Tire Rolling Resistance & Power Loss Calculator

PERFORMANCE WORKSHOP TOOL

Tire Rolling Resistance & Power Loss Calculator

Calculate total power loss in Watts resulting from tire casing hysteresis, inner tube material friction, and high-pressure surface impedance chatter.

1. Setup & Environmental Parameters

Tire Model Benchmark

What is Crr? The Coefficient of Rolling Resistance (Crr) is a dimensionless ratio of rolling friction to load, measuring casing hysteresis loss (energy lost as heat when flexing). You can look up empirical numbers on lab databases like BicycleRollingResistance.com (BRR), AeroCoach, or Best Bike Split.

Baseline Crr Value Auto-filled from preset; fully editable

Inner Tube / Setup System

Surface Type & Roughness

Total System Weight Rider + Bike + Gear (kg)

Speed Target pace (km/h)

Tire Inflation Pressure Pressure (bar)

Tire Width Casing width (mm)

Please check your inputs and ensure all numeric values are positive.

Rolling Resistance & Power Output

TOTAL ROLLING POWER LOSS

22.4 W

Total Effective Crr: 0.00312 | Speed Penalty: ~1.2 km/h

Casing Loss

18.2 W

Tire casing hysteresis

Tube Friction

0.0 W

Tubeless setup baseline

Surface Impedance

4.2 W

Vibration chatter loss

Speed Penalty

1.2 km/h

At 200W power output

Physics & Power Breakdown

Your inflation pressure is within an optimal range for this surface. Over-inflating on coarse roads increases surface chatter impedance and wastes significant wattage.

Workshop Tip: Switching from standard butyl tubes to latex, TPU, or tubeless yields immediate 6–10W savings at 30 km/h. On rougher surfaces, lowering tire pressure slightly decreases vibration impedance loss without sacrificing casing speed.

Runs locally in your browser. Calculations model baseline casing hysteresis with Silca and BRR empirical surface vibration impedance formulas.