UltraFront SX wheel-building
Here you find all the necessay 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 front spoke length on table A
(All measures are expressed in mm)
Maximum spoke tension: 70kgf +/- 10kgf
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)UltraFront SX
Radial lacing - Elbow spokes
|
Spoke-end
Diameter |
Spoke
Lenght |
515 |
244 |
520 |
246 |
525 |
249 |
530 |
251 |
535 |
254 |
540 |
256 |
545 |
259 |
|
550 |
261 |
|
555 |
264 |
|
560 |
266 |
|
565 |
269 |
|
570 |
271 |
|
575 |
274 |
|
580 |
276 |
|
585 |
279 |
|
590 |
281 |
|
595 |
284 |
|
600 |
286 |
|
605 |
288 |
|
610 |
291 |
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 lenght 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.
Lacing: radial on internal flange side, use only D/B spokes (central section equivalent to Ø 1.5mm).
|
Hub
dimensions
|
|
| Avaiable drillings |
16
- 18 - 20 - 24
|
|
Center to flange |
int.
37mm
|
| Spoke drilling diameter |
28mm
|
|
Spoke hole diameter |
2,5mm
|
100% made in Italy