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

In short, EVERY Shimano 4 bolt crank. 10 / 11 / 12spd compatible. Use bolt covers for best appearance.

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

IMPORTANT

Ramps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T
34t Premium Series inner chainring is not compatible with power meters which use circular spider (SRAM Quarq, Power2Max, etc) . For those power meters please choose our Silver Series 34t inner oval.

If you wish to use another configuration it will also work, but shifting will be slower and may require more "adjustments" of the front derailleur to be acceptable. Also, remember that the front derailleur can only accept a maximum 16T difference between two chainrings - this is how Shimano and Sram designed them.

Absolute Black always recommends using a new chain when fitting new chainrings.