Going from a 195/65/15 to a 205/60/15 is actually what I recommend. If you want to calculate the error, there is a nice website that someone posted earlier.

http://www.paspeedo.com/calculator.htm

You if you type a speed of 100 mph, its basically taking the percentage difference, and you can see there is less then a 1.2% difference.

SAfe to say if you are doing 100mph, your speedo will be peg under 100mph. That means you ar doing 49.4 mph when it says 50mph. Not much of a difference at all. Enjoy.

__________________
Chirag (Charlie) Patel
--------------------------------------------
- 03 Mercedes S600 Sport TTV12
- 97 Acura NSX-T
- 99 BMW E36 M3 w/500+ HP
- 04 Lexus RX330
- 04 Dodge Dakota Quad 4x4 V8

4 Sale:
- 99 BMW M3 E36 Coup with Dinan SC, Upgraded to an RMS Stage 3 with Aftercooler, 12psi, and 500+hp @ flywheel.