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:
Hi Tony
Any chance you could send me some photos of your 15 inch wheels with the original 14 inch hubcaps?
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Tony Rinaldi
Sent: Saturday, January 04, 2014 1:02 PM
To: Chrysler 300 Club
Subject: [Chrysler300] New American Classic Tires
Hi To All Happy New Year,
Just opened the latest Hemmings MN Coker is advertising a new series of American Classic radial WWW tires that have bias ply look profiles. The American Classic Tire website does not show them as of yet.
They seem to be geared for Cadillacs, thunderbirds Corvettes.
Based on carnut.com "as built" specs for '55-'65 300s, C-300, 300-B 300-G owners may benefit from the 800:R15 tires if a 3 1/4" WWW works for you.
As with American Classic 235/75R14 235/75R15 radial tires, the white wall is an integral part of the tire. The 14" 75 series tires are for 1955-1960 unless owners opt for 15" wheels and tires.
Diamond Classic has S rated new Michelin 235/75R15 tires that they will put what ever size WW you want. They also promise the 235/75R14" tires soon by their own production.
BTW, I have the 15" Michelin tires from Diamond Back mounted on Stockton 15" wheels with the original 300-F hubcaps. They are great and exceed all expectations. One tire did develop "bead bubbling" of the white wall where it sealed to the rim. I had to pay shipping one way for a replacement WW. They did give me some grief since it they were over 1 year old.
American Classic Tires recommends "lug centric" wheels rather than the original "hub centric" wheels that may flex with radials.
Stockton Wheel will make up 14" modern "lug centric" replacement wheels or 15" that will accept 14" hub caps for radial tires. They are for 1957-60 and 1962-65. Their 15" wheels do not match 1961 300-G perforated wheels. They will not fit 1955-56.
Some narrow white walls are currently still available for 300-H and up.
All of this comes at a price! Hope Santa was good to you.
300,ly,
Tony Rinaldi
300-F Conv't
Sent from Yahoo Mail for iPhone
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Ray Jones. Y'all come on down an see us. Ya hear?
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