Practical explanations
Gear, tire and drivetrain guides
Understand the formulas and trade-offs behind the calculators without wading through filler.
How Gear Ratios Work: Speed & Torque
A practical guide to gear ratio, reduction, overdrive, output RPM and torque multiplication.
Read guide →How Tire Size Changes RPM & Speed
Understand how tire diameter changes effective gearing, highway RPM and speedometer error.
Read guide →Motorcycle Sprocket Changes Explained
A practical explanation of motorcycle final gearing, acceleration, cruise RPM and theoretical top-speed changes.
Read guide →Bicycle Gearing: Ratios, Gear Inches & Cadence
Compare bicycle gears using mechanical ratio, gear inches and cadence-to-speed calculations.
Read guide →