Bike Forums - View Single Post - Wheelbuilders: I have questions about 650b HED Belgium Plus rims
Old 03-03-18, 01:25 PM
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Metaluna
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Originally Posted by CliffordK View Post
Double check your ERD in a couple of places, then go with what you measured. Specs can be wrong.

Are you including the nipple and any washers in your calculations?

Nipple holes probably are angled as you think.
I'm using Damon Rinard's Spocalc spreadsheet, so I'm not sure if he includes allowance for the nipple heads or nipple length. I've used it many times in the past though and it's usually dead on for 12mm nipples without nipple washers, especially if I measure the rim with the Wheelsmith rods, which I think measure the true diameter that FBinNY was talking about. Also I checked the numbers against Freespoke and they agreed to .1mm when I used the same rim and hub measurements.

I also ran the numbers for 553.5, 554, and 555mm erd and compared the spoke lengths, so I think I found a set of lengths that should work well for the two smaller measurements, and might still be usable for 555, or at least I'd still be able to use at least half the spokes by moving them around to other places.

Last edited by Metaluna; 03-03-18 at 01:49 PM.
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