If you're going to try to use an infrared thermometer you have to understand their limitations as there are many things that affect their accuracy and if the parameters aren't tightly controlled you will get inconsistent data which will lead you down a road that will be frustrating at best. Your results will suck. Even the timing of when you do temperature checks will heavily influence data. If you're doing a cool-off lap you can forget about getting any useful data because your tires will be doing exactly that: Cooling off. Length of the track, your speed and track temp will all influence this. The best you can hope for to pull in directly off the track into hot pit and have somebody ready to check temps immediately without even putting the bike on stands. However measurements will still not be consistently accurate or precise. If you want to get more consistent results you'll need a pyrometer and not an infrared thermometer. Here is a video on the definitions of accuracy and precision and why both are important: Accuracy and Precision | It's Easy! - Bing video Pneumatico is right. If you want the most useful data you need onboard infrared temp sensors. Your IR gun is at best a tool for relative measurements in this case. However, if you want to continue working with checking temps with your IR temp gauge then make yourself a tool that will fit on the gauge and will hold the gun perpendicular to, and at a fixed distance away from the tire surface. This will give you the most consistent results from the gauge itself.