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Discussion Starter #1
I have in the rear Mickey Thompson sportsmen radials 20"x18"x31" Im running 19 lbs of air and the out side of the tire area still is off the ground. Looking at the tire there is a very small tire patch area hitting the ground. How low of pressure can I go. This is street use for a pro street car

thanks
 

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Not the pressure answer but it sounds like the rim is too narrow for the tire you have on it if the pressures are that low and the outside of the tread is not touching the pavement.
 

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Discussion Starter #3
tires

There the recommended rim size there 15" wide. The inside of the tire seems fine its the outside last 1" May be the way its built not sure. Ill call MT and find out how low I can go
 
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