On Tue, 30 Apr 2019 03:13:12 -0000 (UTC), "Arlen G. Holder"
wrote:
On Mon, 29 Apr 2019 17:01:19 -0400, Clare Snyder wrote:
IF thare there, they virtually ALWAYS have the same meaning - and
thee cheaper the tire the more critical it is. (in other words- HIGH
QUALITY tires don't have significant runout - OR significant
inballance. - so the significance of the match marks is less.
Hi Clare,
Thanks for that reference where I found some references literally _stole_
my pictures, which I take as a compliment! You'll recognize my tires, and
my tools in some of the references below, for example.
As I noted prior, I could have sworn that we used to mount the red dot next
to the valve stem for basic stock steel wheels, where I see you found one
of the old references which mentioned that practice of aligning the valve
stem to the red dot.
I found others which both confirm and deny that assumption, so I have some
homework to do to catch up on what I thought I had known so I hadn't
bothered to look it up recently until now.
For now, we'll assume the meaning of the two colored dots are described
here where "red" === "uniformity" and where "yellow" === weight.
https://www.yokohamatire.com/tires-101/advanced-information/match-mounting
Bear in mind each manufacturer can use different colors, or no dots as
explained here in this canonical Bridgestone summary:
https://forums.redflagdeals.com/f-y-i-meaning-yellow-red-dots-tires-1378801/
OK - find any credible reference showing the use of yellow and red by
ANY other manufacturer where the colors are switched. ANY. I'm
throwing you the challenge. Remember - it has to be a CREDIBLE
reference - from someone who is guaranteed to know more about the
subject than you - in other words not a hobbyist - but someone
intimately familliar with the company involved.
Are you up for the challenge Mr Holder?
Not saying it isn't out there, or that you won't find it - but I've
never seen it. Mabee someone used green and orange, or white and
yellow, or white and red. - happy hunting.
https://www.motor.com/magazinepdfs/042008_09.pdf
For decades, it was common practice
in the aftermarket to mount a tire so its
red dot aligned with the wheel’s valve
stem, since the valve stem area was normally
assumed to be the wheel’s lowest
point of radial runout.
Given that reference which you kindly unearthed, I'm not sure which way to
go forward, bearing in mind these aren't custom wheels; they're plain jane
stock steel cheap wheels (but where I also work on the BBS alloy wheels).
Consequently, a procedure that was
once easy has now become complicated.
Here are the articles I'll read to make the decision, all over again,
whether to align the stem to the red or yellow dot, and/or to set up a jig
for checking the high point and low point in radial runout, although, at
home, it would be only static.
This is the canonical publication which no longer seems to exist:
http://www.bridgestonetrucktires.com/us_eng/real/magazines/ra_v13_i1/PDF/ra_v13i1%20ask%20doc.pdf
This seems to be a summary:
https://forums.redflagdeals.com/f-y-i-meaning-yellow-red-dots-tires-1378801/
Red dot === valve stem
Yellow dot === valve stem
o Mounting & custom wheel handling
https://www.motor.com/magazinepdfs/042008_09.pdf
Old method, red dot === valve stem
New method, yellow dot === valve stem
o Bridgestone Tires Red & Yellow Dots
https://www.car-auto-repair.com/tires-balancebridgestone-tires-red-yellow-dots/
Red dot === valve stem (red dot supercedes yellow dot)
Yellow dot === valve stem
o Yokohama mounting procedures
https://www.yokohamatire.com/tires-101/advanced-information/match-mounting
Red dot === not possible at home
Yellow dot === valve stem
o Tire Rack match mounting
https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=17&
This explains my comment about OE wheels & tires most needing the dots.
o Red & yellow dots
https://www.tires-easy.com/blog/what-are-the-red-and-yellow-dots-on-my-tires/
Yellow dot === heaviest spot
Red dot === lightest spot
o Continental "coloured dot" markings on car tyres
https://blobs.continental-tires.com/www8/servlet/blob/554548/e3119edf9831c33103e5a771a0fe5717/download-coloured-dot-markings-data.pdf
This one says there's no consistent color for weight but
that there is a consistent color for unifornity (red).
o Match mounting
http://www.livjones.com/2014/04/match-mounting-red-dot-on-tires.html
Red dot === valve stem (red dot supercedes yellow dot)
Yellow dot === valve stem
o Match mounting
https://volvoreview.com/read/tire-mounting-red-yellow-dot
Red dot === valve stem (red dot supercedes yellow dot)
Yellow dot === valve stem
My belief system is based on facts, where I've noticed that most people
seem to have imaginary belief systems, but where, when it's complicated,
then any belief system that works, is fine.
Hence, for now, I'm gonna stick with the old method of red dot === valve
stem, unless there is no red dot, and then yellow dot === valve stem,
unless we can unearth a definitive reference that soundly refutes those
above.
Thanks for keeping an open mind, as you're the only other one on this ng,
that I know of, who has actually mounted & balanced a car tire themselves.