Your tyres should be 97 load rating, not 93. 97 are termed "extra load", as they have reinforced sidewalls due to the weight they need to support. With 93's there is a chance your tyres are not robust enough to prevent damage when crashing that weight over potholes, especially if your pressures are low. I have had the same wheels as you on my S80 for the past 8 years and 130k miles and haven't suffered damage despite terrible roads on my daily commute. Hope this helps.
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