Compatibility

• Shimano Dura-Ace R9100, R9120, R9150 & R9170 Di2 & all R9000 series
• Ultegra R8000, R8020, R8050 & 8070 Di2 & 6800
• 105 R7000, R7020, R7070, 5800, 4700

Bolts

• For outer chainring please order "Long bolts" from us OR our Bolt Covers
• Changing Inner chainring only? Use original bolts

What size should I choose?

• 34T inner chainring should be used with 50T outer ring
• 36T inner chainring can be used with 50 or 52T outer ring
• 38T inner chainring should be used with 52T outer ring
• 39T inner chainring should be used with 53T outer ring