The heart of the Acolyte derailleur is our innovative SpringLock system. By pairing a customised linear rate high tension spring and a dual stage activation mechanism, weâÂÂve developed a system that can provide substantial chain security when you need it and can be turned off when you donâÂÂt. To engage the clutch, turn the engagement bolt clockwise until it clicks. ThereâÂÂs no way to overtighten the bolt. To disengage the clutch for wheel removal, flip the switch. ItâÂÂs that simple.