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Calcimator

Tire Pressure Calculator

Calculate optimal front and rear tire pressure based on rider weight, tire width, and terrain for the best balance of speed, grip, and comfort.

Inputs

lb
mm

Results

Front Tire Pressure

73.6 PSI

Rear Tire Pressure

90 PSI

Front Recommended Range69–79 PSI
Rear Recommended Range85–95 PSI
Comfort Rating4.2 / 10
TerrainRoad
How to Use This Calculator
  1. Enter your Rider Weight (with gear) in kilograms.
  2. Set your Tire Width in millimeters.
  3. Select Terrain Type: Road, Gravel, or Mountain Bike.
  4. Review recommended Front and Rear Tire Pressure in PSI, with acceptable ranges.
  5. Use the Comfort Rating to decide whether to run the lower or upper end of the range.

How the result changes with Tire Width

Tire WidthFront Tire PressureRear Tire Pressure
2862.1 PSI75.9 PSI
4827.7 PSI33.8 PSI
7215.1 PSI18.4 PSI
9210.4 PSI12.7 PSI

What each input means

Rider Weight (with gear)
Your weight plus clothing, shoes, and anything carried on your body (bottles, saddlebag, etc.).
Tire Width
The labeled width of your tire. Common road: 23-28mm, gravel: 35-45mm, MTB: 50-65mm.
Terrain Type
Select the primary terrain for your ride.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Rider Weight (with gear) = 80, Tire Width = 25, Terrain Type = 0 = 3 input(s) provided
  2. Calculate Front Tire Pressure
    Front Tire Pressure
    73.6 = 73.6
  3. Calculate Rear Tire Pressure
    Rear Tire Pressure
    90 = 90
  4. Calculate Front Recommended Range
    Front Recommended Range = `${frontLow
    69–79 PSI = 69–79 PSI
  5. Calculate Rear Recommended Range
    Rear Recommended Range = `${rearLow
    85–95 PSI = 85–95 PSI

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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