every project.
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The tools that make this app stand out, trusted by 18K+ users.
Visualize speed and RPM across up to 8 gears. Use interactive graphs to identify your ideal power band for drag racing, off-roading, or highway cruising.
Swap between inches and millimeters to compare OEM setups with aftermarket upgrades. Instantly see how tire diameter changes impact your gearing and speedometer.
Generate professional PDF reports of your calculations. Perfect for documenting your project car specs or sharing technical data with your mechanic.
Trusted by 18K+ people who love this app.
"I just moved up to 37-inch tires on my Jeep and this app was a lifesaver for figuring out which differential gear ratio I needed to maintain highway driveability. The interactive graph helped me visualize exactly where my RPMs would sit at 70 MPH. Being able to use Split View on my iPad while browsing parts sites made the whole planning process seamless."
"As a professional mechanic specializing in restomods, this is my go-to tool for transmission swaps. I recently used it to calculate the perfect gear set for a 6-speed build, and the ability to export the results as a PDF for my client's build folder adds a layer of professionalism that basic calculators just can't match. The 9000+ RPM range is perfect for high-performance projects."
Everything you need to know about Gear Speed and Tire Size.
Description
Latest Version
4.1.2
Size
4.0 MB
First Released
Oct 26, 2015
Join over 18,000 enthusiasts who rely on professional-grade precision. Download now to visualize your gear speeds, compare tire setups, and optimize your vehicle's performance directly from your garage.
Everything you need to know about Gear Speed and Tire Size
The Gear Speed and Tire Size Calculator app compares different tire and wheel combinations to transmission gears and differential ratios for performance analysis.
The Gear Speed Calculator determines speed in MPH or KPH for specific tire sizes, transmission gear ratios, and differential ratios, displaying results graphically and in a table.
Yes, the Gear Speed and Tire Size Calculator app includes a dedicated Tire Size Calculator for comparing original equipment tires to aftermarket options.
Yes, the Gear Speed and Tire Size Calculator app supports printing or saving calculation results into a PDF by selecting the "Share PDF Results" option.
Yes, the Gear Speed Graph in the Gear Speed and Tire Size Calculator app is interactive, allowing users to compare, hide, or show specific gear speed lines.
Yes, the Gear Speed and Tire Size Calculator app includes Multitasking, Slide Over, and Split View support for the latest iPad models.
The Gear Speed and Tire Size Calculator app includes three distinct calculators: Gear Speed, Tire Size, and TMX Tire Size Calculators.
Yes, the Gear Speed Calculator allows users to select between MPH or KPH for displaying speed results.
The Tire Size Calculator compares original equipment tire sizes (Rim in inches) to alternate aftermarket tire sizes, providing detailed comparison data.
The app offers selectable gear speeds from 4 to 8, allowing users to tailor output results based on their transmission type.
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