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SHIMANO DEORE XT - Rear Derailleur - SHIMANO SHADOW RD+ - 2x12-speed
Shimano Rear Derailleur 2x12s SGS RD-M8120 Deore XT Shadow+ Double, Black
SHIMANO DEORE XT - Rear Derailleur - SHIMANO SHADOW RD+ - 2x12-speed
IRDM8120SGS
€129.99
€90.99
Save 30%
VAT included
You save €39.00 (30%) on the manufacturer's recommended price
Price history
- Today's price
- €90.99
- Lowest price of the last 30 days
- €90.99
- Manufacturer's recommended price
- €129.99 (30% less)
The price has not been reduced in the last 30 days. The recommended price is set by the manufacturer and is shown for reference only.
FREE SHIPPING IN ITALY FROM 129,99 EUROS*
100% SECURE CHECKOUT
N.1 in Italy in the Bike and E-Bike Shops
The all-new SHIMANO DEORE XT M8100 series of derailleurs brings a new level of drivetrain silence thank to decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with SHIMANO's new 12-speed cassettes boosts range.
Fast and precise shifting performance optimized to take on any trail
Faster and shockless shifting
HYPERGLIDE+
Extra wide range with front double 36-26T & close step 12-speed drivetrain with low sprocket combination -10-45T
Silent drivetrain in all gear positions
Decreased rear derailleur and chain tension in low gear
New bumper added to rear derailleur pulley cage
Bump Stopper
Bigger 13T pulley
Stable drivetrain on rough terrain
Low-profile design
SHIMANO SHADOW RD+
SPECIFICATIONS
MODEL NO: RD-M8120-SGS
SERIES: DEORE XT M8100 Series
Color: Series color
Average weight: 290
Compatible chain: HG 12-speed
Total capacity: 45T
B-axle_Hollow axle: Yes
Mount_Direct attachment (Conventional): Yes
Fluoric coated link bushings: 7
Low sprocket_Max.: 45T
Low sprocket_Min.: 45T
Max. front difference: 10T
Pulley_G pulley bearing: Sealed Bearing
Pulley_Sunken type pulley bolt: Yes
Pulley_Teeth: 13T
Pulley_T pulley bearing: Sealed Bearing
Pulley cage: SGS
Top-normal spring type_SHIMANO SHADOW RD+: Yes
Top sprocket_Max.: 10T
Top sprocket_Min.: 10T
Rear speeds: 12 (Front double)
IRDM8120SGS
Data sheet
- Speeds
- 12
- Code
- SH230923
- Compatible with
- Shimano
- Type
- Mechanical
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Who it is for and how to use it
Ideal for
Shimano 2x12v drivetrains for MTB and sport use
Designed for riders using a Shimano 2x12v drivetrain who want a mechanical rear derailleur with precise chain control. It works with HG 12-speed and with the SGS cage.
Those who want quieter, more stable shifting
Suitable for those looking for a quieter drivetrain and fast, precise shifting, even on rough ground. SHIMANO SHADOW RD+ technology helps reduce chain movement.
Those who prioritise reliability and weight control
Designed for riders who want a 290 g component with a dedicated rear-derailleur structure and the technical setup of the DEORE XT M8100 Series group.
Use cases
Ideal
Rides on rough ground
Stable drivetrain performance on rough ground and the low-profile design help maintain shifting control.
Terreno accidentato · Profili ribassato · Stabilità catena
Very suitable
Riding with fast, precise shifting
Shifting performance is described as fast and precise, with quick, smooth gear changes.
Cambiata rapida · Cambiata precisa · Meccanico
Very suitable
Use with a Shimano 12-speed cassette
Compatibility with the new SHIMANO 12v cassettes extends drivetrain management across close gear ratios.
Shimano · 12 velocità · Cassetta 12v
Suitable
Double-chainring drivetrain
The 2x12v setup with a 36-26D double chainring is indicated for riders using a close-ratio drivetrain.
2x12v · Doppia corona · 36-26D
Who it is for
Cyclist using a Shimano 2x12v drivetrain
- Looks for
- A mechanical rear derailleur compatible with Shimano, with HG 12-speed standard.
- Why
- RD-M8120-SGS suits this use with SHIMANO SHADOW RD+ and chain management designed for 12-speed systems.
Athlete looking for a quiet, precise rear derailleur
- Looks for
- A component that reduces noise and shift jolts.
- Why
- Reduced tension and the added bumper on the pulley cage point in this direction.
Frequently asked questions
What speed does this rear derailleur operate with?
It works with 12 speeds. The specification sheet also indicates compatibility with HG 12-speed.
Is it compatible with Shimano?
Yes, the indicated compatibility is Shimano. The specification sheet also associates it with the DEORE XT M8100 Series.
What is the component weight?
The indicated weight is 290 g. It is listed both as weight and component weight.
What type of derailleur is it?
It is a mechanical rear derailleur. The specification sheet identifies it as a Cambio component type.
What is the compatible chain standard?
The indicated standard is HG 12-speed. This data defines compatibility with the chain specified in the sheet.
Show all (6)
What is the exact model?
The indicated model is RD-M8120-SGS. The description also appears as SHIMANO DEORE XT M8100 Series.
Information prepared by the BSA team with the support of AI, based on the manufacturer's specifications.