No worries if it's not listed. Actual measurements are even better than a listing. I've found rims
can vary. I've measured differences up to 5mm (!).
Measuring ERD is easy. I use two 250mm spokes. I thread them into opposite holes (with the nipples
engaged just right), then measure from one spoke to the other (hook to hook) with calipers.
ERD = 250+250+ measurement. That math's easy to do in my head
I check at more than three pairs of opposing holes, and I often average several measurements. I've
found some rims are ovals, but some are squares and others are triangles, etc. Of course they're all
round when the wheel's done
"David Ornee" <[email protected]
> wrote in message
> I need the ERD for Syncros Big Box MTB rims. I can't find it on Rinard's chart. I will measure it
> with my method, but it would be great to have known tested value.
> David Ornee, Western Springs, IL