Shimano 6800 / 9000 110x4 2x Standard Oval Chainrings

Our Standard Shimano 110/4 bcd oval chainrings are designed for new type of Shimano cranks like Dura-Ace 9000, Ultegra 6800, 105- 5800 and others. These are finest shift-able oval chainrings on the market. We are able to offer these great shifting rings at a lower cost due to the reduced amount of machining on the outer part of the ring, while maintaining the integrity of the shifting quality and technology. Size (Mass +/-1g): 34T (40g), 36T (44g), 50T (156g), 52T (168g)åÊ Color Grey Compatibility Shimano Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 BOLTS For Outer chainring please order Long bolts Changing Inner chainring to oval only? use original bolts 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%, 50/52 - 10.3% ; Timing of 108 -109.5å¡ after TDC (top dead center) - Ideal for road climbing. Patent Pending   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 other oval chainrings 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 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. 50T outer chainring ‰ÛÒ 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. 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 (standard) front derailleur in order to work properly. HOW TO ADJUST FRONT DERAILLEUR WITH ABSOLUTEBLACK ROAD OVAL CHAINRINGS To proceed with the adjustment you will need 2mm and 5mm allen keys. Trouble shooting: *If your derailleur overshifts the chain when moving from small ring to the big ring, it means your "gap" is greater than 2mm when chain is on big chainring (see video). You may need to reduce the gap. Your front derailleur may also be too high compared to what is advised on the video. Last thing to check is if your cage is parallel to the big chainring face. *If your front derailleur is hesitating to shift from small to the big ring then two issues may be present. The "gap" may be too small (It has to be 2mm - see video) or your cage is not parallel to the big chainring face.   HOW TO MOUNT 110/4 OVAL CHAINRING: First, you need to remove your crank from your bike. Once removed, unscrew the 4 bolts that hold two chainrings together with a T-30 torx key. Remove both original rings. Locate the new oval inner chainring with the triangular timing indicator positioned behind crank arm. The bolt holes on the small chainring are recessed – so the nut heads will sit flush with the surface of the chainring - these recesses should face you when mounting the bolts. Absolute Black outer chainrings have a specific recess to accommodate the rear edge of the crank arm - position the outer ring to line up that recess with the crank arm. If you are only switching the inner chainring to oval - use the original bolts that came with your crank. If you are switching to a pair of oval rings, you will need a set of regular ‘double’ chainring bolts. Tighten all four bolts with force of about 5-7Nm. Mount your crank back to the bike. You may also need to adjust the front derailleur upwards by 2-3mm.     All Absolute Black products are designed in UK and manufactured in Poland (EU) to the highest standards of quality. Cranks visible on the photos are not included to the purchased chainrings. The World's finest oval (elliptical) road chainring. Non circular chainrings, Non-round chainrings. Asymmetrical chainrings.