08-01-2013, 03:30 AM

Hello Folks

I have a set of old rims that I am going to build several wheels from. I am attempting to calculate erd (effective rim diameter) so I can then calculate the spoke lenth. The numbers that I keep coming up with are around 506.4 mm. Is it likely that these are 507mm rims considering the tires that were on there were 24 X 1.75 in size?

thanks,

jake

I have a set of old rims that I am going to build several wheels from. I am attempting to calculate erd (effective rim diameter) so I can then calculate the spoke lenth. The numbers that I keep coming up with are around 506.4 mm. Is it likely that these are 507mm rims considering the tires that were on there were 24 X 1.75 in size?

thanks,

jake