Excessive road force on tires

[parts+]

We are using the Hunter DSP 9700 wheel balancer and are experiencing excessive road force variation,over 14lbs, in a lot of our tires. How critical and accurate is this measurement and is there any fix for the tire if it is over the suggested guidelines?

[MMorris]

The tire balancer in question measures not only RFV, it also measures wheel runout.

The screen then directs the user as to whether or not spinning the tire on the rim will lower RFV to acceptable levels.

The tire mfg's are all telling us that when we get new tires that fail due to excessive RFV, hold on to them and wait for a suitable rim for matching.

Our Hunter rep is extremely helpful in training on the use of the equipment, ask your rep if you have any questions.

Hope that helps

[mark vandersteeg]

i talked to the gm engineers in detroit and asked them how come we were having such a problem with tires. they said that the newer gm trucks and luxury cars are made so stiff and rigid for ride quality that they are extremely sensitive to r.f.v. we have found that depending on how "tuned-in" the owner is to r.f.v. we may have to sort through 13 or 14 tires to find a set acceptable. most michelin tires are less than 10# right out of the box. we have had several buy-backs because of r.f.v. concerns and our rep. has bought some of them michelins to console them. tires haven't changed, vehicles have changed. depends on the owner as to whether or not you have a problem but you'll never know for sure if it's r.f.v. without spending $$$ for a balancer.