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 CoversChanging Inner chainring to oval only? use original boltsMaterial & Finis:CNC machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizingOvality: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 PendingIMPORTANTRamps 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 technologyBoth, 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 workOur 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 mattersAbsolute 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 timingAt 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.
Key Features:Up to 5 times faster than the speed of a flat key.,Allows the user to have the key at 30 degrees to the bolt.,Available in various metric sizes..
DT Swiss DT 350 on XR 361 Asymmetric Front WheelThis front wheel combines a DT Swiss XR 361 Asymmetric rim with a DT Swiss DT 350 hub for an excellent balance of toughness, reliability and smooth-rolling performance, wherever your next ride takes you.DT Swiss XR 361 Asymmetric RimChiselled like an elite cross country racer, tough and wide, ready for trail action. That's the XR 361. Thanks to DT Swiss's exclusive PHR nipple-spoke interface which distributes the loads on a big area of the rims surface, the wall thicknesses can be kept really low to bring down the rotational mass on your bike as low as possible. Achieving a simple goal: To go elite-rider-fast.DT Swiss DT 350 Hub with Centre Lock CompatibilityThe DT Swiss DT 350 Hub offers dependable independence, reliability, versatility, and simplicity united in a hub. The sophisticated yet simple construction of the hub allows a low weight while providing outstanding rolling performance. One final highlight is its Centre Lock disc brake compatibility, which allows for powerful and consistent braking when training, racing and exploring.Features: Rim Material: Aluminium Use: Cross Country (XC), Gravel Axle Size: 15x100mm Rim Type: DT Swiss XR 361 Asymmetric Hub Type: DT Swiss DT 350 Wheel Size: 29"/700c Inner Rim Width: 22.5mm Type: Clincher Spokes Included: Yes Brake Rotor Compatibility: Centre Lock disc brake Single or Pair: Single front wheelManufacturer's Part Number: 46-18203 Black 700c Front 15x100mmBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
DT Swiss DT 350 on XR 361 Asymmetric Rear WheelThis rear wheel combines a DT Swiss XR 361 Asymmetric rim with a DT Swiss DT 350 hub for an excellent balance of toughness, reliability and smooth-rolling performance, wherever your next gravel adventure or cyclocross (CX) ride takes you.DT Swiss XR 361 Asymmetric RimChiselled like an elite cross country racer, tough and wide, ready for trail action. That's the XR 361. Thanks to DT Swiss's exclusive PHR nipple-spoke interface which distributes the loads on a big area of the rims surface, the wall thicknesses can be kept really low to bring down the rotational mass on your bike as low as possible. Achieving a simple goal: To go elite-rider-fast.DT Swiss DT 350 Hub with Centre Lock CompatibilityThe DT Swiss DT 350 Hub offers dependable independence, reliability, versatility, and simplicity united in a hub. The sophisticated yet simple construction of the hub allows a low weight while providing outstanding rolling performance. One final highlight is its Centre Lock disc brake compatibility, which allows for powerful and consistent braking when training, racing and exploring. This version comes complete with a SRAM XD freehub.Features: Rim Material: Aluminium Use: Cross Country (XC), Gravel Axle Size: 12x142mm Rim Type: DT Swiss XR 361 Asymmetric Hub Type: DT Swiss DT 350 Freehub: SRAM XD Wheel Size: 29"/700c Inner Rim Width: 22.5mm Type: Clincher Spokes Included: Yes Brake Rotor Compatibility: Centre Lock disc brake Single or Pair: Single rear wheelManufacturer's Part Numbers: 46-21341 Black 700c 12x142mm XD 46-18201 Black 700c 12x142mm XDBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
DT Swiss RR 411 Asymmetric 18mm Road RimThe RR 411 Asymmetric 18mm Road Rim from DT Swiss combines the most advanced alloy on the market for road rims and the most advanced rim profile for modern riding. An asymmetric rim generally laces with more strength to a rear hub, since a rear hub flanges are not symmetrical to begin with. The RR 411 rim is exceptionally light, superbly strong and stylish, and is ready for everything from training to racing. This rim performs excellently for all areas of road riding and is ready to roll with you to the top of the podium.Features: Material: Aluminium Internal Rim Width: 18mm Rim Height: 21mm Brake Compatibility: Rim Brake Use: Road Type: Tubeless Ready Weight: 435gBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles. Ride. Eat. Sleep. Repeat.
DT Swiss RR 411 Asymmetric 18mm Road RimThe RR 411 Asymmetric 18mm Road Rim from DT Swiss combines the most advanced alloy on the market for road rims and the most advanced rim profile for modern riding. An asymmetric rim generally laces with more strength to a rear hub, since a rear hub flanges are not symmetrical to begin with. The RR 411 rim is exceptionally light, superbly strong and stylish, and is ready for everything from training to racing. This rim performs excellently for all areas of road riding and is ready to roll with you to the top of the podium.Features: Material: Aluminium Internal Rim Width: 18mm Rim Height: 21mm Brake Compatibility: Rim Brake Use: Road Type: Tubeless Ready Weight: 435gBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles. Ride. Eat. Sleep. Repeat.
Super-Light, Exceptionally Strong and Stylish The rim is created, then coated with a DT Swiss unique surface treatment to get the most out of aluminium. The finished rim is super-light, exceptionally strong and stylish. This version features an asymmetric design to provide the best performance with asymmetric hub flanges.
DT Swiss RR 411 Asymmetric DiB 18mm Road RimThe DT Swiss RR 411 Asymmetric DiB features the most advanced aluminium construction known, combined with the most advanced rim profile. This rim is created using the best materials available, using only the highest-grade of aluminium. It is super-light, ultra-strong and adds style to any bike its added to. This version features an asymmetric profile to meet the demands of modern asymmetric hubs flanges, providing exceptional wheel-build strength.Features: Material: Aluminium Rim Height: 21mm Rim Inner Width:18mm Rim Outer Width: 21.5mm Decal Type: Vinyl Bore Type: Non-Eyelet, PHR washer Weight: 435gBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
DT Swiss RR 421 Asymmetric DB 20mm Road RimThe RR 421 Asymmetric DB 20mm Road Rim from DT Swiss is an asymmetric version of the RR 421 and generally an asymmetric rim laces with more strength to a rear hub than a symmetrical rim, since a rear hub flanges are not symmetrical to begin with. This rim is exceptionally light, superbly strong and stylish. This rim performs excellently for all areas of road riding and is ready to roll with you to the top of the podium.Features: Material: Aluminium Internal Rim Width: 20mm Rim Height: 32mm Brake Compatibility: Disc Brake Use: Road Type: Tubeless Weight: 520gBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles. Ride. Eat. Sleep. Repeat.
DT Swiss RR 421 Asymmetric DB 20mm Road RimThe RR 421 Asymmetric DB 20mm Road Rim from DT Swiss is an asymmetric version of the RR 421 and generally an asymmetric rim laces with more strength to a rear hub than a symmetrical rim, since a rear hub flanges are not symmetrical to begin with. This rim is exceptionally light, superbly strong and stylish. This rim performs excellently for all areas of road riding and is ready to roll with you to the top of the podium.Features: Material: Aluminium Internal Rim Width: 20mm Rim Height: 32mm Brake Compatibility: Disc Brake Use: Road Type: Tubeless Weight: 520gBuy DT Swiss Wheels & Tyres from Chain Reaction Cycles. Ride. Eat. Sleep. Repeat.
This rim is exceptionally light, superbly strong and stylish while having an asymmetrical construction to ensure optimal strength when used with asymmetrical hubs. This rim performs excellently for all areas of road riding and is ready to roll with you to the top of the podium.
Thanks to the precise workmanship from DT Swiss, this rim is the perfect companion for general Trail riding, capable of sessioning all day long. As this is the asymmetric version, it will lace up perfectly with your hubs should they have an asymmetric flange design.