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Strava Segment PR & KOM Calculator
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Rider & Equipment Parameters

Weight ⚖️

Rider Weight
The weight of the ride ready rider including helmet, glasses, shoes, etc., measured in kilograms (kg)
Bike Weight
The weight of the ride ready bike including water bottles, spares, cycling computer, etc., measured in kilograms (kg)
System Weight
The weight of the ride ready rider and the ride ready bike, measured in kilograms (kg)

Aerodynamics 💨

Drag Coefficient
The “slipperyness” of the rider and equipment, measured in Cd
Frontal Area
The total area of the rider and equipment, measured in meters squared (m^2)
CdA
The product of the drag coefficient multiplied by the frontal area

“Losses” 🐌

Drive train
The mechanical inefficiencies in the system (chain, gears, bearings, etc.), measured in percentage (%)
Rolling resistance
The friction between the road and the tires, measured by Crr


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