CyberRear SPD(2) 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)

Maximum spoke tension: Refer to manual

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.
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 SPD(2)

Left side - Radial lacing - Straight-pull spokes

Spoke-end Diameter
Spoke Length
515
244
520
247
525
249
530
252
535
254
540
257
545
259

550
262
555
264
560
267
565
269
570
272
575
274
580
277
585
279
590
282
595
284
600
286
605
289
610
291

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 268mm spoke.
Example 2: your "spoke-end diameter" is 567mm use 270mm spoke.
Example 3: your "spoke-end diameter" is 569mm use 271mm spoke.

 

3)CyberRear SPD(2)

Drive side - Straight-pull spokes

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

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

615

303

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.

 

 

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