Precision Gearing,
Maximum Velocity.
Match chainring and rear cassette cogs to your target cadence. Calculate gear inches across 700c, 650b, 29", and 26" wheels, and find the perfect ratio for climbing or sprinting.
Standardized Gear Inches
Compare a 48T gravel crankset directly to a 53T road double regardless of tire circumference.
Meters of Development
The metric benchmark for European road racing and fixed-gear track: distance traveled per single crank rotation.
Cadence Optimization
Pinpoint your 85–95 RPM endurance zone to protect knee joints and prevent premature muscular exhaustion.
Bicycle Ratio Tools
Everything needed to choose cassette cogs and optimize cadence.
Drivetrain Mechanics
Deep dives into 1x vs 2x drivetrains, cross-chaining drag, and cadence science.
Gear Inches Explained: The 1890s Standard That Still Wins Arguments
Why cyclists compare gears to penny-farthing wheels — the history-proof metric that makes any bike comparable to any other.
Fixed-Gear Gearing: One Ratio, Every Road
Single-speed riders choose once and live with it. The gear-inch bands, the 46/16 legend, and how terrain shapes the decision.