Compatibility

• Shimano Dura-Ace 7900,7950,7800
• Shimano Ultegra 6750
• Shimano 105- 5700
• Shimano Tiagra 4650 
• FSA
• Specialized S-Works.
• SRAM Force and Red but NOT compatible with SRAM cranks that have 1 hidden chainring bolt (Force22, Red22)
• Plus many more older cranks

Bolts

• For Outer chainring please order Long bolts
• 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