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So am going to rebuild a carbon easton haven rim with a DT Swiss 240 hub, but as the rim uses a spoke nipple that threads into the rim as opposed to a conventional nipple does anybody know how I'd go about calculating the correct spoke length. The DT Swiss calculator is for traditional spoke nipples and am unsure whether that method would still hold true?
Any pointers welcomed as ordering the wrong length spokes will be a costly error.
does the spoke penetrate the nipple to the same depth as a normal nipple?
if so, I'd assume measuring internal rim diameter then adding 2x rim thickness to give you a working erd to use in the dt swiss calculator.
assume you have to use a straight pull hub though.
D-light spokes also give a little depth leeway on the nips
(have never used dbl threaded nips though)
It's an interesting one as when the nipple is fully screwed into the rim only 5mm of it is left showing. The first 5mm of the nipple is unthreaded and then the rest is threaded so if you wind a spoke as far in as it will go it will be 10mm in from the rim edge. This is obviously different from a standard nipple as the spoke only goes into the rim a couple of mm as it should never go past the hidden face of the nipple.
Use a pair of J bend spokes with the haven nipples screwed onto the nipples and into the rim and measure the ERD.
I would ensure the spoke and nipple are in your desired finished thread engagement when measuring the ERD.
Use a pair of J bend spokes with the haven nipples screwed onto the nipples and into the rim and measure the ERD.
Of course. I hadn't considered doing it that way. Thanks
I did this a while ago. I used Bitex hubs from Just Riding Along. My Easton Haven wheels were 24 hole. As far as I'm aware the DT Swiss 240 24h hubs are road hubs and do not come in Boost spacing, otherwise I would have used them. I seem to remember I didn't get the spoke length right first time, but they are only £1 each so a new set plus spare was only £30.