Shimano,Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage

This was a true Shimano Derailleur, I have order some before and they were packed in Shimano packaging and were off brand. It worked for my son’s bike. Price and performance are good for a kids bike that will end up taking a beating. Easy to install with some basic tools. Once dialed in it shifts like it should.

The Alivio derailleur 9 speed works great

Perfect replacement for the Bakcau Mule i had 1800 miles on my bike Was going through some mud while I was Turkey, hunting and coming out. I guess the derailer didn't like all the debris that was coming up into it. And it just ripped it off the bike. Anyway, order this replacement, it was a perfect fit. And now I'm back up and running again Remember, if you run any e bike a derailer hanger is a must have. Because it acts as a sheer pin and it won't damage your frame with this type of catastrophic failure. I'm satisfied with the transaction and the seller and the price.It was well worth it

Bought to replace a damaged Altus. This one is a slimmer design that doesn't stick out much, thus less likely to be damaged when the bike falls or hits something (I guess that a guard that some bikes provide accomplishes the same thing). This design change makes the shifter cable enter from a different direction and was a bit of a challenge in my case because of the rack support obstruction. This version is supposed to be more accurate that the Altus but I can't tell. Word of caution: the spring is much stronger than in the Altus, so your thumb gets a workout shifting down to the larger cogs, especially into first or second gear.

I run this on my Fuji mountain bike in good and bad weather. On and off road. I use ALL my gears because I keep my cadence up during steep climbs and single track ups and downs. This rear derailleur does fine by me. My quick and multiple gear changes are good even under stressed conditions such as twisty uphill changes. I do not race but I do abuse my bikes for maximum fun. If you must replace your rear derailleur, be sure you haven't bent the rear dropout.

Works great

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.

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.

Muy bueno calidad precio, cambia los comicios muy suave

Prima

Cambio 9 V con vite di regolazione guaina , ottimo prodotto con spedizione ultraveloce , pacchetto un po’ anonimo ma completo x cui soddisfatto

Exactly according to the description and fast delivery!

20インチの折りたたみ自転車に取り付けました。 6sから9sにグレードアップさせたのですが、走行性能がかなりアップしたと感じました。 見た目も気に入っています。（もともとはTourneyを使用していました） しかしミニベロ勢にはオススメ出来ないかもです。取り付けて気が付きましたが、ディレイラーと地面とのクリアランスがこの商品ではあまり取れません。 自己責任で使用していますが、少し危なっかしいです。 20インチ（406）超であれば問題ないでしょう。 とにかく性能は非常に良い！