Road force measurement balancing

[Power Surge]

Road force basically measures how out of round the wheel assembly is. First you measure the spinning tire, which measures the assembly. Then you use the sensor arms to measure the rim itself (while still on the tire). If you have high spots and low spot in both the tire and rim, the machine will tell you where to spin the tire on the rim so that the high spots and low spots cancel each other out, giving you the least amount of overall runout.

Typically we consider 15 and under acceptable for a car wheel. 33 is very high. I had huge shaking issues with my Cobra wheels and after I took the car to work and road force balanced the wheels, it was like a whole new car.

[flapjack]

Hi All,
This is my first post. I worked for an Audi dealer up until recently and now work for a Lexus dealer. Chances are that there is some runout in either the tire or rim. A Road Force measurement of 6lbs is exceptionally good. I would ask the service rep. for an explanation as to what is marginal. Chances are it will be fine at 6lbs. I would only suggest R/forcing a wheel assembly after a tire has seen some use. Tires take time to seat properly and to break in. I have done comparisons regarding this. Also make sure that when mounting tires that both the rim and tire bead are both lubricated and inflate to no less than 40 lbs. when seating. You would be surprised as to how many times a new tire shows poor Road Force measurements due to the fact it was'nt seated properly.

Good Luck,
Flapjack