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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 126 Products

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 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 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 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 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 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 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)

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

~~$17.99~~
Sale: $13.49

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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 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 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 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)

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 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-TY300 Rear Derailleur (Black) (6/7 Speed)

$7.99 - $11.24

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

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

~~$42.49~~
Sale: $31.87

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

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 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 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 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 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)

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-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 Tourney FD-A070-A Front Derailleur (2 x 7 Speed) (28.6/31.8mm)

~~$19.75~~
Sale: $13.83

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Shimano Tourney FD-A070-A Front Derailleur (2 x 7 Speed) (28.6/31.8mm) (Bottom Pull)

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 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 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 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 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)

SRAM GX Rear Derailleur (Black) (10 Speed)

$58.99 - $70.99

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

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-M8000 Front Derailleur (3 x 11 Speed) (E-Type)

~~$42.49~~
Sale: $31.87

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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 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-TZ500 Rear Derailleur (Black) (6 Speed)

$10.49 - $11.99

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

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

$23.62 - $32.99

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

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-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)

SRAM X5 Rear Derailleur (Black) (9 Speed)

$38.49 - $46.49

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SRAM X5 Rear Derailleur (Black) (9 Speed)

Microshift Mezzo Trekking Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm)

~~$11.99~~
Sale: $10.99

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Microshift Mezzo Trekking Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm) (Down Swing) (Dual Pull)

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

~~$324.99~~
Sale: $304.99

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

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

~~$82.99~~
Sale: $70.99

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

SRAM EX1 Rear Derailleur (Black) (8 Speed) (Clutch) (Long Cage)

~~$152.99~~
Sale: $123.99

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SRAM EX1 Rear Derailleur (Black) (8 Speed) (Clutch) (Long Cage)

SRAM X01 Rear Derailleur (Black/Red) (1 x 11 Speed) (Medium Cage)

~~$224.99~~
Sale: $219.99

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SRAM X01 Rear Derailleur (Black/Red) (1 x 11 Speed) (Medium Cage) (Clutch)

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 Ultegra RD-R8000 Rear Derailleur (Black) (11 Speed)

The Shimano Ultegra R8000 11-Speed Derailleur, modeled after ...

the Dura-Ace R9100, offers extended gear ratios of up to a 34 tooth cog (Medium Cage). The smooth and quick shift performance punches above its weight class. The derailleur features the Shimano ...

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Shimano GRX Di2 RD-RX815 Rear Derailleur (Black) (11

The Shimano GRX Di2 RD-RX815 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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Shimano Dura-Ace Di2 RD-R9150 Rear Derailleur (Black) (11

The Shimano Dura-Ace 9150 Di2 Electronic Groupset is ...

yet another bold leap forward in top-level bike racing technology. Time tested by pro riders and engineers, Shimano has added another layer on top of the highest level of components available today. ...

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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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