2.2 SmartWeight
®
 Balancing Technology 
SmartWeight
®
 Balancing Technology is a method of reducing forces on a wheel 
during balancing. This results in less weight used, and less time balancing tires. 
SmartWeight balancing technology is not a procedure. Instead, it measures the 
forces of couple side-to-side shimmy and static up-and-down shake and computes 
weight to reduce these forces. This reduces the amount of weight, reduces time, 
reduces check spins, chasing weights, and saves the shop time and money. 
SmartWeight balancing technology can reduce the number of steps in the balancing 
process. Not only does SmartWeight balancing technology give the customer a better 
riding vehicle, it also helps the environment by using less corrective weight, and 
speeds up the wheel balance process which saves the shop time and money. 
Static and non-rounding modes are eliminated to simplify operation. Always enter at 
least two weight positions during wheel measurement in SmartWeight balancing 
mode. All other functions are identical to the traditional balancing method. 
SmartWeight balancing technology will also compute the amount of weight saved 
over time. A histogram of weight savings statistics can be viewed from the “Logo” 
screen. 
Static and Dynamic Imbalance Sensitivity 
As a general rule of thumb, to achieve the best balance on an average sized tire and 
wheel assembly (15 inch rim): 
Residual static imbalance should be less than 1/4 ounce (7 grams). 
Residual couple imbalance should be less than 3/4 ounce (21 grams). 
Residual couple imbalance is preferred over remaining static imbalance. 
It takes much more residual couple imbalance weight to cause a vibration than the 
same amount of static imbalance correction weight. 
The larger the diameter used for weight placement, the smaller the amount of 
correction weight is required for static correction. 
The wider the distance between the two weight placement locations, the smaller the 
amount of correction weight is required for couple correction. 
If static balance is the only option, always verify that the remaining couple residual 
imbalance is within acceptable tolerance. This can only be verified using 
SmartWeight balancing. 
NOTE:  SmartWeight balancing performs this check automatically. 
For detailed information on adjustment and setup of modes of wheel balancing 
sensitivity see “Road Force® Measurement Procedures,” on page 81.
GSP9720JLR Wheel Balancer Operation Instructions  Introduction to Balancing 
 15