7. Rotate the tire so the valve stem is higher than the
water level. With your valve core & core installation tool ready in one
hand, remove the washing machine hose from the valve stem and quickly install
the valve core.
8. Adjust the air pressure (always do this with the valve
stem above the water level).
9. Go back to step one and do the other tire.
How much water should I put in the tires?
I'd go at least halfway. On a 40" tire this equates to about 150lbs of
water. If you fill it any less than that the water will slosh around and
cause a lot of vibrations. With my tires filled halfway I can go about 50mph
before I experience vibrations.
How do I empty the tires?
You have to pull one of the beads off and dump the water out so if you don't
have beadlocks I wouldn't recommend adding water to the tires. If you have
beadlocks you can just pop off the ring and turn the tire over which will drain
most of the water. Then a shop vac or towel can be used to suck/soak up
the remaining water.
Note - If you want to adjust the water downwards you can rotate the tire so
the valve stem is at the new desired water level and pull the valve core.
Obviously the lowest you can get the water is to the bottom of the rim with this
Should I put water in the rear tires?
Filling the rear tires will make the rig much more stable but I don't believe
it buys you much as far as climbing performance. I wouldn't recommend it.
What are the downsides?