When I bought my plane I found the airspeed indicator read high by quite a bit (this about bit me the first time I took off, the plane definitely was not ready to fly at the indicated speed the book calls out). I bought a new TSO'd airspeed, but I bought one that tops out at 160 mph. I think a 180 or 200 mph airspeed in a 150 is ridiculous - it forces the speeds at which we fly almost all the time into a very narrow area at the beginning of the dial. Spreading the graduations out makes it much easier to read and to read more accurately. This is like the 160 mph speedometers on many new cars, which is a pet peeve. The only "issue" is my custom range-marked airspeed now shows redline at 160 when it is supposed to be 164. I figure if I am going that fast, I am already dead, or soon will be.
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