absoluteBLACK Oval 110BCD 4B 48t 2x Chainring Black

. Size (Mass +/-1g): 34T (31g), 36T (37g), 38T (41g), 50T (120g), 52T (137g), (53T - go to 9100 model) . Colour: Black . Compatibility: Shimano Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 Pioneer, SRM and other power meters . BOLTS: o For Outer chainring please order Long bolts OR Bolt Covers o Changing Inner chainring to oval only? use original bolts . Material & Finish: cnc machined 7075 Txxx Aluminium. Long-lasting construction. Type II anodizing . Ovality: Optimized to each size separately. 34T- 6.5% ; 36T- 11.4%, 38T- 11.4%, 50/52 - 10.3% ; Timing of 108 -109.5 after TDC (top dead centre) - Ideal for road climbing. Patent Pending ADVANTAGES OF ABSOLUTEBLACK 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 possibility of leg cramps . You will reduce chainring/cog shifts by at least 15%