Wheel building instructions for
HyperFront - HyperLefty - HyperLefty2 - HyperBoost F
HyperRear - HyperRear2 - HyperCamber - HyperBoost R

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

Follow instruction step by step:

1) Measure your "spoke-end diameter"

2) Find your front spoke length on table A & B

3) Find your rear spoke length on table C or D

4) See specific notes about spoke and rim types

5) Follow correct lacing patterns

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

Maximum spoke tension:

HyperFront/HyperBoost F - Refer to manual

HyperLefty(2) - Refer to manual

HyperRear(2)/HyperBoost R - Refer to manual

HyperCamber(2) - 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 offer ERD figures however we warmly recommend to precisely measure the rim+nipple combination.

A truly correct spoke calculation requires exact "spoke-end diameter" and rim drilling (not ERD).

Spoke-End Diameter depends on your rim internal diameter and nipple type too.

How to measure "spoke-end diameter"

2

HyperFront - HyperLefty - HyperLefty2 - Hyper Boost F

Disc side: Tangential Crossing (see sketch below) - Straight-pull spokes - All measures in mm

Table A

Spoke-end
Diameter
Spoke Length
24H
Spoke Length
28H
Spoke Length
32H
26' - 27.5' - 29' Rims
      
515
254-255
261-262
256-257
520
257
264
259
525
259-260
266-267
261
530
262
269
264
535
264-265
271-272
266
540
267
274
269
545
269-270
276-277
271

550
272
279
274
555
274-275
281-282
276
560
277
284
279
565
278-279
286-287
281
570
281
289
283-284
575
283-284
291-292
286
580
287
294
288-289
585
289-290
296
291
590
292
298-299
293-294
595
294-295
301
296
600
297
303-304
298-299
605
299
306
301
610
302
308-309
303-304
615
303-304
311
306
620
306
313-314
308-309

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.

 

HyperFront - HyperLefty - HyperLefty2 - Hyper Boost F

Radial on Right side - Straight-pull spokes - Any drilling - All measures in mm

Table B

Spoke-end Diameter
Spoke Length
26' - 27.5' - 29' Rims
  
515
244
520
246-247
525
249
530
251-252
535
254
540
256-257
545
259

550
261-262
555
264
560
266-267
565
269
570
271-272
575
274
580
276-277
585
279
590
281-282
595
284
600
286
605
289
610
291
615
294
620
296
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.

IMPORTANT NOTE: on the Right flange Berd spokes should be always mounted without "Tangential Straightpull Inserts", that's due for bearing fitting clearance.

 

 

3
HyperRear - HyperRear2 - HyperBoost R

Drive and Disc sides: Tangential Crossing (see sketch below) - Straight-pull spokes - All measures in mm

Table C

Spoke-end
Diameter
Spoke Length
24H
Spoke Length
28H
Spoke Length
32H
26' - 27.5' - 29' Rims
      
515
254-255
261-262
256-257
520
257
264
259
525
259-260
266-267
261
530
262
269
264
535
264-265
271-272
266
540
267
274
269
545
269-270
276-277
271

550
272
279
274
555
274-275
281-282
276
560
277
284
279
565
278-279
286-287
281
570
281
289
283-284
575
283-284
291-292
286
580
287
294
288-289
585
289-290
296
291
590
292
298-299
293-294
595
294-295
301
296
600
297
303-304
298-299
605
299
306
301
610
302
308-309
303-304
615
303-304
311
306
620
306
313-314
308-309

Table C

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.

 

HyperCamber - HyperCamber2

Drive and Disc sides: Tangential Crossing (see sketch below) - Straight-pull spokes - All measures in mm

Table D

Spoke-end
Diameter
Spoke Length
32H Drive side
Spoke Length
32H Disc Side
26' - 27.5' - 29' Rims
    
515
254-255
256-257
520
257
259
525
259
261
530
262
264
535
264
266
540
267
269
545
269
271

550
272
274
555
274
276
560
277
279
565
279
281
570
281-282
283-284
575
284
286
580
286-287
288-289
585
289
291
590
291-292
293-294
595
294
296
600
296-297
298-299
605
299
301
610
301-302
303-304
615
304
306
620
306-307
308-309

Table D

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.

4

Important Notes

Rims: We consider rims with 2-4mm of offset.
In case of symmetric rims you may add 1mm to front-right and rear-left sides.

Steel Spokes: Flanges accept standard spoke heads however we recommend to use only high quality butted spokes.
Butted spokes are lighter and allow a better spoke aligningment that translates in a reduced stress of the parts and an overall stiffer lacing.

Berd spokes: Flanges are designed to properly fit Berd spokes.
All edges are well rounded thereafter "Tangential Straightpull Inserts" are not necessary.
Consequently adjust Table A lenghts as follows:
- subtract 2mm from Table values if "Without Tangential Straightpull Inserts"
- keep values on Table if "With Tangential Straightpull Inserts"

Berd Tangential Straightpull Insert



WARNING: never modify even slightly the flanges of Extralite hubs not even their surface finish.

5
Lacing: correct lacing patterns with straight-pull spokes must be tangential, exactly as shown below
(and not as the traditional 2 or 3 crossings used for elbow spokes)

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

 

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