Tyre Pressure Calculator
Tyre Pressure Calculator
Get a starting point for front and rear tyre pressures. For best results, use your total system weight (rider + bike + gear) and your tyre width.
Smart defaults will update tyre width unless you override it.
Minor influence, mainly for consistency.
mm
Using smart default
Measured width is more accurate than the sidewall label.
Rougher terrain generally suits lower pressure for grip/comfort.
Tubeless often allows slightly lower pressures.
mm
Wider internals can better support lower pressures.
Wet conditions may benefit from a small reduction for traction.
Recommended starting pressures
Front is typically slightly lower than rear.
Front
— psi
— bar
Rear
— psi
— bar
This tool provides suggested starting pressures only and does not guarantee safety or performance. Always follow the minimum/maximum pressure limits printed on your tyre and any wheel/rim manufacturer limits. Adjust for your equipment, riding style, temperature, and conditions. If you’re unsure, contact Mackay Cycles or a qualified mechanic. Incorrect tyre pressures can lead to loss of control, tyre/rim damage, or serious injury.