I think what he is saying is that generally thicker spacers like that should be bolted to the hub and those that are like that have ntegrated lug nuts built into the spacer. Similar to this. If you are sliding the spacer on the longer studs - I'd go with the 80mm to make sure you have clearance and sufficient threads for the nuts to thread on correctly.
I've had custom spacers done from
Motorsport-tech.com for a couple of cars. I like that they can match your centerbore of the wheel so you don't have to use any centerbore rings if the wheels you are running have them.
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