Wheel building instructions for
HyperBoost3 F / Smart3 F - HyperBoost3 R / Smart3 R - HyperLefty3

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 spoke length on table

3) See specific notes about spoke and rim types

4) 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:

HyperBoost3 F - Refer to manual

HyperBoost3 R - Refer to manual

HyperSmart3 F - Refer to manual

HyperSmart3 R - Refer to manual

HyperLefty3 - Refer to manual

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.

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 too.

How to measure "spoke-end diameter"

2
Spoke lenght
HyperBoost/Smart3 F - Hyper/SmartBoost3 R - HyperLefty3

All sides - straight-pull spokes - all measures are in mm

Spoke-end
Diameter
Spoke Length
24H
Spoke Length
28H
26/27.5/29' Rims
    
515
252-253
258-259
520
255
261
525
257-268
263-264
530
260
266
535
262-263
268-269
540
265
271
545
267-268
273-274

550
270
276
555
272-273
278-279
560
275
281
565
276-277
283-284
570
279
286
575
281-282
288-289
580
285
291
585
287-288
293
590
290
295-296
595
292-293
298
600
295
300-301
605
297
303
610
300
305-306
615
301-302
308
620
304
310-311

Table A

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

3

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 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 their surface finish.



4
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)

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

 

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