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Mountain Bike Derailleur
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
Showing 1 to 45 of 112 Products
![Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur (Black) (12 Speed) (Long Cage) (SGS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/irdm815012sgs.jpg)
$374.99
Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur (Black) (12 Speed) (Long Cage) (SGS) (Shadow Plus) (Electronic) (E-MTB)
![Shimano SLX RD-M7000 Rear Derailleur (Grey) (11 Speed) (Medium Cage) (GS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/irdm700011gs.jpg)
Sale: $53.24
![Shimano Deore RD-M592 Rear Derailleur (Black) (9 Speed) (Long Cage) (SGS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/irdm592sgs.jpg)
Sale: $38.24
![Shimano Altus FD-M370-6 Front Derailleur (3 x 9 Speed) (28.6/31.8/34.9mm)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/efdm370x6.jpg)
$19.49
Shimano Altus FD-M370-6 Front Derailleur (3 x 9 Speed) (28.6/31.8/34.9mm) (Top Swing) (Dual Pull)
![Shimano Tourney RD-TX800 Rear Derailleur (Black/Silver) (7/8 Speed) (Long Cage) (SGS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/erdtx800sgsl.jpg)
Sale: $14.99
![Shimano Altus FD-M313-6 Front Derailleur (3 x 7/8 Speed) (28.6/31.8/34.9mm)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/efdm313x6.jpg)
Sale: $15.99
![Shimano Deore RD-M5120 Rear Derailleur (Black) (10/11 Speed) (Long Cage) (SGS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/erdm5120sgs.jpg)
Sale: $31.99
![Shimano Deore XT FD-M8000 Front Derailleur (3 x 11 Speed) (E-Type)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/ifdm8000e6x.jpg)
Sale: $31.87
![Shimano Deore RD-M4120 Rear Derailleur (Black) (10/11 Speed) (Long Cage) (SGS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/erdm4120sgs.jpg)
Sale: $30.37
![Shimano Tourney FD-TY510-TS6 Front Derailleur (3 x 6/7 Speed) (28.6/31.8/34.9mm)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/efdty510tsx6.jpg)
Sale: $8.99
![Microshift XLE Mountain Rear Derailleur (Black) (10 Speed) (Long Cage)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/microshift/rd-m62l.jpg)
See Price In Cart
Microshift XLE Mountain Rear Derailleur (Black) (10 Speed) (Long Cage) (Shimano Compatible)
![Shimano Deore XT RD-M8120 Rear Derailleur (Black) (Shadow Plus) (2 x 12-Speed) (Long Cage) (SGS)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/shimano/irdm8120sgs.jpg)
$118.99
Shimano Deore XT RD-M8120 Rear Derailleur (Black) (Shadow Plus) (2 x 12-Speed) (Long Cage) (SGS)
![Microshift MarvoLT M46 Rear Derailleur (Black) (8/9 Speed) (Long Cage)](https://images.nashbar.com/cdn-cgi/image/f=auto,width=200/images/large/bikes/microshift/rd-m46l.jpg)
Average Rating:5
$23.99
Microshift MarvoLT M46 Rear Derailleur (Black) (8/9 Speed) (Long Cage) (Shimano Compatible)