datsun-roadsters
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RE: 5.60 - 14 tires

To: bob_wilson@agilent.com, csp311@telia.com
Subject: RE: 5.60 - 14 tires
From: "sidney raper" <spl310@hotmail.com>
Date: Mon, 28 Aug 2000 20:12:35 EDT
All,

The Coker Tire catalog gives these dimensions, but the web site does not.  I 
cannot lay my hands on my catalog right now, but they DO sell the 5.60-14 
tire in a few different whitewall widths.  Check them out at www.Coker.com

Sid


>From: bob_wilson@agilent.com
>Reply-To: bob_wilson@agilent.com
>To: csp311@telia.com
>CC: datsun-roadsters@autox.team.net
>Subject: RE: 5.60 - 14 tires
>Date: Mon, 28 Aug 2000 17:23:03 -0600
>
>Thankyou Thomas!
>
>Now this tire stuff is making sense.  Below, Thomas found a
>cross reference from Michelin that lists the OD of our 5.60-14
>as 628mm or 24.7".  Since it is not a radial, the assumed 78%
>is wrong.  However, it is not 100% either or the final tire od
>would be 5.6" x 100% x 2 + 14 = 25.2".
>
>It might be nice if someone else could find another (independent)
>cross reference that states the OD of a 5.60-14 non radial tire.
>But if we assume that this is correct, then it becomes easier to
>pick a new tire and wheel and then to know the resultant effect
>on our speedometers.
>
>So, as of now, I am assuming our stock 5.60-14 tires have (had) an
>od of 24.7"
>
>Outside Diameters of several tires and wheels:
>
>185/60-14 is 22.7"
>185/70-14 is 24.2"
>195/60-14 is 23.2"
>195/70-14 is 24.7" <--- Close Match
>
>185/60-15 is 23.7"
>185/70-15 is 25.2"
>195/60-15 is 24.2"
>195/65-15 is 25.0"
>
>
>Bob Wilson
>
>
>
>
>-----Original Message-----
>From: Thomas [mailto:csp311@telia.com]
>Sent: Monday, August 28, 2000 2:50 PM
>To: bob_wilson@agilent.com
>Subject: Re: 5.60 - 14 tires
>
>
>I checked Michelin size conversion chart from crossply
>to radial tires. They list 5.60-14 (it's not a radial tire
>without the R) at 628 mm or 24.7 inches (rounded off
>to 1 decimal) 5.60 inch wide is 142 mm as there were no
>low profile skinny tires in the early 60's the ratio is 1:1. One
>of the first 70-profile radials were Michelin XWX (remember
>them?) in the late 60's. A modern radial tire is 80-profile or
>78-profile unless there's a different profile included in the tire
>size.
>
>Using a modern tire on a Roadster I agree with some of the others.
>You have to make a compromize between tire diameter and width.
>185/60-14 or 185/65-14 will fit the Roadster perfectly with 5
>to 6 inch wide wheels. You will get a lower car but it will handle
>better and they will not rub on the fender lips with proper offset
>wheels. The widest I have seen on a Roadster was 215/45R-17
>without flares.
>
>If you want everything 100% original, the 5.60-14 are still made.
>Vintage tire suppliers recommend 165R-14 as radial replacements.
>
>Thomas
>
>PS. I dont want to make anyone confused.
>
>
>bob_wilson@agilent.com skrev:
>
> > Well, to you tire experts, I am still quite confused.
> >
> > 155/70-14 calculates to 22.54"  (155mm=6.102" 6.102*0.7=4.27 4.27*2=8.54
> > 8.54+14=22.54")
> >
> > Yet William says this should be 23.5"
> > Thomas says it is 645mm or 25.39"
> > Dan said he used 175/70-14 or 23.65"  (and this was the best match to
> > original)
> > I calculated 5.60-14 to be 22.74"
> > Thomas Walker suggests a 185/60-14 or 22.74"
> >
> > William says below that anything over 24" will hit the fender lips
> >
> > How about I just average all the answers and try to match that!!!
> > Just kidding.  I'd like to go with Thomas Walker (if that is his final
> > answer) since
> > the 185/60-14 seems to match the 5.60-14 perfectly but then Thomas [not
> > Walker] says that I am not correct in using 78% for the 5.60-14
>calculation.
> > So I'm back to square 0.
> >
> > Still confused.
> >
> > Bob Wilson
> >

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