ABSOLUTE BLACK

absoluteBLACK 4 Bolt Premium Oval Chainring

Chainring | Product Code: WO2230

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149.99

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North Shore

Britomart

Ellerslie

Pukekohe

Hamilton

Rotorua

Tauranga

Cambridge

Te Awamutu

Wellington

Christchurch

Dunedin

Logistics Centre

North Shore

Britomart

Ellerslie

Pukekohe

Hamilton

Rotorua

Tauranga

Cambridge

Te Awamutu

Wellington

Christchurch

Dunedin

Logistics Centre

North Shore

Britomart

Ellerslie

Pukekohe

Hamilton

Rotorua

Tauranga

Cambridge

Te Awamutu

Wellington

Christchurch

Dunedin

Logistics Centre

North Shore

Britomart

Ellerslie

Pukekohe

Low Stock

Hamilton

Rotorua

Tauranga

Cambridge

Te Awamutu

Wellington

Christchurch

Dunedin

Logistics Centre

North Shore

Britomart

Ellerslie

Pukekohe

Low Stock

Hamilton

Rotorua

Tauranga

Cambridge

Te Awamutu

Wellington

Christchurch

Dunedin

Logistics Centre

If you would like to view a bike shown as available in a warehouse, please call ahead or email us well in advance to ensure the bike you are wanting to view/purchase is built up.


PREMIUM OVAL ROAD 2X FOR R9100 & ULTEGRA R8000

Premium oval road chainring for R9100 & Ultegra R8000

absoluteBLACK Premium Shimano 110/4 bcd compatible oval chainrings are designed for the new type of Shimano cranks Dura-Ace 9100 & Ultegra 8000 only. These are finest oval chainrings on the market in terms of shifting, smoothness of pedalling and manufacturing quality. (They can be also retrofitted to 9000 and 6800 cranks). 10/11/12spd compatible.

Compatibility

Shimano Dura-Ace 9100, R9150 Di2 and Ultegra 8000, R8050 Di2. They can also retrofit 9000 and 6800 cranks but use bolt covers for best appearance. 10 / 11 / 12spd compatible.

IMPORTANT

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

If you wish to use other configuration it will also work, but shifting will be slower and may require more "adjustments" of front dérailleur to be acceptable. Also remember that front dérailleur can only accept max 16T difference between 2 chainrings - this is how Shimano and Sram designed them.

Advantages of Absolute Black Road Oval chainrings:

  • One of a kind special oval shape that helps you climb easier and faster (Patent Pending)
  • Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction 
  • Bespoke Absolute Black 6 point ramp and recess shifting design shifts better than any other brand and model of oval chainring
  • Finest design that provides excellent strength to weight ratio 
  • You will not "feel" the oval shape while pedalling 
  • Your pedalling action will feel smoother 
  • Helps reduce stress on knees and helping your legs remain fresher for longer
  • You will be able to maintain better cadence while climbing
  • Reduces the possibility of leg cramps
  • You will reduce chainring/cog shifts by at least 15%

What size should I choose?

  • 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 a stress injury in your knee joints.

Shifting quality and technology

Both, inner and outer oval chainrings are optimized with smooth shifting in mind. This is why the back of the Absolute Black Oval road chainring does not feature cutouts, like other oval products on the market. Instead, we design smooth angled surfaces, to help chain to slide quickly and precisely between chainrings. Absolute Black outer oval chainrings have 6 up-shifting ramps, for easy and quick gear change, even under load. Each outer chainring also features 12 down-shifting points. Instead of steel shifting pins, we use a CNC machined "ramp and recess" solution. Specially raised ramps work in conjunction with the tooth recesses to stabilize the chain when shifting. Our oval chainrings DO NOT require any modification to the front dérailleur in order to work properly (apart from small standard adjustment)

Why our oval chainrings work

Our premium Oval chainrings work because riders do not produce power evenly through a pedal stroke –the musculature of human legs makes it difficult to maintain an even power delivery to a round chainring. Believe it (or not), but around chainring doesn't transfer torque to your rear wheel as smoothly as an Oval one. Oval rings work with the natural human physiology. Oval chainrings maximize the part of the stroke where power is produced and minimize resistance where it isn't. As a direct consequence, Oval rings enhance a cyclist’s ability to spin with a smoother power delivery and feel easier on legs while climbing. You will actually feel your pedal stroke to be more "round" with an Oval chainring than with a round chainring.

Why using AbsoluteBlack oval chainrings matters

Absolute Black oval road chainrings deliver power more smoothly to your rear wheel. This means you are better able to generate and maintain, constant cadence. Because oval chainrings reduce the peak loads on knee joints, riders using them get less stress on the joints (knees) and therefore are able to keep a certain level of effort for longer. This results in higher average speed. You don’t need to take our word at Absolute Black; 11 scientific studies by leading universities around the globe show that; in comparison to round chainrings when using oval chainrings, human legs utilize more muscle groups - but each of them to a lesser degree. The overall Load from pedalling an oval chainring is spread over greater muscle mass. This has three key benefits; firstly, it gives you the feeling of fresher and more relaxed legs. Secondly; it allows you to achieve higher average speed riding uphill. Thirdly; spreading the pedalling load over more muscles reduces the risk of cramp, even when riding hard. The compound effect of switching to oval chainrings; the relaxed legs, added climbing ability and reduction of cramp means your overall enjoyment of the ride is enhanced.

Why our Oval chainrings do not have adjustable timing

At Absolute Black we have extensively studied the relevant performance data regarding the optimum percentage of ovality, shape and, critically, the timing of the oval – the positioning of the high and low points of the oval, in relation to the position of the crank arm and focus this into one single mounting position – this is the really important part of what makes Absolute Black Oval chainrings so effective. By simplifying our oval chainring design, to reflect a single high performance ‘sweet-spot’, we are able to make the process of fitting Absolute Black oval chainrings faster and easier, as well as making our rings even lighter.

SPECIFICATIONS

BCD 110
Material & Finish cnc machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
Ovality Optimized to each size separately. 34T- 6.5%, 36T- 11.4%, 38T- 11.4%, 39T- 11.4%, 50/52/53T - 10-11.2%. Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing.
Size 34T (31g), 36T (37g), 38T (41g), 39T (42g), 50T (120g), 52T (137g), 53T(139g)

SPECIFICATIONS

BCD 110
Material & Finish cnc machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
Ovality Optimized to each size separately. 34T- 6.5%, 36T- 11.4%, 38T- 11.4%, 39T- 11.4%, 50/52/53T - 10-11.2%. Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing.
Size 34T (31g), 36T (37g), 38T (41g), 39T (42g), 50T (120g), 52T (137g), 53T(139g)

FREE DELIVERY

On all orders over $99 Evo Cycles offers free delivery to any physical address in New Zealand - this INCLUDES large and bulky items and bikes!

$5 FLAT-RATE FREIGHT

On orders under $99 we charge $5 flat-rate freight. This is so we can give our customers (that's you!) the most competitive pricing available for small parts and accessories. There are no hidden shipping costs and you know exactly what you're paying for.

FREE CLICK & COLLECT

Order and pay online and collect everything from one of our stores for free - no handling charges whatsoever! Just select which store you would like to collect from at checkout. Find out more about Click&Collect here.

You purchase your bike from evocycles.co.nz

Our expert mechanic pulls your bike out of the box and builds it to 100%, excluding accessories (i.e racks and baskets). We tune the brakes and gears then test ride to ensure everything runs smoothly.

We then take off a few simple parts to fit the bike into the box. We double check to ensure all the parts are enclosed, before sealing the box and sending to you.

Your bike arrives!

You use 2-3 common tools to fit a few simple parts. If you get stuck, use our help centre and bike assembly guides or give us a call and we'll talk you through the process.

You purchase your bike from evocycles.co.nz

Our expert mechanic pulls your bike out of the box and builds it to 100%, excluding accessories (i.e racks and baskets). We tune the brakes and gears then test ride to ensure everything runs smoothly.

We then take off a few simple parts to fit the bike into the box. We double check to ensure all the parts are enclosed, before sealing the box and sending to you.

Your bike arrives!

You use 2-3 common tools to fit a few simple parts. If you get stuck, use our help centre and bike assembly guides or give us a call and we'll talk you through the process.