BIG SCOOTER

al, no need to yell, lower case letters are fine.

Knowing the weight of the scooter doesn't tell us what the required air pressure is. However, your scooter should have a sticker on it somewhere that tells you what the correct pressure is. It maybe under the seat, might be inside a dashboard storage box, or could be on the swingarm or frame. The sticker should list the maximum weight of the scooter plus passengers and cargo, and also lists the recommended tire pressure.

You can also look at the tires themselves, they will have a Maximum air pressure listed on the sidewall. The recommended pressure is generally quite a bit less than the maximum, so don't fill the tires all the way to the max, but you might try filling to 10lbs lower.

A good rule of thumb is 10-15% lower than the maximum listed on the tires. 10lbs lower is often fine, but when the tires are just barely large enough for the weight it can be a little too low. If I were to give a general figure in PSI it would be 5lbs lower. Those of us who try to maximize range run at or just below the maximum.

Leftie,

I thought it was the other way around - over-inflate slightly to have lower rolling resistance. e.g. the hypermiler recommendation is to do over-inflation. Under-inflated tires are also a safety risk aren't they (depends on how far under-inflated).

Leftie,

I thought it was the other way around - over-inflate slightly to have lower rolling resistance. e.g. the hypermiler recommendation is to do over-inflation. Under-inflated tires are also a safety risk aren't they (depends on how far under-inflated).

David -

Some people go higher than what the vehicle manufacturer lists for the vehicle. However, I don't believe anyone should go higher than what the tire manufacturer lists on the tire itself.