California
Super Star Member
- Joined
- Jan 22, 2004
- Messages
- 14,928
- Location
- An hour north of San Francisco
- Tractor
- Yanmar YM240 Yanmar YM186D
As I read that Goodyear description: They are describing how to do a 75% fill which includes seating the bead at 35 psi before and then after the liquid fill. Then reduce pressure to 1-2 lbs above recommended inflation pressure, lower the jack, and then make final adjustment of pressure.
Then they go on to say you might want to run 40% fill instead, for better ride quality and to control power hop. Your choice - maximum weight, or else lower water level to attain those other objectives.
I'll add a comment here - if you are filling direct from a garden hose, check the tire pressure frequently and bleed as necessary. You have 60-90 psi of water pressure available from the hose which could burst the tire if left unattended.
I made a simple tool for this.
One detail isn't obvious - before any water would come out I had to remove the little nub inside the head, the nub that presses on the tire's Schrader valve and is also a check-valve to keep air from leaking out when that head isn't on a tire.
Then they go on to say you might want to run 40% fill instead, for better ride quality and to control power hop. Your choice - maximum weight, or else lower water level to attain those other objectives.
I'll add a comment here - if you are filling direct from a garden hose, check the tire pressure frequently and bleed as necessary. You have 60-90 psi of water pressure available from the hose which could burst the tire if left unattended.
I made a simple tool for this.

One detail isn't obvious - before any water would come out I had to remove the little nub inside the head, the nub that presses on the tire's Schrader valve and is also a check-valve to keep air from leaking out when that head isn't on a tire.