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⚡ Shift like a pro, ride like a legend.
The Shimano Deore XT RD-M8100-SGS/RD-M8120-SGS is a premium 12-speed long cage rear derailleur engineered for mountain biking. Featuring Shadow+ technology for stable, quiet chain retention and a durable alloy steel build, it delivers precise, shock-free shifting optimized for 2x12 drivetrain setups. Trusted by enthusiasts for seamless upgrades and reliable performance on demanding trails.
| ASIN | B07SWQZB46 |
| Best Sellers Rank | 62,068 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 63 in Bike Rear Dérailleurs |
| Brand Name | SHIMANO |
| Case Material Type | Alloy Steel |
| Colour | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (560) |
| Global Trade Identification Number | 04550170443641 |
| Included Components | Shimano Deore XT |
| Item Dimensions L x W x H | 17.8L x 17.8W x 12.7H centimetres |
| Item Type Name | Brakes & Shifters |
| Item Weight | 200 Grams |
| League Name | Shimano |
| Manufacturer | Shimano Deore XT |
| Manufacturer Part Number | 587830 |
| Manufacturer Warranty Description | 1 year manufacturer |
| Material Type | Other |
| Model Number | 587830 |
| Mount Type | Clamp-On Mount |
| Number of Teeth | 26 |
| UPC | 192790443645 |
M**.
Genuine
Replaced a completely mangled one after a boulder strike - good value
M**S
Well worth the Upgarde
Upgraded from Sram XS system to this Shimano XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage also with Shimano XT8100 shifter and just wow so much smoother this is when changing gears and it just works straight out the box when fitted a little adjustment was needed but not as much with the Sram. Well worth the upgrade
T**K
Superb
The usual super Shimano quality. The shifting is crisp and accurate and installed without issue , i always default to Shimano XT. im a very happy cyclist
K**A
Works perfect
This definitely was a great upgrade from slx smooth shifting easy to adjust and delivery came the next day before 12pm 👍
A**R
Was what was ordered
Was what was ordered
A**.
Very good quality product
Very good quality product
B**S
Clutch seized
Seems unsuitable for Scottish weather. Clutch was rusted after one year of light use.
A**O
Ciò che cercavo ad un prezzo competitivo, per il resto la solita ottima qualità Shimano
S**O
El producto llego como lo espectaba, ya había utilizado esta calidad de desviador y por este motivo lo volví a comprar.
D**9
やはりシマノ。信頼性、設定もよし。
F**A
Article conforme à la description vendu à un prix défiant toute concurrence, je suis très satisfait de mon achat.
C**N
Titre et description erronée Attention, le dérailleur n'est pas un M8100 mais un M8120. Différence avec le 8100, pas adapté au mono-plateau et limité à 45d sur la cassette. Arrive sans emballage d'origine shimano, dans un sachet..
Trustpilot
1 month ago
2 weeks ago