So I needed all 4 new tires, and a buddy of mine had a nice 4 set of 195/60/14 My car calls for 185/75/14 (91 Honda Accord LX)

I was told this would make my speedometer read 65mph and when actually doing 60. Is this true? Should I know drive at 70 when the speed limit is 65?

 

There's more adverse effects then just your speedometer/odometer being off. Your handling and braking characteristics will also be effected, and could make the car more unstable at speed.

As for a sizing difference, they're going to make your speedometer off 4.24%. Should you be attempting to drive 65, you need to be driving an indicated 67.75mph.

 

185/70R14 was the original
Going from 185/70/14 to 195/60/14

 

My calculations are with actual original tire size. I noticed the typo.

 

So what would be speed compensation be?

 

As I said, I noticed your typographical error.

 

Just making sure, I figured your calculations were wrong considering I gave you the wrong numbers, and thus correcting them would give a different speed compensation. My bad.