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

Mountain Derailleurs

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Showing 1 to 45 of 110 Products

Shimano Deore XT RD-M8100 Rear Derailleur (Black) (12 Speed) (Shadow Plus)

$118.99 - $121.99

Shimano Deore XT RD-M8100 Rear Derailleur (Black) (12 Speed) (Shadow Plus)

SRAM Apex XPLR D1 Rear Derailleur (Black) (12 Speed)

$124.99

SRAM Apex XPLR D1 Rear Derailleur (Black) (12 Speed) (Mechanical)

SRAM Apex Eagle D1 Rear Derailleur (Black) (12 Speed)

$124.99

SRAM Apex Eagle D1 Rear Derailleur (Black) (12 Speed) (Mechanical)

SRAM GX Eagle T-Type AXS Transmission Rear Derailleur (Black) (12 Speed)

$400.00

SRAM GX Eagle T-Type AXS Transmission Rear Derailleur (Black) (12 Speed)

SRAM XO T-Type Eagle AXS Transmission Rear Derailleur (Black) (12 Speed)

$550.00

SRAM XO T-Type Eagle AXS Transmission Rear Derailleur (Black) (12 Speed)

SRAM XX SL T-Type Eagle AXS Transmission Rear Derailleur (Black) (12 Speed)

$650.00

SRAM XX SL T-Type Eagle AXS Transmission Rear Derailleur (Black) (12 Speed)

SRAM XX T-Type Eagle AXS Transmission Rear Derailleur (Black/Silver) (12 Speed)

$650.00

SRAM XX T-Type Eagle AXS Transmission Rear Derailleur (Black/Silver) (12 Speed)

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

~~$399.99~~
Sale: $319.99

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

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

$53.99

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

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

~~$399.99~~
Sale: $279.99

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

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

Average Rating:5

$207.99

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

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

$212.99

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

Shimano XTR RD-M9100 Rear Derailleur (Black) (1 x 12 Speed)

$273.99

Shimano XTR RD-M9100 Rear Derailleur (Black) (1 x 12 Speed) (Shadow Plus)

Shimano XTR RD-M9120 Rear Derailleur (Grey) (2 x 12-Speed)

$272.99

Shimano XTR RD-M9120 Rear Derailleur (Grey) (2 x 12-Speed) (Shadow Plus)

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

Average Rating:5

$115.99

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

SRAM GX Rear Derailleur (Black) (2 x 11 Speed)

$121.99 - $123.99

SRAM GX Rear Derailleur (Black) (2 x 11 Speed) (Clutch)

SRAM X01 Eagle AXS Rear Derailleur (Black/Red) (12 Speed)

$538.00

SRAM X01 Eagle AXS Rear Derailleur (Black/Red) (12 Speed) (Clutch) (Electronic)

SRAM X01 Eagle Rear Derailleur (Red) (12 Speed)

$214.00

SRAM X01 Eagle Rear Derailleur (Red) (12 Speed) (Clutch)

SRAM X01 Eagle Rear Derailleur (Lunar) (12 Speed)

$214.00

SRAM X01 Eagle Rear Derailleur (Lunar) (12 Speed) (Clutch)

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

~~$131.99~~
Sale: $105.59

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

Box One Rear Derailleur (Black) (11 Speed)

~~$157.99~~
Sale: $126.39

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

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

~~$159.99~~
Sale: $152.99

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

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

~~$324.99~~
Sale: $309.99

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

SRAM GX Rear Deralleur (Black/Red) (1 x 11 Speed)

$121.99

SRAM GX Rear Deralleur (Black/Red) (1 x 11 Speed) (Clutch)

SRAM NX Eagle Rear Derailleur (Black) (1 x 12 Speed)

$115.00

SRAM NX Eagle Rear Derailleur (Black) (1 x 12 Speed) (Clutch)

SRAM X01 Eagle AXS Rear Derailleur (Lunar) (12 Speed)

$538.00

SRAM X01 Eagle AXS Rear Derailleur (Lunar) (12 Speed) (Clutch) (Electronic)

SRAM GX Eagle Rear Derailleur (Lunar) (12 Speed)

$135.00

SRAM GX Eagle Rear Derailleur (Lunar) (12 Speed) (Clutch)

SRAM XX1 Eagle Rear Derailleur (Lunar Black) (12 Speed)

$323.00

SRAM XX1 Eagle Rear Derailleur (Lunar Black) (12 Speed) (Clutch)

Box One Prime 9 Derailleur (Black) (9 Speed)

$194.99

Box One Prime 9 Derailleur (Black) (9 Speed) (Clutch)

Box Two 11S Rear Derailleur (Matte Onyx) (11 Speed)

~~$109.99~~
Sale: $87.99

Box Two 11S Rear Derailleur (Matte Onyx) (11 Speed) (Clutch)

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

~~$329.99~~
Sale: $263.99

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

SRAM GX Eagle AXS Rear Derailleur (Lunar) (12 Speed)

$390.00

SRAM GX Eagle AXS Rear Derailleur (Lunar) (12 Speed) (Clutch) (Electronic)

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

$619.99

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

Shimano DEORE XT Di2 RD-M8150-11 Rear Derailleur (Black) (11 Speed)

$374.99

Shimano DEORE XT Di2 RD-M8150-11 Rear Derailleur (Black) (11 Speed) (Shadow Plus) (Electronic) (E-MTB)

Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur (Black) (12 Speed)

$374.99

Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur (Black) (12 Speed) (Shadow Plus) (Electronic) (E-MTB)

SRAM XX1 Eagle AXS Rear Derailleur (Black) (12 Speed)

$753.00

SRAM XX1 Eagle AXS Rear Derailleur (Black) (12 Speed) (Clutch) (Electronic)

Shimano Deore XT RD-M8120 Rear Derailleur (Black) (Shadow Plus) (2 x 12-Speed)

$118.99

Shimano Deore XT RD-M8120 Rear Derailleur (Black) (Shadow Plus) (2 x 12-Speed)

SRAM GX Rear Derailleur (Black) (10 Speed)

$52.99 - $67.99

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

Shimano Deore FD-M6025-E 2x10 Front Derailleur (E-Type) (Bottom-Pull)

~~$36.49~~
Sale: $18.36

Shimano Deore FD-M6025-E 2x10 Front Derailleur (E-Type) (Bottom-Pull) (Top Swing)

SCRATCH & DENT: Shimano Deore XT RD-M8000 SGS Rear Derailleur

~~$100.99~~
Sale: $76.99

SCRATCH & DENT: Shimano Deore XT RD-M8000 SGS Rear Derailleur (for 1x, 2x, or 3x)

Shimano Xtr M985 2X10-Speed Multi-Clamp Top-Swing Front Derailleur For Mountain Double Cranks

$91.99

In Select Stores

Shimano Xtr M985 2X10-Speed Multi-Clamp Top-Swing Front Derailleur For Mountain Double Cranks

Available in Stores

Microshift Advent X Rear Derailleur (Black) (10 Speed)

$70.99

Microshift Advent X Rear Derailleur (Black) (10 Speed) (Clutch)

Shimano Tourney FD-A070-A Front Derailleur (2 x 7 Speed)

~~$19.75~~
Sale: $15.80

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

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

$20.99 - $21.99

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

Shimano Alivio FD-M3100-M Front Derailleur (3 x 9 Speed)

$24.49

Shimano Alivio FD-M3100-M Front Derailleur (3 x 9 Speed) (Side Swing)