He drop me
Join Date: Jul 2004
Location: Central PA
Bikes: '03 Marin Mill Valley, '06 Cannondale Rush, '02 Eddy Merckx Corsa 0.1, '07 Bottecchia Euro Sprint Tour Comp Elite Pro 1000
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Wheel build question re hub measuring and spoke length...
Ok so I got mu hubs from the Miche group buy and I am getting ready to build my wheels. Hub specs I have seen online seem to match the numbers I get when I put the calipers on the hubs...but lets check them.
The one I really have a question about is the Flange dia...all of the sources I have seen say this hub is 60mm. When I measure the hub the OD of the flange is 69.5mm but the hole circle is 60mm. I assume spoke calcs want the spoke hole dia...correct?
All the other numbers are pretty simple. Front hub center to flange is 33mm on both sides. Rear hub non-drive side center to flange 45mm, drive side 30mm. Spoke holes are 2.5mm. mine are 32 spoke hubs.
So given the above and the use of IRD Aero (Niobium30) rims which have an ERD of 577mm the numbers I get are this for a 3 cross build front and rear:
Front spokes - 279.2mm (so 279mm) Rear non-drive side - 280.9mm (281mm) and drive side - 278.9mm (279mm)
So am I correct that I should have my LBS cut the front spokes to 279mm, and the rears to 281 and 279? These numbers came from Spocalc.
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