Hub Motor Spoke Length & Wheel Lacing Calculator

Calculate spoke cut lengths, rim nipple tangent angles, and lateral tension balance for hub motors and bicycle wheels.

Hub Motor Spoke & Lacing Studio

3D Discrete Spoke Geometry Engine

Discrete 3D spoke geometry, paired hole chords, alternate lacing permutations, and exact tension equilibrium.

Hub Motor Flange Geometry

PCD & Spacing

Verified Hub Preset*Flange thickness (3.5mm) and hole diameter (3.0mm) on All-Axle are modeled engineering assumptions; confirm with calipers.

Hub Model Name

Hub Spoke Holes

Left PCD (mm)

Right PCD (mm)

Left Flange to Center (W_L) (mm)

Right Flange to Center (W_R) (mm)

Flange Spacing (W_L+W_R mm)

Dish Offset ((W_R-W_L)/2 mm)

Flange Thickness (mm)

Hub Shift (mm, lateral axle offset)

Hole Diameter (mm)

Spoke Hole Drilling Pattern

Pair Chord Spacing (mm between hole centers)Standard Grin All-Axle paired hole chord is exactly 21.0 mm.

Rim Geometry

ERD & Drilling

Verified Rim Preset

Rim Model Name

Effective Rim Diameter (ERD) (mm)

Bead Seat Diameter (BSD) (mm)

Rim Spoke Holes (Drilling)

Left Rim Bed Offset (mm)

Right Rim Bed Offset (mm)

Seating Correction (mm)

Auto (d/2)

Lacing Patterns & Elbows

Cross & Alt

LEFT FLANGE (Disc/Drive)Pattern & Elbow

Lacing Pattern

Elbow Orientation

RIGHT FLANGEPattern & Elbow

Lacing Pattern

Elbow Orientation

Cross-lacing / Swap Spokes (Fat Bike wide rim drilling)

Left (Disc/Drive): 1-cross

Right: 1-cross

ERD: 596 mm (Hub: 32H / Rim: 32H)

Left Spoke Specs

Qty: 16

197mm purchase

Exact Calculated197.45 mm

Lacing Pattern1-cross (Elbows In)

Rim Tangent Angle81.0°

3D Radial Deviation10.5°

Purchase Choice (mm)

Right Spoke Specs

Qty: 16

199mm purchase

Exact Calculated198.94 mm

Lacing Pattern1-cross (Elbows In)

Rim Tangent Angle81.0°

3D Radial Deviation12.6°

Purchase Choice (mm)

Lateral Tension Balance & Equilibrium

Ratio: 163%

Left: 61.9%Opposing Lateral BracingRight: 38.1%