CyberRear SP-T wheel-building

Here you find all the necessary instructions to realize your dream wheels with pre-calculated spoke lengths.

Follow instruction step by step:

1)Measure your "spoke-end diameter"

2)Find your rear radial spoke length (left side) on table A

3)Check your rim for compatibility and hole distance, if uneven see correction factor

4)Find your rear spoke length (drive side) on table B and eventually apply correction factor

Rim offset:
(normally 2 - 3mm) influences the spoke length for an average 0.3mm.
You may neglect it or eventually use that tiny amount just for rounding lengths to the available spoke size.

(All measures are expressed in mm)

Maximum spoke tension:- Refer to manual

Warning: spoke lacing and tensioning require skills and experience,refer to an expert professional wheel builder for these operations.

1)"spoke-end diameter"

Rim manufacturers always offer ERD figures however we warmly recommend to precisely measure the rim+nipple combination.

Basically a correct spoke calculation requires exact "spoke-end diameter" and rim drilling.

Spoke-end diameter depends on your rim internal diameter and nipple type.

How to measure "spoke-end diameter"

2)CyberRear SP-T

Left side - Radial lacing - Straight-pull spokes

3)Rim Type, correction factor

Compatible with standard and triplet specific rims.
On standard rims spoke holes must be with vertical drilling. Angled drillings are not compatible, spokes would bend and break.

Ceck your rim: if distance between spoke holes are all equal go to point 4)
if the rim has uneven hole distances a correction factor is necessary.

Central hole is for radial spoke, two adjacents are for drive spokes.
Measure distance between central hole and adjecent, see below.

4)CyberRear SP-T

Drive side - Straight-pull spokes

Eventually apply correction factor

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