Hello
I unfortunately did not measure the exact thickness, but it's black coloured (8spd?)
I guess anything which adds enough stack to the cassette width to ensure it's secured without wobbling should do the trick :)
https://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Gear-changing_Dimensions#Cog_Pitch
Great thanks , and you had no issue with the exadrive cassette biting into the 9/10 freehub providing it was torqued enough ?
@Halbert started
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Hello
I unfortunately did not measure the exact thickness, but it's black coloured (8spd?)
I guess anything which adds enough stack to the cassette width to ensure it's secured without wobbling should do the trick :)
https://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Gear-changing_Dimensions#Cog_Pitch