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Size (Mass +/-1g):
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34T (31g), 36T (37g), 38T (41g), 39T (42g), 50T (120g), 52T (137g), 53T(139g)
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Color
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Black, Grey, Champagne (inner ring in black only) Bolts are available in black only
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Compatibility
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Shimano Dura-Ace 9100, R9120, R9150 & R9170 Di2 and Ultegra 8000, R8020, R8050 & 8070 Di2, 105- R7000, R7020, R7070. They can also retrofit all 9000 and 6800 series cranks but use bolt covers for best appearance. 10 / 11 / 12spd compatible.
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BOLTS
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For Outer chainring please order "Long bolts" from us OR Bolt Covers
Changing Inner chainring to oval only? use original bolts
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Material & Finish
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cnc machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
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Ovality
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Optimized to each size separately. 34T- 6.5% ; 36T, 38T, 39T- 11.4%, 50/52/53T - 10-11.2% ; Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending
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