Gear Comp

Bicycle gear ratio calculator and visualizer.

What it does

Input your bike’s chainrings and cassette cogs to instantly see how your gears perform. Calculates gear ratios, gear inches, and speed at a given cadence. Compare multiple setups side-by-side.

Features

• Manage multiple bike setups
• Preset library for Campagnolo, Shimano, and SRAM components
• Calculate gear ratios, gear inches, and speed
• Gear step percentages between adjacent ratios
• Interactive visualization grouped by chainring
• URL sharing for setup configurations

Tech Stack

• Svelte 5
• Vite
• Tailwind CSS