🚵♂️ Shift like a pro, ride like a legend!
The Shimano Deore RD-M5120 Rear Derailleur features a durable aluminum construction and SHIMANO SHADOW RD+ low profile design to protect against trail damage. It supports 10 and 11-speed drivetrains with a cassette range up to 46t, delivering precise, quiet shifting and enhanced chain stability for mountain biking performance.
| Product Dimensions | 8"L x 5"W x 4"H |
| Manufacturer | Shimano |
| UPC | 192790618548 |
| Item Package Dimensions L x W x H | 7.76 x 4.92 x 3.7 inches |
| Package Weight | 0.44 Kilograms |
| Item Dimensions LxWxH | 8 x 5 x 4 inches |
| Brand Name | SHIMANO |
| Warranty Description | Limited Warranty |
| Model Name | Rear Derailleur |
| Suggested Users | mens |
| Number of Items | 1 |
| Part Number | ERDM5120SGS |
| Included Components | Rear Derailleur |
| Size | 10/11 Speed |
| Sport Type | Cycling |
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.
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.
T**T
Great mate to Shimano SL-BS77 Dura Ace Double/Triple Bar End Shifters
My recumbent requires a long cage shifter due to its long & convoluted chain path.This is a perfect replacement for the Shimano Dura Ace RD-7700, and a perfect mare to Shimano SL-BS77 Dura Ace Double/Triple Bar End Shifters.Simple to install, and very smooth shifting.
A**R
Keep a spare !
Exact fit ! Went right on ! Easy install ! Maintains the correct tension and seems to be OEM quality
M**S
Faster and cheaper than my local bike shop
Exact Shimano part for my Trek bike, cheaper than my local bike shop and Amazon got it to me super quickly.
L**C
Well worth it
This thing exceeded my expectations. I was upgrading my mountain bike from a 3X9 to a 2X11. The clutch feature is awesome. I have not had a single chain slap or chain disengagement from the chain rings. It keeps good tension on the chain to prevent both of those situations. However,I did have to adjust the clutch out of the box, because it was set too tight from the manufacturer. Once I learned how to do it it was fairly simple. You can find out how to do it on YouTube.Like I said, though this is far exceeded my expectations: it shifts cleanly, and the clutch feature (I didn’t even know was a thing) was a nice surprise.
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.
S**S
Excellent derailleur...
A little more complicated to set up than old school derailleurs but excellent.
Trustpilot
1 month ago
1 month ago
