The Absolute Black Premium 2X Oval Chainring is one of the finest oval chain-rings on the market, providing you with smooth shifting and smoothness of pedaling and manufacturing quality. These in are specifically designed for Shimano, 9100/8000 cranks, but can be retrofitted to fit 9000 and 6800 cranks. They’re also made from CNC machined 7075 Txxx Aluminum, making them light weight, strong and durable.
Color: Black, Grey, Champagne (inner ring in black only)
Compatibility: Shimano Dura-Ace 9100, R9120, R9150 & R9170 Di2 and Ultegra 8000, R8020, R8050 & 8070 Di2. They can also retrofit all 9000 and 6800 series cranks but use bolt covers for best appearance. 10 / 11 / 12spd compatible.
BOLTS: For Outer chainring please order "Long bolts" from us OR Bolt Covers
Material & Finish: 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
I was convinced to try an oval on my mtb and after the month of testing I didn't give it back, I bought it. A month later I started looking at these rings for my road bike. The came in nice packaging that wasn't overly excessive. They came with clear instructions on set up and I had them on my bike inside of 30 minutes. the rings mounted perfectly with my Ultegra cranks.
They definitely help when climbing hills. I can climb for longer and with less fatigue. An added bonus is they actually shift better than the stock chainrings on my Ultegra 8000 crankset. They're stiff, light and now I've been on them for two months without a single issue so I would definitely consider them reliable. If you're at all curious about the science behind oval rings these are the best you can buy.
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