Plain and simple THERE IS NO INDESTRUCTIBLE RIM.
There are a number of things one may do to improve wheel life, but keeping rims from denting isn't one of them.
If the tire compresses to where the rim comes into direct contact with a corner like a curb or edge of a pothole it'll dent.
However that points to the solution which lies in using a tire large enough and at sufficient pressure to prevent that direct contact in the first place.
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FB
Chain-L site
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Last edited by FBinNY; 12-08-17 at 11:45 PM.