To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
Xt shadow plus 12-speed double rear derailleur for the ultimate in shifting performance and durability.
Xt shadow plus 12-speed double rear derailleur for the ultimate in shifting performance and durability.
Shimano

Shimano Deore RD-M8120 XT 12-Speed Shadow+ SGS Double Rear Derailleur

£109.99
Earn
in Customer Rewards when you buy this item today
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

60 Day Easy Returns

We offer a 60 Days returns on the majority of items purchased on our website and in store. Simply return the item unused and undamaged with its original packaging and we will process a refund to you within 7 days to the original payment method.



After 60 days the suppliers original warranty will apply, and we will endeavour to repair, replace or refund the item depending on how the supplier sees fit to remedy any acknowledge issue with a product.

RETURNING ITEMS WITH BATTERIES - Please use Royal Mail and notify them of the contents when arranging shipping so a battery label can be attached - Please connect batteries before packing, for example batteries should be connected to heated gloves, as this is the only way you can ship items with Lithium Batteries. This is VERY IMPORTANT as items can be destroyed and this is your responsibility when using Royal Mail!

Items Excluded from 60 Days returns:

Base Layers – Layers next to skin cannot be refunded or exchanged if worn, for hygiene reasons

Gift Purchasing
We extend our 60 day returns window from November 1st, giving you or the receiver of a gift until 31st Jan to contact us to arrange a return or replacement. A proof of purchase will be required.

Our Returns Address

Returns
The Bicycle Barn
Hillhouse Farm Units
Worthing Road
West Grinstead
West Sussex
RH13 8LG

We always recommend using a tracked returns service if posting items back, as you are responsible for the safe delivery of any returns. If a warranty Item please contact us and we will organise a collection/return.

Shimano Deore RD-M8120 XT 12-Speed Shadow+ SGS Double Rear Derailleur

Brand:Shimano

Code:RDM8120SGS

Xt shadow plus 12-speed double rear derailleur for the ultimate in shifting performance and durability.

Features:

  • Shadow plus features a super low profile design and optimized slant angle for super light shifting action
  • Shadow plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting
  • Single tension spring prevents contact with the chainstay resulting in a silent ride
  • Rubber bumper on pulley cage for added silent drive
  • 13t pulleys and decreased derailleur tension prevent high chain tension in low gears
  • Direct cable routing prevents snagging from any trail side hazards
  • Full carbon fibre outer pulley cage saves weight while alloy inner cage increases rigidity
  • Cold forged wide alloy links and pivot body
  • Four fluorine-coated link pin bushings
  • Strong return spring for a positive shifting feel
  • Specifically designed to work with XTR m9100 12-speed double drivetrains
  • Durable sealed 13t bearing pulleys for low friction
  • Top normal spring uses the spring to select higher gears
  • Max front difference 10t
  • Max low sprocket: 45t (2x 12-speed)
  • 45t capacity sgs cage
  • Average weight 290g
Sizing Information
Professional Opinion
Home Components Shimano Gears & Drivetrain