^^^ I agree 100%. This $17 filler and gauge is NO substitute for a Legit gauge when tire pressure by 1-2 pounds is Critical like in motorcycle racing. You can always use El Cheepo to get I. The ballpark and then use a Legit on to double make sure
For motorcycle racing here is what my buddy uses. Even with this Legit gauge he says he even uses a 2nd one to make sure his first one is telling the truth. I guess when your going 150 Mph on 2 wheels inches off the ground and your life depends on it your more skeptical