Shimano Rear Derailleur Deore Shadow RD-M4120 10/11-speed -
Shimano Rear Derailleur Deore Shadow RD-M4120 10/11-speed -
Shimano Rear Derailleur Deore Shadow RD-M4120 10/11-speed -
Shimano Rear Derailleur Deore Shadow RD-M4120 10/11-speed -

Shimano Rear Derailleur Deore Shadow RD-M4120 10/11-speed



Regular price Rs. 2,580.00
Tax included. Shipping calculated at checkout.

Deore rear derailleur RD-M4120 by Shimano - for 2x10-speed and 2x11-speed

The Deore rear derailleur RD-M4120 has been designed by Shimano for both 2x10-speed and 2x11-speed drivetrains in MTB and City & Touring applications. The largest cassette sprocket must have 42 teeth and the difference between the chainrings must not exceed 10 teeth. Thanks to its flat " Shadow" design and simple pre-tensioning, the rear derailleur does not hit the chainstay even on rough surfaces.


Series: Deore M4100
Application: All Mountain, City & Touring, Cross Country
Gearing: 10-speed, 11-speed
Mount: standard (Direct Mount compatible)
Capacity: 41 tooth
Compatibility: Shimano MTB / Touring 10-speed, Shimano MTB 11-speed
Compatibility - Chains: HG-X 10-speed, HG-X 11-speed

Technical Information:

Derailleur Pulleys: 11 tooth
Outer Cage Material: steel
Inner Cage Material: steel
Other Materials: aluminium, steel, stainless steel, synthetic resin


- only 2x compatible
- compact Shadow profile limits damage from rocks and roots
- painted cage plates
- 3 joint bushings, fluorine-coated


Cage Length: SGS
Max. Largest Sprocket Teeth: 42 teeth
Min. Largest Sprocket Teeth: 42 teeth
Max. Smallest Sprocket Teeth: 11 teeth
Min. Smallest Sprocket Teeth: 11 teeth
Max. Chainring Difference: 10 teeth
Total Capacity: 41 teeth
Manufacturer Part Number: E-RDM4120SGS


- 1 x Shimano Deore RD-M4120 Shadow rear derailleur

IN SHORT: Raise return/exchange request within 7 days of receiving the item. In case of item looking used or wrong item sent, please raise the issue on the same day by email or maximum early next day. After 7 days we cannot help with the issue of "item looks used."

We process returns/refunds for defective/ wrong items received.

For size issues there are no returns/refunds, just exchanges. Exchanges are not promised (to avoid policy abuse) but we generally help, and issue store credit if your correct size is not available with us. Items returned must be sent to us in unused, unworn condition with original packaging, tags 100% intact.


No returns on Bike sales for size issues

PRE-ORDER Cancellation will incur 4% cancellation fee.

Cancellation without reason by the customer will also incur 4% cancellation fee.

Visit RETURNS CENTER to submit your request

Please read detailed policy below to be fully informed:

For any issues

  • Check if your item is eligible for return/exchange. All details are in this policy.
  • Email at within 7 days of receiving your item.
  • Please mention your order number in the email, and state the issue.
  • Add photographs of the issue, to best highlight the problem.

Returns and refunds are eligible if

  • The Item was received in a defective/ damaged condition
  • Wrong item delivered

A product may vary slightly in colour from the image shown on the website.

Size exchanges

  • We will exchange sizes for you if the item ordered and received differs from the size chart shown on the website for that item at the time of ordering.
  • Please consult the size chart carefully before buying a product. S, M, L, XL sizing differs brand to brand, match the cm and inches.
  • Take help from the Cyclop team in finding your size, use the chat box on the site.
  • If the item does not fit you for any other reason and you want to exchange it, we will help you at discretion. We generally issue store credit if the exchange size is not available.

Returns/ exchanges will be processed only

  • If the product is unused/unworn
  • In original packaging with tags, manuals, packaging intact (not torn or ripped)
  • If sent with proof of purchase – receipt/ invoice
  • Returned with promotional items sent with the product

Due to hygiene reasons, we will not accept returns/exchanges of jerseys, shoes that appear even slightly used. Intimate-use items like cycling shorts, socks will not be returned/exchanged.

Shipping charges for return/ exchange

  • For defective/damaged/wrong items we will ship back the item at no cost to you.
  • For size returns you are required to ship the item to us with charges borne by you.
  • Original shipping charges are non-refundable.

A customer may exchange a product once.

No returns/ refunds/ exchanges for clearance items.

All returns/exchanges must be agreed with the Cyclop team on email before any related shipping is done.



If you report an issue, 7 days after receiving the item, it will be treated as a warranty issue. You are required to contact the brand directly then, or connect with their official representatives in India for direct resolution of the problem.


In general, our team helps customers get the item they are happy with, we assist in genuine cases for return/exchange with the goal to make customer experiences great.

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