A
Andrew Martin
Guest
Hey all - just wanted to see if any of you had access to the Wheelsmith builders guide that might
have the ERD for the CXP21 rim. I'm trying to replace a velocity Aerohead that's a 601mm. They look
rather close in design.
From http://www.branfordbike.com/wheels/wheel1.html:
For spoke calculation purposes, the effective rim diameter (ERD) is 601 mm.
The CXP33 is 596mm, so I'm hoping it's close (by my math (596 + ((33x2) - (31x2) ) = 600?). I
assume that a diameter difference of 1 mil is good enough? I've always been told that +/- 1mm
isn't an issue.
Any input is appreciated.
Thanks - a (note - being a cheap ******* here and don't want to fork out $60 for a Velocity when I
can get a CXP31 for $20).
have the ERD for the CXP21 rim. I'm trying to replace a velocity Aerohead that's a 601mm. They look
rather close in design.
From http://www.branfordbike.com/wheels/wheel1.html:
For spoke calculation purposes, the effective rim diameter (ERD) is 601 mm.
The CXP33 is 596mm, so I'm hoping it's close (by my math (596 + ((33x2) - (31x2) ) = 600?). I
assume that a diameter difference of 1 mil is good enough? I've always been told that +/- 1mm
isn't an issue.
Any input is appreciated.
Thanks - a (note - being a cheap ******* here and don't want to fork out $60 for a Velocity when I
can get a CXP31 for $20).