spridgets
[Top] [All Lists]

Re: Tire selection for my MG

To: "William M. Gilroy" <w.lists@verizon.net>
Subject: Re: Tire selection for my MG
Date: Tue, 9 Sep 2003 09:23:24 -0400
Cc: spridget list <spridgets@autox.team.net>
References: <3F5904CF.4080305@verizon.net> <3F5DC99D.4000202@verizon.net>
Bill, I believe 82 is closer to being correct. I always thought it was 
85. Bit 100 sounds too far out.

Larry

On Sep 9, 2003, at 8:37 AM, William M. Gilroy wrote:

> William M. Gilroy wrote:
>
> Below is a message I received from Phil.  The question to the list is 
> he
> correct?  I just assumed that that the profile size was 100.  Anyone
> care to shed any light on the issue?  Also at the bottom is a new table
> of sizes and the original from my first post, there is a large
> difference.  Which is correct?
>
> Bill Gilroy
>
> ------ Phil Profili's message  Phil.Profili@cptii.com
> <mailto:Phil.Profili@cptii.com>  ---------------------
>
> Bill,
>
> Are you sure that the originals are really 100 profile?  I always 
> thought that the "SR" labeled tyres were 82 profile which, if true, 
> throws your numbers out a little.
>
> I think the 165/70 is the closest in size to the originals, if I'm 
> correct on the 82 profile thing.
>
> The only comment I would make is that if you have square wheel arches 
> (which you probably do, if yours is a stock '77), you may encounter 
> some rubbing with anything over a 165 width tyre.  The 1500s sit 
> higher, so you may be OK.  I have 175/60s on mine and I fitted a 
> Panhard Bar to get around the rubbing.  My car is very low, so it 
> sometimes still rubs, depending on who I have in the passenger seat 
> (!).  I will be converting it to round wheel arches some time in the 
> near future, partly to get around the problem for good and partly 
> because I like the look.
>
> Phil
>
> --------  End message --------------------
>
> There is a large difference.  Her are the new numbers:
>
> *New Tire Size Comparison w/ 82 profile*
>
> Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  
> Difference
> 145/82-13         4.7in  11.2in    22.4in         70.3in        902    
>     0.0%
> 155/82-13         5.0in  11.5in    23.0in         72.3in        877    
>     2.9%
> 155/80-13         4.9in  11.4in    22.8in         71.5in        886    
>     1.8%
> 165/65-13         4.2in  10.7in    21.4in         67.4in        940    
>    -4.1%
> 165/70-13         4.5in  11.0in    22.1in         69.4in        913    
>    -1.2%
> 175/60-13         4.1in  10.6in    21.3in         66.8in        948    
>    -4.9%
> 175/70-13         4.8in  11.3in    22.6in         71.1in        891    
>     1.3%
> 185/55-13         4.0in  10.5in    21.0in         66.0in        960    
>    -6.0%
> 185/60-13         4.4in  10.9in    21.7in         68.3in        928    
>    -2.8%
>
> Now here are the old one:
>
> *Original Tire Size Comparison w/ 100 profile*
>
> Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  
> Difference
> 145/100-13         5.7in  12.2in    24.4in         76.7in        826   
>      0.0%
> 155/100-13         6.1in  12.6in    25.2in         79.2in        800   
>      3.2%
> 155/80-13         4.9in  11.4in    22.8in         71.5in        886    
>    -6.8%
> 165/65-13         4.2in  10.7in    21.4in         67.4in        940    
>   -12.2%
> 165/70-13         4.5in  11.0in    22.1in         69.4in        913    
>    -9.5%
> 175/60-13         4.1in  10.6in    21.3in         66.8in        948    
>   -12.9%
> 175/70-13         4.8in  11.3in    22.6in         71.1in        891    
>    -7.3%
> 185/55-13         4.0in  10.5in    21.0in         66.0in        960    
>   -13.9%
> 185/60-13         4.4in  10.9in    21.7in         68.3in        928    
>   -11.0%
>
--
Larry B. Macy, Ph.D.
macy@bbl.med.upenn.edu
System Administrator/Manager
Neuropsychiatry Section
Department of Psychiatry
University of Pennsylvania
3400 Spruce St. - 1015 Gates
Philadelphia, PA 19104

  I have great faith in fools - my friends call it self-confidence.
  - Edgar Allen Poe


///  unsubscribe/change address requests to majordomo@autox.team.net  or try
///  http://www.team.net/mailman/listinfo
///  Archives at http://www.team.net/archive


<Prev in Thread] Current Thread [Next in Thread>