BUICK11 Posted May 20, 2012 Report Share Posted May 20, 2012 I have a slight vibration at 64 MPH on my 2001 DTS I have 4 Michelin tires. The best the tech could get was 7lbs on each tire. Just wondering what is ideal. I read somewhere that some want 4lbs on Caddy's. Does this mean my tires have to be replaced or can they be fixed? THANKS Link to comment Share on other sites More sharing options...
cdgrinci Posted May 20, 2012 Report Share Posted May 20, 2012 Do you mean 4 ounces (lead weight); seven does seem like a lot. Sometimes the tire can be rotated on the rim to help balance. Or are you referring to pounds that corresponds to the 'road force' reading; I'm not familiar enough with road force to know. Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
BUICK11 Posted May 20, 2012 Author Report Share Posted May 20, 2012 I am not familar with the workings of Road Force Balance but only repeating what the tech told me. Think he said 7lbs. Link to comment Share on other sites More sharing options...
Texas Jim Posted May 20, 2012 Report Share Posted May 20, 2012 In my opinion, if all of your tires are less than 7 pounds, you have a real good set of tires. Usually anything under 10 pounds, gives a real smooth ride. It may be possible that a wheel is slightly bent and causing a harmonic at that exact speed. Link to comment Share on other sites More sharing options...
BUICK11 Posted May 20, 2012 Author Report Share Posted May 20, 2012 Thanks. Need to investigate further. Link to comment Share on other sites More sharing options...
rockfangd Posted May 20, 2012 Report Share Posted May 20, 2012 7 oz. on each wheel sounds high. usually no more than 2.5 oz per side is ideal. most dont even take that. 7 oz on 1 rim would equal 3.5 oz per side. jus my opinion though. what kind of weights are being used? tap on or stick on? GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
Texas Jim Posted May 20, 2012 Report Share Posted May 20, 2012 7 oz. on each wheel sounds high. usually no more than 2.5 oz per side is ideal. most dont even take that. 7 oz on 1 rim would equal 3.5 oz per side. jus my opinion though. what kind of weights are being used? tap on or stick on? He didn't say 7 "OZ" of lead weights.... He said 7 "POUNDS" on the Road Force balancing machine.... which is a real good weight. Lots of tires are hard to get below 15 pounds. Link to comment Share on other sites More sharing options...
Ranger Posted May 21, 2012 Report Share Posted May 21, 2012 I am not familar with the workings of Road Force Balance but only repeating what the tech told me. Think he said 7lbs. http://www.gsp9700.com/intro/index.htm http://www.gsp9700.com/how/index.htm Link to comment Share on other sites More sharing options...
rockfangd Posted May 21, 2012 Report Share Posted May 21, 2012 i do apologize, I have some learnig to do regarding roadforce balancing as opposed to regular spin balancing. it is measured in pounds? Please tell me more. I dont know anyone around here that does roadforce balancing. Thank you GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
JohnnyG Posted May 21, 2012 Report Share Posted May 21, 2012 Yes, absolutley agree with what Texas Jim said, If you have your tires down to 7 lbs. road force, you've got a GOOD set of tires. I'd start looking for other issues too. UNFORTUNATELY the 64 mph speed at which this vibration is being felt is almost exclusively a tire problem of some kind. It is possible that you may be dealing with a belt seperation or twist, or even a balance variation in a different direction other than vertical. (radial, or in/out) Bent wheels should have been evident while the tire was being RF balanced since they do use the machine to check for the low spot and concentricity of the rim. Make sure your tire mechanic is giving you the correct data. Never underestimate the amount of a persons greed. Link to comment Share on other sites More sharing options...
Ranger Posted May 22, 2012 Report Share Posted May 22, 2012 i do apologize, I have some learnig to do regarding roadforce balancing as opposed to regular spin balancing. it is measured in pounds? Please tell me more. I dont know anyone around here that does roadforce balancing. Thank you For future reference. http://www.gsp9700.com/search/findgsp9700.cfm Link to comment Share on other sites More sharing options...
JohnnyG Posted May 22, 2012 Report Share Posted May 22, 2012 For future reference.http://www.gsp9700.c...findgsp9700.cfm Now that is a great link! Take a look at the "Straight Track" information located on some of the Hunter locations. It tells a whole different story about what MIGHT be happening in some cases. I can also see certain tire combinations causing a back and forth battle for lateral control. This is purely my wild thinking though. The main point is, there is a whole lot going on inside of tires and Road Force Balance really tells only part of the story. I'm certainly glad that there is a company like Hunter out there that is willing to do the difficult research that will eventually lead to a satisfied tire customer. Never underestimate the amount of a persons greed. Link to comment Share on other sites More sharing options...
rockfangd Posted May 23, 2012 Report Share Posted May 23, 2012 i do apologize, I have some learnig to do regarding roadforce balancing as opposed to regular spin balancing. it is measured in pounds? Please tell me more. I dont know anyone around here that does roadforce balancing. Thank you For future reference. http://www.gsp9700.c...findgsp9700.cfm Thhank you very much. I dont do business with anyone on that list so thats why I havent heard of it. wonder if there are others not listed. GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
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