Tire Pressure Formula:
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Definition: This calculator determines optimal tire pressure based on SILCA's proprietary algorithm using total system weight, tire width, terrain type, and weight distribution.
Purpose: Helps cyclists achieve the perfect tire pressure for comfort, speed, and puncture protection across different riding conditions.
The calculator uses SILCA's formula:
Where:
Explanation: The calculator accounts for rider+bike weight, how weight is distributed between wheels, tire volume, and surface conditions.
Details: Correct pressure affects rolling resistance, grip, comfort, and puncture protection. Too high reduces traction and comfort; too low risks pinch flats.
Tips: Enter total system weight (rider + bike + gear), tire width in mm, select terrain type, and weight distribution (typically 60% rear for road bikes).
Q1: What's "system weight"?
A: The combined weight of rider, bicycle, and any carried gear or luggage.
Q2: Why different pressures front/rear?
A: Most bikes carry more weight on the rear wheel (typically 60/40 distribution).
Q3: How does terrain affect pressure?
A: Rougher terrain requires slightly lower pressure for better traction and comfort.
Q4: What about tubeless tires?
A: Tubeless can typically run 10-15% lower pressure than tubed tires.
Q5: Should I adjust for wet conditions?
A: In wet conditions, consider reducing pressure by 5-10% for better grip.