Spoke calculates your real-world cycling speed from wheel size, gear ratio, and cadence — instantly, offline, no account needed. Pick from 8 common wheel sizes (16" through 700c / 650b), enter your gear ratio and cadence in RPM, and Spoke shows your speed in km/h or mph. The calculation engine handles any wheel circumference and any gear ratio, so it works for road bikes, mountain bikes, gravel rigs, BMX, folding bikes, and kids bikes alike. The Wheels tab gives you a quick reference for all 8 wheel sizes — circumference in millimetres plus the riding style each size is best suited for, from BMX street sessions to cross-country marathon racing. The Rides tab lets you save presets for your regular rides: name, wheel size, gear ratio, and average cadence. Six example rides are included out of the box so you can explore the calculator right away. Tap + to add your own and build a personal library of ride profiles. Everything runs locally on your device. No network calls, no ads, no account, no tracking. Features: - Instant speed calculation from wheel size, gear ratio, and cadence - 8 wheel sizes: 16", 20", 24", 26", 27.5", 29", 700c, 650b - Switch between km/h and mph at any time - Wheels catalog with circumference (mm) and use case for each size - Saved ride presets with name, wheel, gear ratio, and avg cadence - 6 preloaded example rides to get started immediately - Full offline — no internet connection needed
