Hi,
I am lacing a motor around a 18" motorcycle rim, and because the rim is dimpled (see pic) I'm unsure of what the ERD would be. From my research, ERD is the distance from where one nipple sits to the opposite nipple on the other side of the rim. Here is what I did:
1. I fed a string (non elastic) through opposite spoke holes in the rim (one end to other), and marked the distance between the holes (not including the rim thickness)
2. I then pulled a nipple through the spoke hole, marked where the nipple came through the rim, and measured that as the rim thickness.
3. I added the distance between opposite spoke holes with twice the rim thickness for my ERD.
I'm not sure if this is the correct way to measure the ERD for a DIMPLED rim. Can anyone confirm that what I measured is in fact the ERD?
Thanks for your help!
I am lacing a motor around a 18" motorcycle rim, and because the rim is dimpled (see pic) I'm unsure of what the ERD would be. From my research, ERD is the distance from where one nipple sits to the opposite nipple on the other side of the rim. Here is what I did:
1. I fed a string (non elastic) through opposite spoke holes in the rim (one end to other), and marked the distance between the holes (not including the rim thickness)
2. I then pulled a nipple through the spoke hole, marked where the nipple came through the rim, and measured that as the rim thickness.
3. I added the distance between opposite spoke holes with twice the rim thickness for my ERD.
I'm not sure if this is the correct way to measure the ERD for a DIMPLED rim. Can anyone confirm that what I measured is in fact the ERD?
Thanks for your help!