Black Diamond Hubs

$173.00

Availability

In Stock !

Black Diamond hubs are the true pinnacle of modern engineering and cnc capabilities. We use best possible materials and technique to bring what we think is one of the most reliable and finesse hubset ever created. We bring you luxury and uniqueness at reasonable price.

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Model (Mass +/-2g):	Front: QR15 (138g), Rear: 142x12 10/11spd (268g); 142x12 XD (263g). All hubs are 32 holes only.
Color	BLACK, Racing red (Limited)
Options	Front can be converted to QR5 - new axle and endcaps required. Rear can be converted to QR135- only new endcaps required.
Material	body: cnc machined 7075 Txxx Aluminum, Freehub&ratchet: hardened rust proof steel
Finish	type II anodizing
Destination	Hubs are rated from XC to aggressive Enduro. They will also work great on CX bike. No weight limit.

Hubs are designed to meet demands from competitive XC racing to aggresive Enduro riding style. No weight restriction.

BEARINGS:

Huge, heavy duty 17x30x7 (6903) ABEC 5 Enduro 2RS cartridge bearings with graphite retainer cages for durability. 4 of them in the rear and 2 up front. Bigger bearings roll smoother and can withstand much higher loads. Our bearings are on average 60g heavier per set than small bearings installed in other very light hubs. 6903 bearing has 450kg of dynamic load capacity. That is 2x more than average smaller bearing mounted in super light hubs. Fear no more of wheel durability when riding big drops.

FREEHUB BODY

We use hardened, rust proof steel for extreme longevity and cassette „dig in” prevention. It's almost as light as aluminium counterpart, but many times stronger. Individual cogs will not bite into freehub, even when loose. Freehub is rated for 7(dh), 9, 10 and 11(CX) speed cassettes, Sram and Shimano.

MAGNETIC RATCHET SYSTEM

This Worldwide patented mechanism is one of the most reliable out there. Instead of steel springs and pawls we use two powerful, circular magnets to push two ratchets together. All parts in this system are made out of hardened, rust proof steel for uncompromised durability. This ratchet system can tolerate mud, water and other contaminants unlike standard solutions based on pawls. We use 26 Points Of Engagement for a perfect balance between drag and durability (as more POE than that creates more drag and is more fragile for contamination). Design's greatest strength is its ability to cope with very high load. The reason for it is that you always have 26 points engaged, unlike 2-4 in pawl&spring system. Thanks to „no steel spring” design, this system can work at any temperature with unchanged repelling force on the ratchets! System we use meets great success from over 8 years on the racing field.

BEARING PRELOAD SYSTEM

External bearing preload nut in both hubs will keep bearings in optimal condition. Even the most precise machining will not compensate for some assembly stresses caused by lacing the hub. Hence the need for such system to ensure that bearings will work in optimal preload. This preload system requires a special BPS key which can be purchased from here.

SIMPLICITY

Ratchet system has only one moving part. Rear hub can be disassembled and cleaned by hands.

CONFIGURATION

Hubs are factory assembled in QR15, 142/12 Shimano and 142/12 XD (XX1) configuration. These are by far most common. If you require however to convert them to QR5, please choose additionally a converting kit. Front requires "axle and endcaps" kit and rear only endcaps. All hubs are 32H.

Dimensions for wheel building

All spoke holes are 2.5mm in diameter. Measurements are provided from center of the hub to center of the flange holes. Drilling circumference is provided from centers of the spoke holes. It is always a better idea to give such a great hubs to wheelbuilder to create wheels. You will use them a lot, so make sure they are properly laced and tensioned. Hubs drilling - 32H.

Front: Left & Right flange drilling Ø: 56mm Center to right flange: 28.3mm Center to left flange(disc): 22.5mm	Rear: Left & Right flange drilling Ø: 55.5mm Center to right flange: 20mm Center to left flange(disc): 34mm
Maximum spoke tension: Front: Disc side 120kgf +/- 10kgf Non disc side 100kgf +/- 10kgf	Rear: Disc side 70kgf +/- 10kgf Drive side 120kgf +/- 10kgf

Absoluteblack hubs are warranted against defects in materials and/or workmanship for a period of two years from original date of purchase to the original owner.

Designed in UK. Manufactured in Poland (EU).

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SIZE GUIDE

How to choose correct oval chainring size:

MTB

26T Oval chainring has the ovality of 24/28T and is best for someone who uses currently 26T round ring. (Fatbikes!)
28T Oval chainring has an ovality of 26/30T and is best for someone who uses currently 27 or 28T round ring.
30T Oval chainring has an ovality of 28/32T and is best for someone who uses currently 29 or 30T round ring.
32T oval ring will suit best someone who uses 31 or 32T chainring currently. While pedalling, you will feel similar effort to the one riding round 31T ring, but you will gain the speed similar to riding 34T chainring.
34T Oval chainring has an ovality of 32/36T and is best for someone who uses currently 33 or 34T round ring.
36T Oval chainring has an ovality of 34/38T and is best for someone who uses currently 35 or 36T round ring.

SUB COMPACT ROAD

46/30T is best for great gravel adventures where lots of climbing is involved and bike is packed with gear. Or simply for you to actually enjoy road climbs like Sa Calobra in Majorca or Alpe d'Huez in France.
48/32T is ideal for general road climbing and day to day riding. Planning L'Étape du Tour? This size is right for you (30T would be too slow).

ROAD

Ramps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T.

34T inner chainring should be used with 50T outer ring. It has 6.5% ovality. Use a 34T to help with spinning higher cadence and hilly terrain.
36T inner chainring can be used with 50 or 52T outer ring. It has 11.4% ovality. Use a 36T if you’re a strong rider or for rolling terrain.
38T inner chainring should be used with 52T outer ring. It has 11.4% ovality. Use a 38T if you’re a very strong rider or for flat terrain.
39T inner chainring should be used with 53T outer ring. It has 11% ovality. Use a 39T if you’re a very strong rider or for flat terrain.
50T outer chainring – Choose this size if you ride for pleasure or sportive events. This is the most versatile and comfortable size.
52T outer chainring - if you race and feel strong, it's the classic outer chainring size and a great option for experienced riders.
53T outer chainring - if you race and feel very strong, it's the classic outer chainring size and a great option for powerful riders.

Remember when selecting your chainring sizes - it's not about what others use, but about ensuring YOUR ability to maintain a comfortable and effective cadence across the terrain you ride most often. If you ride chainrings that are too large (round or oval), your cadence will be lower. This can affect your performance by prematurely tiring your legs and possibly lead to stress injury in your knee joints.

GRAVEL

44T Oval chainring is best suited for someone who uses wide gravel tires, plenty of bike mounted camping gear or simply ride in mountain terrain.
46T Oval chainring is best suited for fast hill riding with majority of gravel roads and some tarmac roads.
48T Oval chainring is best suited for someone who rides majority of tarmac roads and occasional off-road flat terrain.
50T Oval chainring is best suited for road oriented riders with occasional flat fire.

Most CX riders choose 38T as most versatile option. If you feel strong try bigger size.

36T Oval chainring has the ovality of 34/38T and is best for someone who uses currently 36T round ring (also good for MTB).
38T Oval ring will suit best someone who uses 37 or 38T chainring currently. While pedalling, you will feel similar effort to the one riding round 37T ring, but you will gain the speed similar to riding 40T chainring.
40T Oval chainring has an ovality of 38/42T and is best for someone who uses currently 39 or 40T round ring.
42T Oval chainring has an ovality of 40/44T and is best for someone who uses currently 41 or 42T round ring.

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30 day satisfaction guarantee

Get one of our premium Oval chainrings Today and use it for 30 days... If you're not delighted with your purchase and feeling the benefit in your legs, then we'll exchange your oval for a round chainring free-of-charge.

Our studies show up to 9% increase of Force effectiveness, up to 7% less oxygen consumption, up to 15% less Ventilation (breathing) and up to 10% heart rate decrease when using oval chainrings versus round. It means it's simply easier to ride with Oval.