CyberRear SP-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 on table A

(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-2

Straight-pull spokes

Spoke-end Diameter
Spoke Length
24H
Spoke Length
20H
 
Drive side
Left side
  
Drive side
Left side
515
253
256
  
259
261
520
255
258
  
262
263
525
258
261
  
264
266
530
260
263
  
267
268
535
263
266
  
269
271
540
265
268
  
272
273
545
268
271
  
274
276

550
270
273
  
277
278
555
273
276
  
279
281
560
275
278
  
282
283
565
278
281
  
284
286
570
280
283
  
287
288
575
283
286
  
289
290
580
285
288
  
292
293
585
288
291
  
294
295
590
290
293
  
297
298
595
293
296
  
299
300
600
295
298
  
302
303
605
298
301
  
304
305
610
300
303
  
307
308

615
303
306
  

309

310

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.

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

 

100% made in Italy