|
One point as to "Lug Centric" vs "Hub Centric" - virtually ALL wheel balancers are set up for centering on the hub hole for balancing i.e. balancing will be "Hub Centric" unless you can find someone with an adapter to bolt to wheels and adapt to balancer. In general the wheels once bolted to the car are essentially controlled by lug nut bolt circle and lug nut taper or in the case of mags, the precision of the shouldered lug nuts. They are therefore "Lug Centric". As long as the wheel manufacture is precise with respect to lug hole pattern concentricity relative to the center (hub hole), there should not be a problem as there is no meaningful difference. All this assumes the basic wheel and the wheel/tire assembly are otherwise "true". I think the recent advocacy for "Lug Centric" balancing reflects on tolerance issues in wheels - particularly those such as the Magnum 500 Road Wheels that do not have a conventional hub ID and hence present some balancing issues - particularly if forming of back of wheel is less than perfect. These generally come with a note as to Lug Centric balancing - a term which many if not most tire shops do not recognize or do not have the inclination to deal with as it costs significantly more time ($) even if you have such an adapter. And of course if you really want a precise balance, including any small imperfections in your drums or rotors, you should have the tires balanced after they are mounted on the car and rebalance every time you rotate them. This was not that uncommon in the late 60's and throughout the 70's. Prior to the advent of belted tires and especially steel belted radials, a static balance was adequate for most cars (and yes this included virtually all of the Letter series 300's). The advent of belted tires brought an increase in mass at the largest diameter which has a greater effect on balance. But more significantly, the early belted tires - both bias-belted and radials were sometimes prone to belt alignment issues - particularly those bias-belted tires that were built on 1st generation tire building equipment hurriedly modified because everyone was trying to either catch up or stay ahead of everyone else. Goodyear had spent the time and research to get the Bias-Belted right and Michelin and BFGoodrich had the lead in Radials. But as manufacturing precision improved (both tires and the other components - but mostly tires as the steel belted radials have more mass at the greater diameter), the need for such extreme measures has decreased. In fact, current mass produced tires and wheels very rarely need more than a good spin balance using a "hub centric" for lack of another term process. Best, Ed On 3/9/2014 2:47 PM, Larry Jabin wrote:
__._,_.___ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang __,_._,___ |
Back to the Home of the Forward Look Network
Archive Sitemap