255 x 15" rim - tyre sidewall size?

7 replies [Last post]
Tue, 02/09/2014 - 13:09
jerrytherigger
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Hi,

I have recently started on g-wagons with a 1988 LWB 280GE.

It currently has 255 / 75 R15 (Goodyear) tyres on (I think)  7J x 15 H2 wheels.

Q. Is this the correct (standard) tyre size for this vehicle?

I am having some difficulty sourcing this size of tyre. Have been advised that a 255 / 70 / R15 tyre is more commonly available with better choice of manufacturers and have been offered this as an alternative.

Q. if 75 is standard... would dropping to 70 in the side wall cause any problems?  (with transmission or transfer box)

any help appreciated

thanks 

jtr

 

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Tue, 02/09/2014 - 19:39
#1
needamerc
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Re: 255 x 15" rim - tyre sidewall size?

I have used 31x10.5R15 (which is a BFGoodrich size and I'm sure other brands) on those rims.

That converts to approx 270/75R15.

Useful converter here:

http://tire-size-conversion.com/tire-size-converter/

Remember the "75" in the metric size is a percentage of the tyre width, not an actual measurement. 

 

Eddie.

 

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Tue, 02/09/2014 - 19:41
#2
panzer
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Re: 255 x 15" rim - tyre sidewall size?

I believe 255 / 75 / 15 r is the standard tyre size on the 15" wide alloy and is = to 30" x 9.5" x 15". you may find the " tyres easier to source.

You may want to consider 31" 32" or even 33" tyres but a 70 profile will give you a smaller diameter and that may not be a good idea.

No doubt expert advise will follow my post.

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Tue, 02/09/2014 - 23:12
#3
G-Restorations
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Re: 255 x 15" rim - tyre sidewall size?

This file may help,   just a little gearing & tyre size calculator i wrote

http://www.pxwheels.com/gearingcalc.xls

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Thu, 04/09/2014 - 16:21
#4
jerrytherigger
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Re: 255 x 15" rim - tyre sidewall size?

Gordon,

thanks for the spreadsheet

jtr

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Thu, 04/09/2014 - 16:24
#5
jerrytherigger
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Re: 255 x 15" rim - tyre sidewall size?

Eddie, Panzer,

thanks for your replies and comments.

have been advised that a 265 / 75 R15 is a good fit for this rim and seems to be a much more common size.

jtr

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Fri, 05/09/2014 - 10:16
#6
needamerc
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Re: 255 x 15" rim - tyre sidewall size?

Go BFG. They last years.

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Fri, 24/10/2014 - 17:43
#7
LEONIDAS
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Re: 255 x 15" rim - tyre sidewall size?

Hi ,

I had the same problem trying to replace the Good Year Wranglers 255/75/15 . ( 15 years old, but with plenty of tread left)  Apparently this size is discontinued.  I had to settle for Bridgestone Duelers 31/10.5/15. Much quieter and road friendly. So far very pleased with them.

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