🚴♂️ Shift into adventure mode with Shimano’s stealthy precision!
The Shimano Alivio M3100 Rear Derailleur features advanced Shadow RD technology and a 9-speed HyperGlide system, delivering durable, smooth shifting for trail and trekking cyclists. Its SGS long cage design optimizes chain tension and protection, all within a sleek, low-profile frame backed by Shimano’s trusted 2-year warranty.
| Mounting Type | Braze-On Mount |
| Number of Teeth | 36 |
| Product Dimensions | 6.69"L x 4.43"W x 3.94"H |
| Manufacturer | Shimano |
| UPC | 192790621159 |
| Item Package Dimensions L x W x H | 7.83 x 4.72 x 4.21 inches |
| Package Weight | 0.38 Kilograms |
| Item Dimensions LxWxH | 6.69 x 4.33 x 3.94 inches |
| Brand Name | SHIMANO |
| Warranty Description | 2 Year Manufacturer |
| Model Name | C8C086 |
| Suggested Users | unisex |
| Number of Items | 1 |
| Part Number | ERDM3100SGS |
| Model Year | 2021 |
| Style | Single |
| Included Components | Bike Parts |
| Size | standard size |
| Sport Type | Cycling |
M**H
Easy change
Derailed sent was in good condition. Able to replace Shimano 105 short cage on old Giant Defy to accommodate larger cassette. Seems to work very well
B**.
Good derailure, very interesting design.
This was an inexpensive Shimano Alvio class derailure system that I bought for my old Rans Nimbus long wheelbase recumbent. The freewheel is a Shimano 7 speed mega and I also changed out the shifter from a Revoshift to a Shimano trigger shifter.What surprised me was how close the derailure rides next to the wheel spokes. It never touched but I had to tie the cable tail back so I wouldn't touch the spokes.It shifts very well especially after changing out the old chain to a KMC 8 speed.
J**S
Works on 10-speed Shimano 105 road bike
Being older and bigger guy I need to have a granny gear for climbing the 7-9% grades in western New Mexico. After talking with a mechanic from the Trek SuperStore in Albuquerque he said that this would allow me to run a 11-36t 10-speed cassette on my Bianchi road bike using Shimano 105 shifters. Even though it is labeled as 9-speed, it works well with the 10-speed set up. The only major issue was dialing in the B screw on the back to get a gap so that gears don't touch the freewheels of the derailleur.
J**T
Check the cable indexing on your shifter for compatibility
Shimano's mid tier drive train offerings are as slick shifting and durably well made as 99% of the cycling population will ever require. That said, the cable pull ratio isn't compatible with my shifter. Had to buy the M591 9sp derailleur.
A**N
Works great in the 9 speed application
Always reliably hits the gear.
B**0
Very nice
This is obviously way overkill for the cheap application I had for it. I was just replacing an old shimano flat face. This shifts like a dream. So smooth.
B**R
well i expected more
shimano name , not great quality ,returned mine,brought Deore
M**5
Not High Quality..
It worked almost 5500 miles and all the pins and linkages are moving freely. The chain is rubbing to the arms.Not expected at all.I replaced it today.
