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You know your car better than anyone but ..

20 lbs sounds like an awful lot to me ??

What does MFG recommend ?

They hit it pretty close most often

No recommendations on their sight for tire pressure. They are bias ply tires. They wrinkled quite a bit with 14 lbs in them. At 11 lbs they looked like they were starting to wad. I considered going up in pressure due to less side wall support with no tubes? Car is heavy ( 3600 lbs )and I am sure more than 50% on the nose.



I would start raising it until the 60' starts to drop
then back off a bit... you should see a better ET
and MPH