CyberRear SP 2+ From 128g
More miles, less weight No need to open the hub for spoke replacement or wheel assembling 4-bearing design for long lasting performance
Oversized titanium ratchet wheel with a precise 32T pawl engaging system Special low friction SRS axial seals on main hub bearings, 2RS protective seals on freewheel bearings
Micro-tuner: our easy and quick external bearing preload system that ensures precise tuning, smooth running and no play at the rim Spoke holes are now bigger and well rounded, for a perfect fit with Berd spokes, without washers
Equipped with ABEC5 cartridge bearings featuring Grade 5 Chromium Steel Balls, 52100 Hi-Carbon Chromium Alloy Races, Nylon-Graphite Ball Retainers. Fully serviceable. Very light: a weight nearly as low as hybrid ceramic versions.
Hi-tech rarely combines with maintenance easiness, not here! As with all Extralite products CyberHubs exceed UNI/DIN Safety standards
Tech info
Description
Road-race straight-pull rear hub, optimal spoke camber, Ø 2.8mm spoke holes are 3D angled and rounded for perfect spoke-to-rim alignment & optimized spoke camber.
QR 10x130mm standard, oversized axle Ø17mm, High load capacity cartridge bearings with external hexagonal preload tuner.
Titanium 32T ratchet wheel, OR-spring oversized and sealed freewheel body.
Black anodized hub-body with laser etched graphics.
Weight: 128g (20h)
Hub Dimensions
Lacing
CyberRear SP 2, 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)
3) Lace the wheel respecting correct lacing pattern (see below)
4) Notes about different spoke materials (Butted-steel, Berd, Carbon-metal)
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
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Spoke-end Diameter
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Spoke Length
24H |
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Spoke Length
20H |
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Drive side
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Left side
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Drive side
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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.
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.
3) Lacing pattern
Lacing: correct lacing patterns with straight-pull spokes must be as shown below.
4) Spoke Materials
Steel Spokes: Hub f langes accept standard spoke heads however we recommend to use only high quality "butted" steel 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 too.
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 same values on Table if "With Tangential Straightpull Inserts"
Berd Tangential Straightpull Insert
Carbon-Titanium Spokes: Hub flanges accept composite spoke that feature standard thin metal ends (Titanium or Steel) since
the short metal head should be well bendable in order to get the spoke correctly aligned with the rim.
When lacing Carbon Titanium spokes make sure to add this important step to the lacing process:
- As spokes are fully tensioned settle spoke heads (before final truing).
- To settle spoke heads push the metal area of the spoke immediately after the hub flange with
a small wood/plastic rod in order to settle them permanently to the exact direction.
- Then execute the final truing.
Note that cabon-metal spokes are extremely sensitive to the following:
- Twist: thread-to-head section should never get twisted not even during lacing.
- Spoke to nipple-alignment: each nipple should get perfectly aligned with its spoke.
- Avoid exposure to hi-temperatures as behind car windows under hot sun, transport, storage etc.
- Avoid hits with any hard object during riding, transport, storage etc.
Fully respect these basic info before and after installation.
Bearing Options
Bearing Options
All Extralite hubs and wheels are offered with a choice of ready installed bearings among the best available today.
All bearings feature low-friction rubber seals on both sides.
Hyper hubs, that are specifically designed for off-road use, feature an additional external O-r seal that protects the bearing seals.
Internal bearing selection
Each bearing unit is individually selected by Extralite staff, we check seal drag, rolling smoothness then select and divide them 3 different fitting classes of internal diameter, each class is 2 microns by the next one.
Despite all our bearings come directly from very high quality manufacturers our staff individually checks each unit for rolling smoothness and bore dimensional tolerance.
Extralite staff checks rolling smoothness and seal drag resistance first, then all the units passed are selected and divided in 3 different fitting classes of internal bore, each class is 2 microns by the next one. All that allows our famous truly perfect axle to bearing fitting that together with our precise bearing preload offers very high mileage with minimal rolling resitance.
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Abec5 Steel bearings
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Famous Abi-Enduro ABEC 5 precision bearings
Standard equipment for all Extralite Road hubs |
|
 |
Plus
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Minus
|
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High mileage Good rolling resistance High impact resistance Average best choice for dry environments |
Sensible to water & moisture inside the hub
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|
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ABI 440C Stainless bearings
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Abi-Enduro precision fully stainless bearings 440C |
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 |
Plus
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Minus
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High corrosion resistance Highly resistant to water/moisture (inside hub too) Medium-high impact resistance Average best choice for humid environment |
Medium mileage Medium rolling resistance
|
|
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HYC HyperCeramic
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Extralite Ceramic bearings, extremely durable & non-rustable |
|
|
Really trick!
|
Plus
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Minus
|
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Low rolling resistance Low weight High mileage High impact resistance Highly resistant to water/moisture (inside hub too) Best choice for maximum racing performance and durability |
Installation requires very good skills |
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XD-15 Ceramic
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World trickiest Ceramic bearings ever, extremely durable & non-rustable
|
|
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Plus
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Minus
|
|
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Low rolling resistance Highest mileage Fully openable and rebuildable Highly resistant to water, moisture and salt Best choice for maximum racing performance and durability |
Expensive Installation requires very good skills |
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Read well these basic info before ordering the parts.
Bearing replacement is not an easy operation as it may seem.
Additionally the installation of any kind of Ceramic bearings requires a very good specific expertise.
Extralite offers complete tool-sets for hub maintenance: the Pro-tool kit 1 and Bearing-sitter includes bearing inserting tools in every bearing sizes used on UltraHubs / HyperHubs / CyberHubs.
If your hub was originally equipped with standard bearings it will probably require micro-tolerance adjustments to axle and bearing fittings, this
to allow proper bearing rotation and durability (these operations are for real experts only). Alternatively send your hub to us for this servicing.
Read well Bearing Tips before attempting a bearing replacement.
This option has been offered till 2024
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HDC Heavy-Duty Ceramic
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Hi-quality Heavy-Duty Hybrid Ceramic bearing |
|
 |
Plus
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Minus
|
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Good mileage Low rolling resistance Medium-high impact resistance Medium resistance in humid environment Good choice for best racing performance |
Complex installation Sensible to water & moisture inside the hub |
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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.
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).
This is the correct caliper positioning inside the rim (don't cut your rim!)
4) A-2B = "Spoke-End-Diameter".
Manuals
Spare Parts
Spare Parts
103,48 €
41,74 €
10,43 €
10,43 €
2,61 €
16,52 €
86,09 €
51,30 €
10,43 €
10,43 €
10,43 €
7,83 €
1,74 €