Originally posted by :exnbp:
What is a pyrometer? And how does it work. I'm quite interested 
A pyrometer measures temperature.
You use it most on your tires. You want even temperatures across your tire which means you are using the whole tire effectively. If the shoulders are hot then you need more air, if the middle is hot then you need less air. Then you adjust the rear tire pressures to suit your driving style. More or less rotation.
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