CyberRear SP 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 spoke length (left side) on table A

3)Find your rear spoke length and lacing pattern (drive side) on table B

(All measures are expressed in mm)

4)Lace the wheel respecting correct lacing pattern (see below)

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.

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

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)CyberRear SP

Drive side - Straight-pull spokes

Spoke-end Diameter
Spoke Length
20H
Spoke Length
24H
Spoke Length
28H
515
261
253
261
520
263
256
263
525
266
258
266
530
268
261
268
535
271
263
271
540
273
266
273
545
276
268
276

550
278
271
278
555
281
273
281
560
283
276
283
565
286
278
286
570
288
281
288
575
291
283
291
580
293
286
293
585
296
288
296
590
298
291
298
595
301
293
301
600
303
296
303
605
306
298
306
610
308
301
308

615

311

303

311

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.

Lacing: correct lacing patterns with straight-pull spokes must be as shown below.

 

100% made in Italy