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What's the difference between Sapim Polyax Al nipples and those from other manufacturers that prevents the inevitable corrosion in British weather? I use the brass Polyax nipples and washers and to date find them great but on the odd occasion I've used DT Swiss Al nipples they corroded. I could have course have done something wrong, in the correct conditions I'm sure they are great.
No.
I find Sapim Polyax ali nipples the easiest of all nipples, including brass, to build with and I've never had a problem with them corroding.
So Revs no, ali nips yes. ATMO.