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| Unit | NOS |
| Country of Origin | POLAND |
| 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 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 |