At a load of 70-90kg: the front wheel is 40-45psi, the rear wheel is 45-55psi.
At a load of 90-100kg: the front wheel is 45-50psi, the rear wheel is 50-60psi.
At a load of more than 100 kg: it is recommended to pump up to 50-55psi front and 60-65psi rear, but careful driving is recommended.
The risk of puncture increases with weight gain.
taken from:
