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Rear Derailleur Recommendations

Old 01-21-20, 12:03 PM
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mjac
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Rear Derailleur Recommendations

I cannot get my Rear Derailleur adjusted. I think it is just worn out. It has a lot of play at the swivel post and the cage doesn't look all that straight. I think I need a new Derailleur. What derailleurs do ya'll recommend that would be the best value for the money?...Thanks,mjac
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Old 01-21-20, 12:07 PM
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This begs for more information.

What do you mean by swivel post and rear derailleurs need to be compatible with the rest of your drivetrain.
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Old 01-21-20, 12:19 PM
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Road bike or mountain bike? If the road bike; shimano 105, if the mountain bike; Shimano XTR M9100.
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Old 01-21-20, 12:21 PM
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Your rear derailleur has to be compatible with your shifter. Without knowing what shifter and rear derailleur you currently have it is impossible to recommend anything
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Old 01-21-20, 02:26 PM
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Anything you can steal.
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Old 01-21-20, 06:54 PM
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I was nowhere near descriptive enough. It is a 15 year old Schwinn Varsity Road Bike with the polished aluminum frame. It has a 14 - 28 Shimano Original Equipmet Replacement 7 speed free wheel, a 52T Shimano BioPace Chain Ring, a Shimano Acera Rapid Fire Shifter mounted horizontally on the aero bars and an old Shimano Journey Shifter that was bought used. By the swivel post I mean the axle that the derailleur swivels on forward and backward to take up the slack in the chain.


After I posted I looked on Amazon again and searched Acera since that is the type of shifter I have. I found an Acera Mountain Bike Derailleur RD-M360 that looked more rugged then the others Aceras. In the description it said it has quick,crisp shifts especially with the Acera Shifter. So I called up an Old School Bike Shop, since I talked to them about it earlier and had him order me one. It is supposed to be a step up from the Journey.


What are ya'lls thoughts...Thanks,mjac
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Old 01-21-20, 08:32 PM
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It's Tourney, which is totally suitable for 7 speed.
As you go up the food chain, DER's get narrower & more finicky as the number of cogs increase.
This can result in more chain rub etc. than the "cheaper" part.
The RD-M360 seems suitable though, since it appears to be listed as 7/8 speed.
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Old 01-21-20, 08:36 PM
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I've been using Deore M591 RD's on all my old 7 speed bikes. It's listed for 9 speed drivetrains but, works fine as long as you're using a Shimano SIS or STI 7 speed shifter. And, you can usually find them for $25 to $30 on ebay.
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Old 01-21-20, 08:37 PM
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Originally Posted by mjac View Post
I cannot get my Rear Derailleur adjusted. I think it is just worn out. It has a lot of play at the swivel post and the cage doesn't look all that straight. I think I need a new Derailleur. What derailleurs do ya'll recommend that would be the best value for the money?...Thanks,mjac
Make sure your derailleur hangar is straight before you start buying new derailleurs.
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Old 01-21-20, 11:12 PM
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Originally Posted by Bill Kapaun View Post
It's Tourney, which is totally suitable for 7 speed.
As you go up the food chain, DER's get narrower & more finicky as the number of cogs increase.
This can result in more chain rub etc. than the "cheaper" part.
The RD-M360 seems suitable though, since it appears to be listed as 7/8 speed.
The Tourney is suitable, I think it is just worn out. Too much play to precise. I picked the Acera because I have an Acera shifter and they say the Acera Derailleur works great with the Acera Shifter. It looks pretty ruggedly built. Don't know what the Bike Shop is going to charge me but Amazon has it for $25.
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Old 01-21-20, 11:16 PM
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Originally Posted by ramzilla View Post
I've been using Deore M591 RD's on all my old 7 speed bikes. It's listed for 9 speed drivetrains but, works fine as long as you're using a Shimano SIS or STI 7 speed shifter. And, you can usually find them for $25 to $30 on ebay.
This Derailleur is listed for 7-8 so that should not be an issue.
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Old 01-21-20, 11:16 PM
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Originally Posted by mjac View Post
The Tourney is suitable, I think it is just worn out. Too much play to precise. I picked the Acera because I have an Acera shifter and they say the Acera Derailleur works great with the Acera Shifter. It looks pretty ruggedly built. Don't know what the Bike Shop is going to charge me but Amazon has it for $25.
I'm not sure who "they" are, but 9 speed & less mountain components all play pretty well together.
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Old 01-21-20, 11:20 PM
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Originally Posted by Kapusta View Post
Make sure your derailleur hangar is straight before you start buying new derailleurs.
I have been caught by that before. Nothing was working and the tab was bent over toward the freewheel. I have straightened that thing so many times I am amazed I didn't break it.
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Old 01-21-20, 11:48 PM
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Originally Posted by Bill Kapaun View Post
I'm not sure who "they" are, but 9 speed & less mountain components all play pretty well together.
"They" is Shimano in their product description. They recommend using the Acera Derailleur with the Acera Shifter. That is why I got the Acera Derailleur because I have a Acera shifter. Looks like a pretty solid shifter.
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Old 01-22-20, 07:23 AM
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If your shifter is shimano 7 speed, any shimano 7, 8, or 9 speed MTB derailleur will work perfectly.
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Old 01-22-20, 08:09 PM
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Originally Posted by Kapusta View Post
If your shifter is shimano 7 speed, any shimano 7, 8, or 9 speed MTB derailleur will work perfectly.
Need to know hanger or direct mount.
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Old 01-22-20, 08:26 PM
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Originally Posted by Retro Grouch View Post
Need to know hanger or direct mount.
His bike is 15 years old with a 7 speed Alivio RD. It has a hangar.
Any 9sp or lower Shadow RD will be backwards compatible with hangars.
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Old 01-23-20, 05:30 AM
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Originally Posted by Kapusta View Post
His bike is 15 years old with a 7 speed Alivio RD. It has a hangar.
Any 9sp or lower Shadow RD will be backwards compatible with hangars.
Over the phone I told the Bike Shop I had a small aluminum tab coming down from the frame that the Derailleur mounted to. He called that a Direct Mount. He said the other is an Axle Mount where the Derailleur mounts directly to the axle. Is this correct. Ya'll keep talking about hanger and direct mount. I assume the hanger is the small aluminum tab and Direct Mount is to the axle. Seems different from what he said. He might have been just a clerk though not the mechanic. Which one is the correct terminology?
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Old 01-23-20, 09:49 AM
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Originally Posted by mjac View Post
Over the phone I told the Bike Shop I had a small aluminum tab coming down from the frame that the Derailleur mounted to. He called that a Direct Mount. He said the other is an Axle Mount where the Derailleur mounts directly to the axle. Is this correct. Ya'll keep talking about hanger and direct mount. I assume the hanger is the small aluminum tab and Direct Mount is to the axle. Seems different from what he said. He might have been just a clerk though not the mechanic. Which one is the correct terminology?
Direct mount is different from a derailleur hanger though your verbal description to your bike shop could apply to either one.

This website has a description of both.

It sounds like your bike shop is referring to your aluminum hanger as a "direct mount", and a direct mount to the axle as an "axle mount", which is not consistent with the rest of the bike industry.
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Old 01-23-20, 11:37 AM
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Originally Posted by hokiefyd View Post
Direct mount is different from a derailleur hanger though your verbal description to your bike shop could apply to either one.

This website has a description of both.

It sounds like your bike shop is referring to your aluminum hanger as a "direct mount", and a direct mount to the axle as an "axle mount", which is not consistent with the rest of the bike industry.
Exactly, the guy on the phone repeatedly referred to the derailleur mounted to the tab or hanger as Direct Mount and the derailleur mounted to the axle as axle mount. Even after I asked him because it did not make sense. The website also explained what backward mount is which I did not understand when it was mentioned in the forum.
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