Do Lower Profile Tires affect Speedometer Reading

[Kneale Brownson]

Minimal speedo difference, but for snow, it's recommended to go to the
slightly taller tire.  So you should be getting 195 65 R15.  


At 08:03 AM 11/9/2005 -0500, mboucher70 at hotmail.com wrote:
>I'm looking at a pair of 'performance winter' tires.  The size is 195 55 R15.
>
>My car's original equipment is 205 60 R15.
>
>I've read that for winter you should change the sizing by one each - that is 
>either
>
>205 60 R15 or
>195 65 R15 or
>185 70 R14 if load capacity allows.
>
>I'm a bit confused by this rule.  I understand that the tire profile change 
>is ofset by a rim size change.  So then, wouldn't 205 60 R15 and 195 65 R15 
>give different speedometer readings, since the rim size is the same but the 
>profile is different?
>
>Bottom line question is will moving from 205 60 R15 TO 195 55 R15 work on my 
>car (1990Audi100) or will it change my speedometer readings?
>
>Other question, where is a good place to get inexpensive winter rims 
>(Wal-Mart, etc)?  It uses 6Jx15 rims.  Are these standard rims, or 
>specialized Audi rims?  I've noticed that most Audis use the 5-bolt tires, 
>but mine uses a 4-bolt.
>
>Thanks
>
>Charles
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