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Every possibility (DT / Sapim) is presenting the concept the nipple head’s underside, the contact floor, is tapered, the purpose being that the nipple will self align to a sure extent because the nipple is tightened.
This “know-how” works with aluminum alloy rims with a considerably “regular” wall thickness. Highway alloy rims that come to a pointed apex, or carbon rims, with tight gap drillings, are inclined to defeat the funtion of Sapim Polyax or DT Professional Head nipples. In such examples, the nipple is held firmly by the rim itself, and might’t self align.
Loads of respectable street and MTB rims have eyelets, which negate the promoting level for these nipples. The upper finish MTB and Highway non-eyeletted rims,…typically are constructed with some kind or inside nipple washer, which performs the identical funtion.
Thus, the true magnificence/promoting level for these two nipple choices/know-how, are for alloy solely, non-eyeletted rims, that you do not plan on utilizing an inside nipple washer with.
After all it would not damage for those who use these. We use Sapim Polyax largely, (they had been first to market), they’re nice.
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