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

Spoke-end Diameter
Spoke Length
515
245
520
248
525
250
530
253
535
255
540
258
545
260

550

263
555
265
560
268
565
270
570
273
575
275
580
278
585
280
590
283
595
285
600
287
605
290
610
292

615

294

Table A

Note: We list "spoke-end diameters" every 5mm step. If your "spoke-end diameter" measure is in between 2 steps adjust your spoke length consequently.
Example 1: your "spoke-end diameter" is 563mm use 269mm spoke.
Example 2: your "spoke-end diameter" is 567mm use 271mm spoke.
Example 3: your "spoke-end diameter" is 569mm use 272mm spoke.


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

Spoke-end Diameter
Spoke Length
24
H
515
256
520
259
525
261
530
264
535
266
540
269
545
271

550

274
555
276
560
279
565
281
570
284
575
286
580
289
585
291
590
294
595
296
600
299
605
301
610
304

615

306

Table B

Note: We list "spoke-end diameters" every 5mm step. If your "spoke-end diameter" measure is in between 2 steps adjust your spoke length consequently.

 

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