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Re: Tire Mounting

To: Triumphs <triumphs@autox.team.net>
Subject: Re: Tire Mounting
From: "Power British Performance Parts, Inc." <britcars@powerbritish.com>
Date: Fri, 22 Sep 2000 08:32:50 -0400
References: <NCBBLEANCLBHFFBMKPGNKEHMDBAA.RSwift@AVMTOnline.com>
Rob C Swift wrote:

> Hello All,
>
>         Has anyone had any trouble with tire dealerships refusing to mount 
>tires on
> stock TR6 rims?  I just had a local dealer refuse because the rims lack a
> safety ridge to keep the tires from pushing inward.  They say that I must
> use inner tubes to be correct (safe).  I know that the BF Goodrich's that
> were on the car previously did not have tubes in them, and I never had a
> problem.  Do I need to ask for inner tubes, or is this just something that
> the big tire companies lawyers are making them do?
>
>         Also, I am planning on putting on 195/60/15's on.  I know that to be 
>as
> close to the orig. overall tire diameter as possible I should use 195/65's,
> but I am thinking that I will like the performance and looks of the 60's
> better.  Will there be a noticable difference in speedometer accuracy?  Or
> for that matter, am I just fooling myself on the difference in performance?
>
> Rob Swift
> '75 TR6

Hello Rob,

Try another shop to mount your tires.  You should have no trouble using 
tubeless tires
on the stock TR-6 rim.

However, I would like to mention that your choice of tire size may not be as 
close to
the stock diameter as you think.  By my calculations, 195/60-15's will be an 
inch
shorter in radius (2" in overall height) compared to the stock red-line.  I 
recommend
using 205/70-15's as that size in nearly identical to the stock red-line rolling
radius.  There is nothing wrong with using a smaller diameter tire, but as 
Scott said,
your speedometer will be off - reading higher than your actual speed as a 
result of the
smaller diameter.

Good luck!

Brian Schlorff
Power British
http://www.powerbritish.com/~britcars


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