Patches are good too.My tire guy does not plug,,
he puts a patch inside.
Where it is at pretty much does not matter.
It does cost $20,, which, around here, is high.
I guess other places that is cheap,
Using a plug AND a patch too is the best.
HOWEVER, neither is a good idea in or even right where the sidewall meets the tread.
IMO, sidewalls are too thin and flex too much for either method (or even doing both) to be safe at highway speeds.
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