6 Europa WayFforestfach Swansea SA5 4AJ

Absolute Black believe everything can be made better, including chainrings. As a result, they made it their mission to improve riders pedalling efficiency by changing how torque from the crank is delivered to the rear wheel.

absoluteBLACK Oval 110BCD 4 Bolt 2X Asymmetric Shimano 9100/8000 - 39T

£49.99
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Description

Season : 2018

Code : ROV9100/39/4BK

Weight : 0.5KG

absoluteBLACK Premium Shimano 110/4 bcd compatible oval chainrings are designed for 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 pedaling and manufacturing quality. (They can be also retrofitted to 9000 and 6800 cranks).
 
Size (Mass +/-1g):
34T (31g), 36T (37g), 38T (41g), 39T (42g), 50T (120g), 52T (137g), 53T(139g) 
 
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.
 
Bolts:
For Outer chainring please order "Long bolts" from us OR Bolt Covers
 
Changing Inner chainring to oval only? use original bolts
 
Material & Finis:
CNC machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
 
Ovality:
Optimized to each size separately. 34T- 6.5% ; 36T, 38T, 39T- 11.4%, 50/52/53T - 10-11.2% ; Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending
 
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 pedaling
  • Your pedaling 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 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 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. Special 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 a round 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 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 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.
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    2. Telephone:- Our dedicated team are available Monday to Friday 8:30am - 6:30pm and Saturday 9:00am -1:00pm to take your order on 0330 100 2480 (free from most mobiles).

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    Standard delivery is completely free to most mainland UK addresses for orders of a value of £15 or more. Standard delivery is normally 2-5 working days.

    Please refer to the table below for detailed pricing information for the regions that we cover.

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    Thanks to the Distance Selling Regulations you can buy in confidence knowing that you have the same if not better guarantees than if you were to purchase from a retail store. For example, you have the right to cancel your order within 14 days, starting from the day after you receive the goods. All products are sourced from official UK importers and covered by manufacturers warranty. If you do need to send items back to us please make sure that you retain proof of postage in the event that it is needed.

    Please note item/s must be returned in the original packaging, unused, unopened and in a resaleable condition within 14-days of notification to cancel.

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    We pride ourselves on customer satisfaction and will try to rectify any problems you may have. You can email us at info@cyclesolutions.co.uk or write to us at Cycle Solutions, 6 Europa Way, Fforestfach, Swansea, SA5 4AJ. We will acknowledge receipt and set about resolving the situation immediately.

    View our full delivery information

    Returns

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    Cycle Solutions offer a full 18-month warranty on bikes purchased through our online shop.

    In the unfortunate event of your purchase being affected by a warranty-covered fault, please inform us by email (aftersales@cyclesolutions.co.uk) or telephone (0330 100 2480)

    Once a warranty claim has been placed we will review the claim and advise on an appropriate course of action, please do not return your item until you have spoken to an advisor.

    Please allow a minimum of 15 working days from receipt of returned item(s) for repair/replacement under warranty. We expect to be able to return the items wthin a maxmum 30 working days, however, specific timescales can change based on the requirements of the individual case.

    Most bikes and accessories are covered by a standard manufacturers warranty but please be aware that there are faults/issues that are NOT covered by your warranty. This includes;

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    Please contact us in advance if you wish to return a bike as Collect+ will not accept large items

    If a bike needs to be returned due to an incorrect size being ordered, the item being no longer wanted or ordered in error, then collection can be arranged at a cost of £35.00. If you do not wish to use our collection service then any alternative return method will need to be arranged at your own cost.

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    Contact Cycle Solutions on 0330 100 2480 to process your return.

    Item/s must be returned in the original packaging, unused and unopened within 14-days of notification to cancel.

    If Collect+ is not being used, then proof of postage will be required as Cycle Solutions is unable to accept liability for loss or damage whilst in transit back to us.


    Additional non-returnable items:

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    ·         Any Food or drink products that, upon return, will be within 3 months of the sell-by date

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    Your refund will be done with 30 days of receipt of returned goods and will not be done until the goods are received and inspected.

    Please do not send your purchase back to the manufacturer.
     

    Returning a product under the WEEE Regulations.

    What do the WEEE regulations mean?

    WEEE (The Waste Electrical and electronic Equipment) Directive is UK law that governs the disposal and recycling of all electrical items. The law, introduced in 2014, puts the emphasis on the producers and suppliers of electrical equipment to pay for the collection, treatment and recovery of waste electricals.   

    As a retailer that sells new Electrical and Electronic products we will take back old items, provided it is a like-for-like replacement when you buy a new product from us. We will then responsibly dispose of the old product ensuring that it doesn’t end up in landfill.

    Old products must be returned directly to our shop or head office (details below) within 28 days of your new purchase, clearly marked as WEEE.

    Cycle Solutions Head Office
    6 Europa way
    Fforestfach
    Swansea
    SA5 4AJ

    Disposing of equipment yourself

    If you choose not to send your equipment back to us for disposal then you can dispose of any electricals or electronics yourself at your local recycling centre, who will dispose of your equipment via a controlled recycling process.

    You can locate your closest collection site by entering your postcode at www.recycle-more.co.uk

    What products fall under WEEE Regulations?

    As part of the WEEE regulations, all electrical and electronic goods produced after August 2005 that fall under WEEE regulations should be clearly marked with a crossed-out bin symbol which means they should not be included with household waste so that they can be recycled

    As a responsible retailer we take all steps possible to ensure that our business meets all requirements of any EU & UK consumer protection laws, particularly the Consumer Contracts (Information, Cancellation & Additional Charges) Regulations 2013 and other legislation specific to the products that we sell.

    If you have any concerns or questions regarding this process, please contact us at aftersales@cyclesolutions.co.uk.

    View our full Returns Policy

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