Bicycle Tools & Calculators

Compare bicycle geometry across hundreds of bikes. Stack, reach, trail — all in interactive charts.

Visual geometry comparison tool. Overlay bike silhouettes to see how frames differ in size and shape.

Comprehensive geometry database with visual comparisons and detailed specs for road, gravel, and MTB bikes.

Calculate your ideal bike frame size based on body measurements. Covers road, gravel, and mountain bikes.

Find the optimal crank arm length for your body proportions and riding style.

SRAM's official tire pressure calculator. Enter rider weight, tire size, and conditions for optimal pressure.

Pressure calculator from the tire experts at Rene Herse. Accounts for rider weight, tire width, and terrain.

Data-driven pressure calculator by SILCA. Uses extensive testing data for road, gravel, and CX tires.

Modern spoke length calculator. Enter hub and rim measurements to get exact spoke lengths for your wheel build.

Spoke calculator with a large database of pre-measured hubs and rims. Quick and accurate spoke length results.

Official spoke calculator from Sapim, one of the leading spoke manufacturers. Includes their full spoke range.

Free structured workout creator and trainer app. Build custom workouts and sync to smart trainers.

Advanced workout planning, fitness tracking, and ride analysis. Sync with Wahoo, Garmin, or upload manually.

Analyze wind impact on your cycling routes. See real-time headwind/tailwind predictions for planned rides.

Detailed weather forecasts along your cycling route. Hour-by-hour conditions for every point on your ride. Paid service.

Powerful OSM-based bike routing planner with customizable profiles, elevation analysis, and GPX export.

Explore every road and trail in your area. Track which streets you've ridden and discover new ones to complete the map.

Tile-hunting game for cyclists and runners. Collect map squares by riding through them. Compete on leaderboards.

Strava heatmap and tile explorer. Visualize your activity coverage, find cluster tiles, and track exploration progress.

Independent tire rolling resistance tests. Compare road, gravel, and MTB tires with standardized lab measurements.

Compare power meter and smart trainer data across devices. Useful for checking accuracy and consistency.

Independent bicycle helmet safety ratings from Virginia Tech. Lab-tested impact protection scores for hundreds of helmets.

Visual gear ratio calculator. Compare chainring/cassette combos, see speed at cadence, and analyze gear range.

Stunning interactive explainer of bicycle physics — steering, stability, gears, and more. A visual masterpiece.