Not sure I understand the benefit of
Hubcentric - in reality, most wheels center on
lugs which are further from center and hence
better able to resist any movement as long as
they are concentric.
To be Hubcentric, you must have 2 things - first
hub must have a raised surface to register rim
and second, rim ID must be precisely correct
diameter for that specific hub. Many drum brake
applications do not have a surface raised to
register on. Further, many wheels have slightly
oversized and/or loose tolerance to accommodate
multiple applications - i.e. the ability to swap
aftermarket wheels for both Ford & Chrysler
application.
We had option to use Hubcentric Momo wheels
years back while racing - you had an oversized
center on wheel and used a set of application
specific adapters which precisely matched ID of
wheel and OD of the specific car. Never found
any real benefit so we did not use after first
few uses. Principal benefit seemed to be
precision in centering with respect to any
potential out-of-round of the mounted assembly.
No real benefit as to side loads which were the
predominant issue on race car as we never had
any concentricity issue with Momo or BBS wheels
with race tires.
I would suspect this recommendation is due to
some of the balance issues which have been
reported with some replica sizes and low
production specialty tires.
I would further note that belted tires (both
radial and bias-belted) are particularly
sensitive to belt alignment and manufacturing
tolerances. In 1968/69 when bias belted tires
became popular, only Goodyear had them and in
their haste to catch up, several of the other
big5 (Goodyear, Firestone, Goodrich, General,
and Uniroyal) had issues with their first
generation tires. When customers complained
about balance, we were instructed to check with
a radial runout gage and if more than a number
which I now forget, they were replaced no
charge. By about 1970, the production tolerance
issues were sorted out.
On 1/4/2014 8:07 PM,
Ryan Hill wrote:
Hub centric uses the actual hub to
center the wheel; the hole in the center
of the wheel fits snugly over the hub. Lug
centric wheels rely on the lugs only.
Sent from my iPhone
>American
Classic Tires recommends "lug
centric" wheels rather than the
original "hub centric" wheels
that may flex with radials.
Can you explain the difference ?
Ron
-----
Original Message -----
Sent:
Saturday, January 04, 2014 4:02 PM
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 |