ABSOLUTE BLACK Oval 2x Asymmetric Shimano 9100/8000 110 BCD chainring

These Premium Shimano 110/4 bcd compatible oval chainrings are designed for Shimano cranks like Dura-Ace 9000, Ultegra 6800, 105- 5800 and others. These are finest oval chainrings on the market in terms of shifting, smoothness of pedaling and manufacturing quality. Not compatible with FSA cranks. Specifications: - Size (Mass +/-1g): 34T (31g) - BOLTS:For Outer chainring please order Long bolts OR Bolt Covers 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%, 38T- 11.4%, 50/52 - 10.3% ; Timing of 108 -109.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending