CyberRear SL-2 134g

Improved spoke tension balance

Oversized titanium 32T ratchet wheel is engaged by a smooth and precise O-r driven 2 pawls system Shortest gear ratio 1:1 CyberRear freewheel mechanisms are suitable for road and cyclocross use (and not MTB) with a maximum shortest ratio of 1:1. Shorter ratios may produce excessive torque and damage freewheel mechanism.

Micro-tuner: our easy and quick external bearing preload system that ensures precise bearing tuning, smooth running and no play at the rim Hi-tech rarely combines with such easy tuning and maintenance easiness

Equipped with 4 high quality Abec5 or Hybrid-Ceramic bearings Bearing dimensions are one step beefier than most and much heavier competitors

As every Extralite product CyberHubs exceed UNI/DIN Safety standards

Configure

Road-race rear hub, optimal spoke camber, classic J-bend spokes, 2.8mm holes.
QR 10x130mm standard, oversized axle Ø17mm, ABEC5 cartridge bearings (high load capacity) with external hexagonal preload tuner.
Titanium 32T ratchet wheel, OR-spring oversized and sealed freewheel body.
Black anodized hub-body with laser etched graphics.
Flanges options (for standard J-bend spokes): 20-24-28h

…More Tech Details

Drillings Cassette standard Bearings

312,17 €

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Description
Hub Dimensions
Lacing
Spoke-end Diameter
Manuals
Spare Parts

Tech info

Description

Hub Dimensions

Lacing

CyberRear SL-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

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 SL-2

Left side - Radial lacing - Elbow spokes

Spoke-end Diameter	Spoke Length
515	243
520	245
525	248
530	250
535	252
540	255
545	257
550	260
555	262
560	265
565	267
570	270
575	272
580	275
585	277
590	280
595	282
600	285
605	287
610	290

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 266mm spoke.
Example 2: your "spoke-end diameter" is 567mm use 268mm spoke.
Example 3: your "spoke-end diameter" is 569mm use 270mm spoke.

Lacing: radial on interal flange side, use only D/B spokes (central section equivalent to Ø 1.5mm).

3)CyberRear SL-2

Drive side - Elbow spokes

Spoke-end Diameter	Spoke Length 24H	Spoke Length 20H and 28H
515	259-260	267
520	262	269-270
525	264-265	272
530	267	274-275
535	269-270	277
540	272	279-280
545	274-275	282
550	277	284-285
555	279-280	287
560	282	289-290
565	284-285	292
570	287	294-295
575	289-290	297
580	292	299-300
585	294-295	302
590	297	304-305
595	299-300	307
600	302	309-310
605	304-305	312
610	307	314-315
610	309-310	317

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 elbow spokes must be as shown below.

Spoke-end Diameter

How to measure "Spoke-End-Diameter"

Spoke-end diameter depends on your rim and nipple type and length.

Below you see how to measure SED for both nipple types:
External nipple configuration
Internal nipple configuration

Take measures very precisely because a well correct nipple/spoke assembly accepts a spoke-length tolerance of +/-1mm only.
(All measures are expressed in mm)

External nipple configuration

1) Insert two J-spokes (random size) with the nipples (of your final build) into 2 opposite rim holes.

This simple trick helps to keep spokes aligned and slightly tensioned.

2) Precisely measure distance between nipples.

Be careful to take measure between the 2 nipple-ends.

3) Add 2x by the nipple height (of your final build) to the measure above.
This gives "Spoke-End-Diameter".
Note: with slotted nipples measure height inside the cut.

cutted nipple

Internal nipple configuration

You can get the necessary data following the procedure below:
1) Precisely measure outer rim diameter (A).

2) Insert a nipple of your final build into a hole (use a spoke to hold nipple in position).
3) Precisely measure distance between nipple-top and outer rim diameter (B).