• Sorry if this has been addressed already. I wanted to know your (collective) thoughts on carbon rims without access holes. I usually call them sealed rims. Really great for tubeless as you don't need tape but an absolute pain to build. I built 2 sets last year using a magnet to pull nipples through the holes and of course losing quite a few nipples along the way and having to shake them out.

    Anyone else have any experience of building them up? Thoughts?

  • using a magnet to pull nipples through the holes

    How do they work?

    Seriously, since nipples are usually brass or aluminium, is there some ferromagnetic insert you have to insert into each one to get the magnet to pull it? I've always imagined some combination of fishing line and a crochet hook being the way to direct nipples to the right place in such rims

  • You can either get the Campagnolo magnetic nipple insert or make your own insert from old spoke. Then you drag it through with a large magnet.

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