I just noticed these numbers on the inside of my Reynolds AR58 carbon wheel (see picture). The left paragraph seems to provide information about the product and manufacturing date/place. Does anybody know what the numbers/codes in the right paragraph mean?
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1”UD” could stand for “unidirectional” (carbon fibers). Not sure what the other abbreviations mean but it could be the thickness of various carbon (or other fiber) layers.– MichaelJul 17, 2020 at 19:33
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1 Answer
They're build QC tolerance numbers for side to side (lateral), up and down (radial), and offset (dish).
answered Jul 18, 2020 at 3:59
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1@piptoma QC is "Quality Control" generally a stage between manufacturing/finishing and packing/distribution. Parts that don't meet QC get scrapped or sent back for rework.– Criggie ♦Jul 18, 2020 at 6:05