Yeah, that's always a hard one. The biggest challenge may be to get an
accurate figure on a 165-14. A tire store might have that information. But
if you can do that, then you can go to someplace like the TireRack Web site
and look at the specs for different tires and see how close you can get.
For example, here's the spec page for a Pirelli P400 Touring:
http://www.tirerack.com/tires/Spec.jsp?make=Pirelli&model=P400+Touring
Comparing it's 175/70-14 to some other tires in the same size, it appears
that these are about 23.5-23.7" in diameter and run 876-894 rev/mi (I can
see my rev/mi calculation is low, since it doesn't take into account
deformation of the tire at the ground).
And just for you, Dave, I've added 165 to the list of sizes on my calculator
page.
BTW, Coker Tire (http://www.cokertire.com/) has a 5.60-14 BFG listed, so you
should be able to find that through a BFG dealer.
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of David R.
> Conrad
> Sent: Friday, January 09, 2004 7:16 PM
> To: Roadster List; Gordon Glasgow
> Subject: Tire Size/RPM's
>
>
> Gordon and List:
>
> I am (again) visiting the matter of tire size
> specifically as it relates to 'stock'
> speedometer/odomoter indications.
>
> More than a year ago, I received a lot of useful
> information on the subject (much of it from Marc Sayer,
> whom I haven't seen on the list for quite a while).
>
> Anyhow, all of it was lost by way of a hard drive crash
> which I experienced 'less than' a year ago.
>
> I want to replace Dunlop 165 SR 14s with a size, which
> closely as possible, duplicates the "revolutions per
> mile" which I see, using that discontinued size. Not
> satisfied with 175 70 14s, which aren't very close in
> that regard.
>
> Your 'Tire Calculator' contained in the 'Shop Area' of
> Gordon's Garage is very useful, but it doesn't contain
> info for the discontinued size (nor the original
> equipment 5.60-14).
>
> I would appreciate info on this subject from anyone who
> knows.
>
> Thanks!
>
> Dave
> '68 1600
> Kailua-Kona
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