 You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
So, based on the measurements form hope here:
and the 518 ERD from here
I think this is correct, and I 64 250mm spokes should do the trick?
[img] 
[/img]
Yes, you've put the right numbers in the right places, and if you were looking at just even spoke lengths then 250s will be fine. But I'd definitely be waiting until I got my hands on the rim and then measure the ERD myself. I'd probably be happier measuring the hub too to be honest.
Agreed. Didn't actually measure my rims, but all my spokes were too short when I used the manufacturers claimed dimensions, which suggest either American Classic or Light Bicycle aren't measuring things right!
Ta both. Suspect I'd be less accurate than the manufacturer at measuring the ERD and hubs, to be honest.
Have you seen this thread (and this post)?
[url= http://singletrackmag.com/forum/topic/light-bicycle-carbon-rims#post-5827578 ]http://singletrackmag.com/forum/topic/light-bicycle-carbon-rims#post-5827578[/url]
It's really not that hard to measure them - details here:
The problem usually is that manufacturer figures might be based on a prototype or pre-production version. Then things change without the published numbers being updated.