main calculator | triplet lacing calculator

Rim Dimensions

Enter values manually, or add rims
to your bench
to select them here.

Hub Dimensions

Enter values manually, or add hubs
to your bench
to select them here.

Build Parameters

ERD Center-flange distance # Spokes
Drilling offsetA positive value will move left nipples to the left or right nipples to the right. (Negative values do the opposite.)
Flange pitch circle dia
Cross patternIndependent left & right values. Decimal cross values are handled just like Damon Rinard's spocalc.xls, but are not currently supported by the rendering engine.
Spoke hole diameter
Hub offsetA positive value will move the entire hub to the right of center.
 - ICE trike = 6mm
 - Pugsley = 17.5mm
 - Moonlander = 28mm
Rim FlipAuto will flip your rim to the strongest orientation. (only affects asymmetrical rims)
Left Right
Spoke length 140.9mm 140.9mm
Tension distribution 100% 100%
Spoke head clearance 17.65mm 17.65mm
Bracing angle 10.6° 10.6°
Wrap angle (at rim) 8.8° 8.8°
Total angle at rim 13.7° 13.7°
Effective tangential PCD 61mm 61mm
Flange exit angle 28.8° 28.8°
Theta angle 20° 20°
wheel dish rendering spoke lacing rendering (left flange) spoke lacing rendering (right flange)