On or around Thu, 15 Sep 2005 14:22:10 +0300, "Pantelis Giamarellos"
<pantg@otenet.gr> enlightened us thusly:
>People Hi,
>
>
>Mainly interested on the diameter and circumference and ordinary tyre size
>comparison for a 35 X 12.5 X 17" tyre but a chart would be extremely
>helpful.
>
>I know for example that a 235 X 85 X 16 tyre is the same size as a 33 X 11.5
>X 15 tyre but that is all.
case 1: crossplies. typical size: 7.50x16. rim is 16" diameter (the bit
the tyre mounts on, natch) and the tyre nominally both 7.5" wide and tall.
hence overall diameter is 16+7.5+7.5 = 31".
case 2a: "standard" radials, in EU mostly. typical size: 205R16. rim is
16", tyre is nominally 205mm wide and 82% of 205mm tall. overall diameter:
16+(205*0.82*2/25.4) = 16 + 13.2 = 29.2"
case 2b: radials with other profiles: typical size: 235/70R16. rim is 16",
tyre is nominally 235mm wide and 70% of 235mm high. as above, o/d is
16+(235*.7*2/25.4) = 16+12.95 = 28.95"
case 3: american-style size radials: typical size: 31-10.5R15. rim is 15",
o/d of tyre is 31" nominal, width of tyre 10.5" nominal.
you mention 235/85R16 - o/d for this is 16+(235*.85*2/25.4) = 16+15.7 =
31.7"
closest match in US-style size on 15" is 32-9.5R15
I guess I could have a crack at a chart, at that. gimme a few days, if
no-one comes up with one.
--
Austin Shackles.
www.ddol-las.net my opinions are just that
"The great masses of the people ... will more easily fall victims to
a great lie than to a small one" Adolf Hitler (1889 - 1945)
from Mein Kampf, Ch 10
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