According to my tire diameter table (attached), the 205/70R14 tires have a
diameter of 652 mm, while the 195/60R14 tires have a diameter of 590 mm.
This means the 205s are about 10% larger in diameter, thus 5% larger in
radius, thus 15% larger in circumference (C=3.14xR).

If my math is correct, this would mean Jim's Passat would have a 15% error
in the odometer and speedometer if his new 205s were to replace his old
195s.  This would mean an indicated speedometer reading on the Passat of 60
mph would actually be 69 mph once the 205s were installed.

Budd Premack
86 Syncro, 73 Super
Minneapolis, MN (Land of Sky-Blue Waters)
Fw Tire Diameter Table.eml [application/octet-stream]