Don't know about the rest of you but I've
got the 250/60/15 tires on my car and I had it recalibrated a while back. I testet it with my gps and there was only a mile difference in speed readings throughout the range of speed. My little Z'
cut off right at 110 on speedo and 111.7
reading on the gps. I'd say it's closer to 112 then.