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Shop top brands' best prices on new bike front and rear derailleurs for your mountain or electric ride's DIY upgrade, installation, or overhaul. Light, strong, high-performance, affordable components for 12, 11, 10, and 9 speed Eagle, XTR, and XT drivetrains from SRAM, Shimano, and more!

Mountain Bike Derailleur

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Showing 1 to 45 of 127 Products

Shimano Deore XT RD-M786 Rear Derailleur (Black) (10 Speed)

$78.19 - $79.99

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Shimano Deore XT RD-M786 Rear Derailleur (Black) (10 Speed) (Shadow Plus)

Shimano Alivio RD-M3100 Rear Derailleur (Black) (9 Speed) (Long Cage) (SGS)

~~$36.99~~
Sale: $31.44

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Shimano Alivio RD-M3100 Rear Derailleur (Black) (9 Speed) (Long Cage) (SGS) (Shadow)

Shimano Tourney RD-TX800 Rear Derailleur (Black/Silver) (7/8 Speed) (Long Cage) (SGS)

~~$19.99~~
Sale: $14.99

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Shimano Tourney RD-TX800 Rear Derailleur (Black/Silver) (7/8 Speed) (Long Cage) (SGS)

Shimano Altus RD-M310-S Rear Derailleur (Silver) (7/8 Speed) (Long Cage)

~~$25.49~~
Sale: $18.37

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Shimano Altus RD-M310-S Rear Derailleur (Silver) (7/8 Speed) (Long Cage)

Shimano Altus FD-M313-6 Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm)

~~$19.25~~
Sale: $14.60

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Shimano Altus FD-M313-6 Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm) (Down Swing) (Dual Pull)

Shimano Altus FD-M310-6 Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm)

~~$17.49~~
Sale: $15.99

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Shimano Altus FD-M310-6 Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm) (Top Swing) (Dual Pull)

Shimano Deore RD-M6100 Rear Derailleur (Black) (12 Speed) (Long Cage) (SGS)

~~$56.99~~
Sale: $53.99

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Shimano Deore RD-M6100 Rear Derailleur (Black) (12 Speed) (Long Cage) (SGS) (Shadow Plus)

Shimano Deore RD-M5120 Rear Derailleur (Black) (10/11 Speed) (Long Cage) (SGS)

~~$38.99~~
Sale: $34.99

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Shimano Deore RD-M5120 Rear Derailleur (Black) (10/11 Speed) (Long Cage) (SGS) (Shadow Plus)

Shimano Deore XT Di2 RD-M8050 Rear Derailleur (Black) (11 Speed) (Medium Cage) (GS)

~~$329.99~~
Sale: $259.99

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Shimano Deore XT Di2 RD-M8050 Rear Derailleur (Black) (11 Speed) (Medium Cage) (GS) (Shadow Plus) (Electronic)

Shimano Deore FD-M4100 Front Derailleur (2 x 10 Speed)

$20.62 - $23.24

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Shimano Deore FD-M4100 Front Derailleur (2 x 10 Speed) (Side Swing) (Front Pull) (48.8/51.8mm Chainline)

Shimano Deore XT RD-M8000 Rear Derailleur (Black) (11 Speed)

$79.99 - $84.99

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Shimano Deore XT RD-M8000 Rear Derailleur (Black) (11 Speed) (Shadow Plus)

Box One Rear Derailleur (Black) (11 Speed) (Wide Cage)

~~$157.99~~
Sale: $142.19

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Box One Rear Derailleur (Black) (11 Speed) (Wide Cage) (Clutch)

Box One 11S Rear Derailleur (Matte Onyx) (11 Speed) (Wide Cage)

~~$131.99~~
Sale: $118.79

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Box One 11S Rear Derailleur (Matte Onyx) (11 Speed) (Wide Cage) (Clutch)

Box Four Prime 9 Derailleur (Black) (8 Speed) (Wide Cage)

~~$68.99~~
Sale: $62.09

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Box Four Prime 9 Derailleur (Black) (8 Speed) (Wide Cage) (Clutch)

Shimano XTR Di2 RD-M9050 Rear Derailleur (Black) (11 Speed) (Medium Cage) (GS)

~~$619.99~~
Sale: $449.33

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Shimano XTR Di2 RD-M9050 Rear Derailleur (Black) (11 Speed) (Medium Cage) (GS) (Shadow Plus) (Electronic)

Shimano Deore XT Di2 FD-M8070 Front Derailleur (2 x 11 Speed) (Braze-On)

~~$207.99~~
Sale: $155.99

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Shimano Deore XT Di2 FD-M8070 Front Derailleur (2 x 11 Speed) (Braze-On) (Down Swing) (Electronic)

Shimano Alivio FD-M3120 Front Derailleur (2 x 9 Speed)

~~$24.49~~
Sale: $18.37

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Shimano Alivio FD-M3120 Front Derailleur (2 x 9 Speed) (Side Swing) (Front Pull)

Shimano Altus FD-M371-6 Front Derailleur (3 x 9 Speed) (28.6/31.8/34.9mm)

~~$21.99~~
Sale: $19.49

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Shimano Altus FD-M371-6 Front Derailleur (3 x 9 Speed) (28.6/31.8/34.9mm) (Down Swing) (Dual Pull)

Shimano Deore RD-M6000 Rear Derailleur (Black) (10 Speed)

$59.49 - $63.89

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Shimano Deore RD-M6000 Rear Derailleur (Black) (10 Speed) (Shadow Plus)

Shimano Tourney RD-TZ500 Rear Derailleur (Black) (6 Speed)

$10.49 - $11.99

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Shimano Tourney RD-TZ500 Rear Derailleur (Black) (6 Speed)

Shimano Tourney FD-TX800 Front Derailleur (3 x 7/8 Speed)

$10.49 - $11.24

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Shimano Tourney FD-TX800 Front Derailleur (3 x 7/8 Speed) (Top Swing) (Dual Pull)

Shimano Deore FD-M6000 Front Derailleur (3 x 10 Speed)

$20.99 - $32.99

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Shimano Deore FD-M6000 Front Derailleur (3 x 10 Speed) (Side Swing) (Front Pull)

Shimano Altus FD-M2000 Front Derailleur (3 x 9 Speed)

$14.62 - $19.49

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Shimano Altus FD-M2000 Front Derailleur (3 x 9 Speed) (Dual Pull)

Shimano Tourney RD-TY300 Rear Derailleur (Black) (6/7 Speed)

$7.99 - $13.99

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Shimano Tourney RD-TY300 Rear Derailleur (Black) (6/7 Speed)

Shimano Tourney FD-TY600-L3 Front Derailleur (3 x 6/7/8 Speed) (31.8/34.9mm)

~~$13.99~~
Sale: $10.49

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Shimano Tourney FD-TY600-L3 Front Derailleur (3 x 6/7/8 Speed) (31.8/34.9mm) (Top Swing) (Dual Pull) (42T Max)

Shimano Tourney FD-TY600-L6 Front Derailleur (3 x 6/7/8 Speed) (31.8/34.9mm)

~~$13.99~~
Sale: $9.79

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Shimano Tourney FD-TY600-L6 Front Derailleur (3 x 6/7/8 Speed) (31.8/34.9mm) (Top Swing) (Dual Pull) (42T Max)

Shimano SLX RD-M7000 Rear Derailleur (Grey) (11 Speed) (Medium Cage) (GS)

~~$70.99~~
Sale: $54.99

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Shimano SLX RD-M7000 Rear Derailleur (Grey) (11 Speed) (Medium Cage) (GS) (Shadow Plus)

Shimano Alivio FD-M3100-M Front Derailleur (3 x 9 Speed) (28.6/31.8/34.9mm)

~~$24.49~~
Sale: $18.37

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Shimano Alivio FD-M3100-M Front Derailleur (3 x 9 Speed) (28.6/31.8/34.9mm) (Side Swing)

Shimano Deore XT FD-M8000 Front Derailleur (3 x 11 Speed) (E-Type)

~~$42.49~~
Sale: $27.62

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Shimano Deore XT FD-M8000 Front Derailleur (3 x 11 Speed) (E-Type) (Side Swing) (Front Pull)

Shimano Deore FD-M5100 Front Derailleur (2 x 11 Speed)

$23.62 - $30.49

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Shimano Deore FD-M5100 Front Derailleur (2 x 11 Speed) (Side Swing) (Front Pull) (48.8/51.8mm Chainline)

Shimano XTR RD-M9000 Rear Derailleur (Black) (11 Speed) (Long Cage) (SGS)

~~$212.99~~
Sale: $189.99

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Shimano XTR RD-M9000 Rear Derailleur (Black) (11 Speed) (Long Cage) (SGS) (Shadow Plus)

Shimano XTR Di2 FD-M9050 Front Derailleur (3 x 11 Speed) (Without Bracket)

~~$399.99~~
Sale: $290.83

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Shimano XTR Di2 FD-M9050 Front Derailleur (3 x 11 Speed) (Without Bracket) (Down Swing) (Electronic)

Shimano Deore XT FD-M8025-E Front Derailleur (2 x 11 Speed) (E-Type)

~~$42.49~~
Sale: $27.62

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Shimano Deore XT FD-M8025-E Front Derailleur (2 x 11 Speed) (E-Type) (Top Swing) (Bottom Pull)

SRAM GX Rear Derailleur (Black) (10 Speed)

$61.99 - $70.99

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SRAM GX Rear Derailleur (Black) (10 Speed) (Clutch)

Shimano XTR Di2 FD-M9070 Front Derailleur (2 x 11 Speed) (Without Bracket)

~~$399.99~~
Sale: $290.13

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Shimano XTR Di2 FD-M9070 Front Derailleur (2 x 11 Speed) (Without Bracket) (Down Swing) (Electronic)

Shimano Tourney RD-TY500 Rear Derailleur (Black) (6/7 Speed)

$11.99 - $18.99

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Shimano Tourney RD-TY500 Rear Derailleur (Black) (6/7 Speed)

Shimano Altus RD-M310-L Rear Derailleur (Black) (7/8 Speed) (Long Cage)

~~$27.49~~
Sale: $19.99

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Shimano Altus RD-M310-L Rear Derailleur (Black) (7/8 Speed) (Long Cage)

Shimano FD-TY606-L Front Derailleur (3 x 6/7/8 Speed) (Top Swing) (Dual Pull) (31.8/34.9mm)

~~$13.99~~
Sale: $10.49

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Shimano FD-TY606-L Front Derailleur (3 x 6/7/8 Speed) (Top Swing) (Dual Pull) (31.8/34.9mm)

SRAM GX Rear Derailleur (Black) (1 x 11 Speed) (Long Cage)

~~$118.99~~
Sale: $115.99

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SRAM GX Rear Derailleur (Black) (1 x 11 Speed) (Long Cage) (Clutch)

Shimano Tourney RD-A070 Rear Derailleur (Black) (7 Speed)

$15.37 - $22.99

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Shimano Tourney RD-A070 Rear Derailleur (Black) (7 Speed) (Smart Cage)

Shimano Deore RD-M4120 Rear Derailleur (Black) (10/11 Speed) (Long Cage) (SGS)

~~$40.49~~
Sale: $30.37

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Shimano Deore RD-M4120 Rear Derailleur (Black) (10/11 Speed) (Long Cage) (SGS) (Shadow)

Microshift Mezzo M36 Rear Derailleur (Black) (8/9 Speed) (Long Cage)

$20.99

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Microshift Mezzo M36 Rear Derailleur (Black) (8/9 Speed) (Long Cage) (Shimano Compatible)

SRAM SX Eagle Rear Derailleur (Black) (12 Speed) (Long Cage)

~~$84.99~~
Sale: $82.99

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SRAM SX Eagle Rear Derailleur (Black) (12 Speed) (Long Cage) (Clutch)

SRAM XX1 Rear Derailleur (Black/Red) (1 x 11 Speed) (Medium Cage)

$324.99

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SRAM XX1 Rear Derailleur (Black/Red) (1 x 11 Speed) (Medium Cage) (Clutch)

SRAM X5 Rear Derailleur (Black) (9 Speed)

$47.49

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SRAM X5 Rear Derailleur (Black) (9 Speed)

Shimano CUES RD-U8000 Rear Derailleur (Black) (1 x

Shimano CUES RD-U8000 Rear Derailleur Description: Designed for ...

an active urban lifestyle, the Shimano CUES RD-U8000 Shadow Plus rear derailleur offers smooth and decisive shifting performance for 1x11 speed drivetrains. The low-profile design and chain stabilization give riders confidence when ...

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Shimano CUES RD-U8020 Rear Derailleur (Black) (11-Speed) (Long

CUES RD-U8020-SGS Rear Derailleur Description: Explore the benefits ...

of trekking and urban e-biking with the Shimano CUES RD-U8020 Shadow+ rear derailleur's smooth and decisive shifting performance. The low-profile design and chain stabilization give riders the confidence to ride over rough ...

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Shimano GRX Di2 RD-RX817 Rear Derailleur (Black) (1

The Shimano GRX Di2 RD-RX817 rear derailleur features ...

an integrated chain stabilizer to keep the shifting smooth and precise over a variety of terrain. Features: SEIS (Shimano Electronic Intelligent System) Adjustable chain stabilizer prevents chain slapping and drops Switch stabilizer ...

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SRAM XX1 Eagle Rear Derailleur (Lunar Black) (12

Occupying a new realm in shifting performance, the ...

redesigned SRAM XX1 Eagle derailleur gives no-compromise racers and dream-bike builders a true top-tier option. The crisp, precise XX1 shifting feel athletes rely on now features an updated cage geometry for improved ...

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Microshift XLE Mountain Rear Derailleur (Black) (10 Speed)

Microshift XLE Rear Derailleurs are compatible with Shimano ...

mountain shifters. Increased chain stability and wide range parallelogram design let you power through any terrain with a wide selection of gear-ratios. Features: Compatible with wide range cassettes Strong spring tension for ...

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