EDS - Bike Gear

EDS - Bike Gear is your offline-first cycling mechanics companion, gear inches calculator, tubeless tire pressure tuner, and spoke length calculation vault. Designed for gravel riders, road cyclists, mountain bikers (MTB), bikepackers, and home mechanics, EDS turns complex bike physics and drivetrain geometry into precise, repeatable adjustments. Calculate exact Gear Inches and Development Meters across custom cassettes and chainrings, fine-tune tubeless tire pressure based on rim width and rider weight, compute 3-cross spoke lengths for wheel building, and estimate chain links—all in a rugged, clean mobile toolkit optimized for garage work and remote trails. Key Features and Cycling Physics Tools Drivetrain & Gear Ratio Engine - Gear Inches & Gain Ratio Scaler: Calculate exact gear ratios, rollout development (m), and gear inches for custom cassette/chainring combinations. - Cadence to Speed Matrix: Interactive table mapping pedal RPM to speed (km/h or mph) across all gears. - Chain Length & Link Estimator: Calculate required chain link count based on chainstay length and maximum tooth counts (1x and 2x setups). Tubeless Tire Pressure & Rim Geometry - Weight-Based Pressure Scaler: Calculate optimal front and rear tire pressures (bar/psi) using rider weight, bike load, rim internal width, and tire casing type. - Casing & Surface Conditioner: Adjust pressure targets for road tarmac, loose gravel, wet mud, or technical rock gardens. Wheel Building & Mechanics Vault - Spoke Length Geometry Calculator: Precision 3-cross and radial spoke length math using hub flange diameters, offset, and rim Effective Rim Diameter (ERD). - Suspension Sag & Preload Log: Record fork and rear shock air pressures, volume spacers, and rebound clicks for different trail conditions. 100% Offline Access & Workshop Utility - Zero Connectivity Required: Perform all drivetrain, spoke, and pressure math mid-trail or in basement workshops. - Imperial & Metric Native Support: Toggle seamlessly between millimeters, inches, Bar, PSI, and metric/imperial speeds. Designed for: - Cyclists optimizing gear ratios, rollout distance, and pedaling cadence. - Mechanics calculating spoke lengths and building custom wheels. - Mountain bikers and gravel riders dialing in exact tubeless tire pressures.