• Will mount to most any 4-arm 104BCD MTB crank
• 30T is a threaded ring and needs M8 male bolt with min 7.5mm length for interface.
• RD- Must use with Mid or Long cage 'CLUTCH' type rear derailleur. Example Shimano Shadow or SRAM Type 2
• In very rough terrain, or just for pure security, we still recommend use of an upper guide
