Here is some info that will assist with wheel building and calculating spoke length with e*thirteen rims and hubs.

Effective Rim Diameter (ERD):

• Your rims ERD is printed on a decal opposite of the valve hole.
• If the decal has been removed and you need to measure ERD, here is how you do that.

Critical Hub Dimensions:

• Flange diameter and center-to-flange measurements are printed on all our hub shell bodies on the decal between the flanges. Please reference you hub for these measurements.
• Spoke hole diameter: 2.6mm 

Spokes and Nipples

• Spoke Spec and Recommendations
• e*thirteen Wheel Spoke Lengths
• Nipple Size: We use 12mm nipples on all our MTB wheels. Gravel wheels use 16mm nipples
• Nipple Material: Our Base level wheels use black brass nipples and our Plus and Race level wheels use black alloy nipples with preapplied thread-locker.
• Nipple Washers: We recommend using round nipple washers on all wheel builds. The nipple washers we use are 0.3mm stainless steel and concave.
• Recommended Spoke Tension:  We recommend 110-130 kgf for spoke tension.

Spoke Lacing Patterns

• All MTB wheels use a 3x spoke pattern and lacing directions shown in the image below.