Ritchey rim ERD for spoke length calc



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Todd Holland

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What is the correct ERD for Ritchey WCS Aero (front) and OCR (rear) 700c rims? The excellent
"spocalc.xls" by Damon Rinard lists 606mm, but a note says "spoke seat 602mm." I used the straight
number for Ritchey 26" rims and the spokes were a tad long, so I suspect 602mm is correct.

Also, do I need to account for the 3mm offset of the spoke holes on the OCR rear rim by changing the
flange-to-center distances for the hub? Or is this offset too small to affect spoke length?

Any help would be appreciated (Campy 9v hubs, 28h 3x), Todd H.
 
tholland-<< so I suspect 602mm is correct.

Agree but I'm at home and my ERD list is at work-you can call..

<< Also, do I need to account for the 3mm offset of the spoke holes on the OCR rear rim by changing
the flange-to-center distances for the hub?

Use the same flange measurements, i just add 1mm to the left spoke length instead of
2mm...build normally.

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(303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
 
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