What is Best Bike Split?
Best Bike Split is a physics-based race planning tool for cyclists and triathletes that uses your power data, real course files, weather forecasts, and aerodynamic modeling to predict your bike split and create a personalized variable power pacing plan. Trusted by over 150,000 athletes and pro WorldTour teams, it helps you ride your fastest race by accounting for every hill, wind gust, and equipment choice.
What are the features of Best Bike Split?
- Physics-Based Pacing Plans: Combines your FTP, bike profile (CdA, weight), course elevation, and weather to calculate optimal power output for every segment—no generic percentage of FTP.
- Real-Time Power & Speed Guidance: Syncs with Hammerhead Karoo, Wahoo ELEMNT, and Garmin Edge devices so you follow targets live on race day.
- Accurate Race Predictions: When data inputs are accurate, predictions typically fall within 2–3% of actual bike split times, validated by thousands of athletes and pro teams.
- Equipment & Strategy Comparison: Models the impact of bike type, wheels, components, drag, weight, and weather to help you choose the fastest gear and pacing strategy.
- Course Database: Includes thousands of real courses worldwide, from Ironman events like Kona and Frankfurt to gran fondos and local races.
- Coach & Athlete Management: Dedicated subscriptions let coaches create plans for athletes, manage profiles, and share strategies from one account.
What are the use cases of Best Bike Split?
- Ironman and Long-Distance Triathlon: Plan your 112-mile bike leg to conserve energy for the marathon, with precise power targets based on course profile and weather.
- Gran Fondo and Century Rides: Avoid blowing up on climbs or headwinds by matching effort exactly to the terrain and your fitness limits.
- Pro Cycling Team Race Strategy: WorldTour teams like EF Pro Cycling, Lidl-Trek, and Canyon//SRAM Racing use BBS to optimize breakaways, time trials, and stage pacing.
- Indoor Training and Zwift: Export workout files to TrainingPeaks or Zwift so you can train the demands of your specific course indoors.
- Coaching and Athlete Development: Coaches create personalized plans for athletes, analyze ride data, and refine pacing strategies over time.
- Equipment Selection: Compare how different wheels, bike frames, or handlebar positions affect your predicted time before you spend money.
How to use Best Bike Split?
- Set Up Your Athlete Profile: Enter your weight, height, FTP, maxHR, bike type, wheel type, and components to build your base model.
- Choose or Create Your Course: Select an existing course from the database (including Ironman routes) or upload your own GPX file with elevation data.
- Add Race Day Conditions: Input forecasted weather—wind direction, temperature, and humidity—to refine the physics model for your exact event.
- Generate Your Pacing Plan: Let BBS’s math engine calculate variable power targets for every hill and flat section, then preview your predicted finish time.
- Sync to Your Head Unit: Export the plan as a Power Course to your Hammerhead Karoo, Wahoo ELEMNT, or Garmin Edge, and follow real-time power and speed cues on race day.
- Review and Improve: After your race, upload your actual power file to compare predicted vs. actual performance and fine-tune future plans.


