absoluteBLACK Premium Shimano 110/5 BCD oval chainrings are designed for pre-2014 cranks like Shimano Dura-Ace FC7950, Ultegra FC6750, Shimano 105 -5750 and many more with 5 bolt fitting. Super fast shifting and amazing smoothness of pedaling. It is the most Premium oval chainring on the market with scientifically proven performance gains. Size (Mass +/-1g): 34T (30g), 36T (36g), 38T (41g), 50T (122g), 52T (135g) Color Black, Red, Grey (inner ring black only) Bolts are available in black only Compatibility Shimano Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750, Tiagra 4650, FSA, Rotor 3D & 3D+, S-works and many more older cranks. Also fits Sram Force and Red but NOT compatible with Sram cranks that have 1 hidden chainring bolt (Force22, Red22). Compatible with Di2 IMPORTANT If you currently use 53/39T chainrings you have 130BCD cranks (not 110bcd). In this case please look at our 130BCD chainrings as you will not be able to use anything smaller than 53/39T. 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%, 38T- 11.4%, 50/52 - 10.3% ; Timing of 108 -109.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending
