| I've used a Hunter RoadForce GSP9700 for a long time and know most of the features inside and out. You should leave the shop with a printout for each wheel/tire combo showing the before roadforce measurements and after. You run the road force and if it detects an excessive amount of road force it will prompt you to check the wheel runout. If the wheel is OK it will show you where to force match the tire to the wheel. Then you run again, check results and repeat until you can get a road force result within limit. The shop I worked at charged two hours for this procedure and sometimes it took longer. There are some wheels/tires that won't ever get within acceptable range due to defects and we sent them back for warranty if they were new. There are also some tricks to running the machine, sometimes it will tell you it can't fix the road force and you just spin the tire on the wheel 180* and suddenly it can tell you where to force match for good results. I know 100% that there is a huge difference on a vehicle that has a road force balance compared to standard balancing. Typically I've seen Michelins have great readings less than 10lbs. You can occasionally get close to 0lbs.
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