Equal, a product made by IMI Products Inc. [(717) 264-5819,
www.imiproducts.com] is a dry, granular polymer. This sandlike compound is placed inside the tire where it is forced outward by centrifugal force as the tire spins. Following the laws of physics, it distributes itself more heavily at the lighter spots of the tire. This brings the tire into balance, reducing vibration levels of the tire and wheel assembly.
Unlike some of the liquid compounds used in tires, Equal is not a tire sealant and does not adhere to the tire liner. It does not absorb moisture and will not harm tire or wheel surface areas. Equal is non-toxic, non-hazardous and requires no special disposal. It is easily removed when a worn tire is dismounted for retreading or disposal.
Equal is installed by placing a self-opening bag — containing a specified amount of the product tailored to the tire size — inside the tire at the time of mounting. If the tire is already mounted, Equal can be installed through the valve stem using a special installation tool called the Equalizer.
Bridgestone says:
These golf balls were ruined by running inside a truck tire for several thousand miles. They also probably did irreparable damage to the tire.
The user had a ride disturbance and heard that a few golf balls inside his tires
would correct it, by automatically positioning themselves to counteract the vibration.
We often hear of home-brew solutions like these, but we can’t recommend them. Here’s why: First, in this case, it didn’t work very well. The ride disturbance and vibration continued.
Second, notice how dirty and black these golf balls are? What’s covering their surfaces is rubber, of course — from the innerliner of the tire.
The innerliner is a specially made, multilayer component, with the important job of preventing air from getting through it and escaping. The rubber dust coating on these golf balls came from their banging into the innerliner, probably damaging it.
We’re not sure what caused the balls to change shape so radically. Perhaps high heat and high-speed collisions with the wheels?
Anyway, as we said, we can’t recommend golf balls as a means of balancing truck tires. So far as we can tell, they don’t work and could seriously damage your tires.