MICRO SHIFT Acolyte Medium Cage SpringLock Rear Derailleur



Totally new Acolyte / Acolyte Group offers a top-class shifting system with a wide range and simplicity. Reliable chain retention, intuitive shifting action, and enough gear range to climb the walls will surely support your challengE

At the heart of the Acolyte derailleur is an innovative spring lock system. By combining a customized linear-rate high-tension spring with a two-stage activation mechanism, we have developed a system that allows you to secure the chain when you need it and disengage it when you don't. To engage the clutch, turn the engage bolt clockwise until it "clicks" into placE Do not over-tighten the bolt. To remove the wheel, disengage the clutch with the switch. That is all.


  • Innovative SpringLock chain retention prevents chain slap and chain drop problems even on rough terrain
  • Direct path cable routing for smooth and responsive shifting
  • Compatible with 12-42T and 12-46T 8-speed cassettes

  • Compatible with Acolyte shifters only






Cage Length

Medium Cage

Max Cog






Cage Material




Support Link

  1. We ship within 1-2 business days after receiving your order (payment). (Basically, orders placed before 12:00 p.m. are shipped the same day.)
  2. Messenger delivery is available within Nagoya City only.
  3. We ship every day from Monday to Sunday, except on temporary holidays.
  4. Available delivery areas: All over Japan and the world.
  5. Please note that delivery may be delayed due to credit card processing status. If you would like to specify the delivery date and time, please fill in your request in the additional information in the shopping cart.
  6. The product will be shipped from Circles.
  7. Please contact the shipping company in case of damage or loss during shipping.

Regarding the delivery of complete bikes

  • Please note that a separate shipping fee of 9,900 yen (tax included) will be charged for shipping complete bikes. (However, an additional fee will be charged for delivery to Okinawa and remote islands.)
  • After receiving your order, we will do a final check and ship complete bikes, but it may take 1-2 weeks. Please understand.
  • We will send the bike with some parts removed for packing. We strongly recommend that you have your bicycle assembled at your nearest bicycle store.
  • We will inform you of the delivery date and other details by e-mail.
  • We apologize for any sales discrepancies at the store.

Regarding the delivery of frame sets

  • Nationwide flat-rate shipping: 5,500 yen (tax included) (However, an additional fee will be charged for delivery to Okinawa and remote islands.)
  • We will inform you of the delivery date and other details by e-mail.
  • We will provide the pre-treatment of facing and tapping for the frame sets purchased at our store as a service. We will inform you separately after purchase.
  • We can also install a headset and BB for a fee, so please feel free to contact us.

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