Our Silver Series line of Shimano 110/4 BCD oval chainrings is designed for new type of Shimano cranks like Dura-Ace 9000, Ultegra 6800, 105- 5800 and others. This is a simplified version of our Premium line. Same aluminium, teeth and shifting ramps, but less material machined out on the outer side for easy maintenance and cleaning. Size (Mass +/-1g): 34T (40g), 36T (44g), 50T (156g), 52T (168g) Color GREY only Compatibility Shimano Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 & Pioneer, SRM and other power meters 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 -109.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending
