⚡ Shift like a pro, ride like you own the trail!
The Shimano Deore RD-M5120 Rear Derailleur is a robust, aluminum-constructed component designed for 10 and 11-speed drivetrains. With a maximum cassette capacity of 42 teeth, it delivers precise and reliable shifting performance, making it ideal for serious cyclists seeking durability and versatility on diverse terrains.
| Mounting Type | Braze-On Mount |
| Number of Teeth | 42 |
| Product Dimensions | 8"L x 5"W x 4"H |
| Manufacturer | Shimano |
| UPC | 192790618548 |
| Item Package Dimensions L x W x H | 6.3 x 4.72 x 2.32 inches |
| Package Weight | 0.35 Kilograms |
| Item Dimensions LxWxH | 8 x 5 x 4 inches |
| Brand Name | SHIMANO |
| Model Name | Rear Derailleur |
| Suggested Users | mens |
| Number of Items | 1 |
| Part Number | ERDM5120SGS |
| Size | 10/11 Speed |
| Sport Type | Cycling |
J**E
Shifts great
Works great as long as you install the cable correctly. The end of the cable does a U-turn around the clamping screw. If you flip the cable around so that the U faces the wrong way it won't shift correctly.
D**I
Shifts like butter
Shifts like a xtr at the fraction of the cost just a bit heavier but not noticeable at all.
V**C
Buenas
Muy buena. La recomiendo
M**
Excelente producto
Recibí el producto tolmente original tal cual lo que esperaba.
P**
Adjustable clutch
Typical great Shimano build quality and durability. The clutch is adjustable and can be turned on or off. Shifts perfectly with clutch off. Down shifts can be clunky with the clutch on and adjusted tightly. Only on the hardest hits is there any chain slap and the chain has never come off.
B**5
Works very well, but your frame may cause issues
I bought this as part of an upgrade frenzy on my 1x7 Schwinn Boundary. The original rear hub failed, so needed a new wheelset... which meant I could upgrade to a cassette... which meant I needed a new derailleur... you get the idea. I got this 10s Deore derailleur, a 10s Deore cassette (11-46t) and a 10s Deore shifter. Everything works great together, super fast and smooth shifts, no slips over the 20 miles I have put on it so far... however the derailleur doesn't hang low enough to engage the 2 biggest sprockets. Bought a Wolf Tooth roadlink which should solve the issue, but beware the frame of your bike could necessitate a similar solution. Other than that, highly recommend.
J**I
Excellent replacement
My Scott mountain bike uses the shimano derailer on the back. After breaking mine I needed a quick replacement. This is exactly the replacement part needed and I am already back riding in the mountains. Very fast shipping. I was up and riding much sooner than I had expected
C**S
Perfect for my restoration project
I put this on my vintage GT mountain bike as part of an updated 1x drivetrain. Works great! It shifts perfectly with very easy set up. Don’t make the mistake I did… I first tried to pair it with a 11-48 cassette but quickly realized it wouldn’t work, looked closer at the description, and saw that it maxes out with a 46t gear. No big deal though. Got an appropriate cassette and it all came together perfectly.
Trustpilot
2 weeks ago
2 months ago
