Altus Rear Derailleur for RD-M310 7/8 Speed for Mountain Bike Direct Mount

Exact fit for my REI gravel bike 8 speed Shimano Altus Derailleur. There is no chrome on this one, but otherwise it is indistinguishable from the original. It says Shimano. I appreciated that the cage could be opened to allow the chain to be inserted without opening a link. It went on with only a very small adjustment for the small sprocket overtravel. There is no documentation, so if you're inexperienced with this repair be sure to take a picture or two of the original installation before beginning. You'll need a decent set of metric Allen wrenches. It's easiest to set up if you set the shifter to the 4th gear and then place the chain on the 4th sprocket before tightening the cable clamp on the Derailleur. For the price this is a fine solution for a casual use bike.

This rear derailleur for 7/8 speed bikes looks awesome, shifts flawlessly, fits direct mount, and is easy to install and adjust. Installs and sets up in minutes. Great value for the money.

The screws that come with this to tighten and hold the wires were of low grade soft metal as were several others... the heads of the screws were striped with little and very careful tightening with the proper sized tools. Low grade metal. The Birdseye type pulleys were nothing special at all either.. no bearings just sleeve type. I would not purchase this again. I may send it back due to them saving a penny on low grade metal components. UPDATE 1.5 MONTHS after purchase: THE BODY OF THIS SNAPPED see photo. Confirming my thoughts above that this was Sub-Standard eye candy.

Exact replacement for my wife's Diamondback mountain bike. Works great amd functions perfectly.

Bought to replace the same exact one that came on my ebike. These arent the most durable derailleurs, but cheap enough to replace when they do fail or break. Can last tens of thousands of miles, or just a few

I needed to replace broken original rear derailleur on teenager’s primary mode of transportation - this product was better and it arrived quickly- so I could get kid back on her way.

this shifter has a smaller profile than the one I had on my trike, I also cut the mounting lug off and moved if forward on the frame, to give more contact, chain to sproket, itis also a litthe stiffer than the last one that kept bending on me. also haven't had any chain skipping, have over half the sproket seating with the chain. so far have almost a hundred miles peddled, and no issues. this shifter also shifts smother than the last piece of "junk" that I bought to replace the factory shifter,, which broke after 900 miles.headed for 3000 miles by the end of the year, at 73 years I need my exercise, 500 miles to go th reach my goal for the year, started riding the trike after my heart problem, been riding since april 2023.

These are direct mount but will fit on many older bikes with hanger derailleurs. And it's a good shifting Shimano, compatible with most of their index shifters. I've even mounted them on old steel 10 speeds racers, although I had to fit them to take 6 speed freewheels.

This derailer works great for my norco hybrid mountain bike and so far no complaints

Excelente producto tal como s eve en la foto, pero el mecánico me comentó que llegó un poco desnivelado, pero de fácil arreglo, sino tuvieran las cinco estrellas

My husband enjoys it

El producto es de muy mala calidad a los primeros cambios que se realizaron después de haberlo montado el desviador se rompió ,su material con el que está fabricado es totalmente plástico ,NADA RECOMENDABLE si lo que necesitan es algo resistente para la Montaña

Es un producto reacondicionado y de mala calidad apenas lo coloque se salieron los pasadores de seguro del tornillo de anclaje con la patilla de la bicicleta, tampoco tiene nada de lubricación ennlos resortes como los productos de fabrica. no recomiendo este producto.