Will mount to most any 4-arm 104/64 MTB crank
30T is a threaded ring and needs M8 male bolt with min 7.5mm length for interface.

REAR DERAILLEUR- Must be used 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

Stamped and machined manufacturing
Unique Wide/Narrow tooth profile for chain retention