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.
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 [censored] here and don't want to fork out $60 for a Velocity when I can get a CXP31 for $20).
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.
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 [censored] here and don't want to fork out $60 for a Velocity when I can get a CXP31 for $20).
I believe that both the CXP21 and newer Aerohead rims have ERD of 602. You should be fine.
(Andrew Martin) said:
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.
"Andrew Martin" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
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.
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 [censored] here and don't want to fork out $60 for a Velocity when I can get a CXP31 for $20).
Paul Kopit <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:
I believe that both the CXP21 and newer Aerohead rims have ERD of 602. You should be fine.
(Andrew Martin) said:
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.
After some more searching on sheldon's page (should have started there, not google) I found references with all the ERD's. Looks like I'm in the right ballpark - thanks for your help.
