Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Rear derailer replacement.

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Rear derailer replacement.

Old 09-01-19, 12:51 PM
  #1  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Rear derailer replacement.

Short of it. Wife picked up junk bike someone threw out, wants me to fix it for son-in-law.

Please note, I'm not assuming any quality here, she just wants to give him a bike to ride with his son.

It is a GT Agreessor Pro, Chinese made bike. It has a Shimano Acera derailer missing

the top small sprocket. The other one has 13 teeth.

I'm not knowledgeable about bikes but handy enough to do a replacement. If I had the sprocket and bolt,

I'd install that. Are those parts sold separately?

If I found another junk bike with a Shimano 13 T derailer any reason that wouldn't work.

If not, are derailers standard? Meaning, can I just order any derailer from Ebay or Amazon and it would fit?

Can I assume the GT Agreessor Chain is Standard?
EDIT to add,
This is a part I'm thinking about ordering, (if I need to order), I picked it because it has 13 T others don't.
Ah, need to give Ebay description, I don't have enough posts for to post URLs.
So here is an Ebay search term that brings up the derailer
SHIMANO RD-M360-SGS ACERA 7/8 SPEED BLACK DIRECT MOUNT REAR DERAILLEUR-NO PACKAG


Thanks for any enlightenment you can add, Mikek

Last edited by Qmavam; 09-01-19 at 01:00 PM. Reason: Add part I'm contemplating ordering.
Qmavam is offline  
Old 09-01-19, 01:04 PM
  #2  
ddeand 
Senior Member
 
ddeand's Avatar
 
Join Date: Jul 2004
Location: Twin Cities
Posts: 731
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 134 Post(s)
Liked 21 Times in 10 Posts
Like this?
https://www.ebay.com/itm/Road-Bicycl...aLv3Gwm09wu1uQ
__________________
Some days, it's not even worth gnawing through the restraints.
ddeand is offline  
Old 09-01-19, 01:18 PM
  #3  
dedhed
SE Wis
 
dedhed's Avatar
 
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 5,218

Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400

Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 740 Post(s)
Liked 97 Times in 78 Posts
Any long cage shimano derailleur from the 6-9 speed era will index correctly with the shifters.
Plan on replacing the cables (inner & housing) and likely flushing old, hard grease out of the shifters with WD40.
Yes you can replace the pulley, but it needs to be a "G" pulley that has some side to side movement to allow smooth running. Bolt might be harder to find if it's missing.
The one you linked is fine.
Another Shimano from a junk bike would work (correct mount, cage length) 11T - 13t really doesn't matter.

If you have a bike coop nearby you can probably buy a good used one for cheap.

Any 6/7/8 speed chain is fine KMC, SRAM etc.
dedhed is offline  
Old 09-01-19, 01:22 PM
  #4  
hokiefyd
Senior Member
 
Join Date: Feb 2017
Location: Northern Shenandoah Valley
Posts: 2,451

Bikes: 2018 Redline Zander, 2018 Giant Roam 2, 1997 Trek 750, 1981 Peugeot PBN10, 1970 Peugeot UO-18

Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 843 Post(s)
Liked 102 Times in 82 Posts
Yes -- the RD-M360 is the exact derailleur, but any derailler that advertises compatibility with 6/7/8/9 speeds will work. It's definitely a bike worth making right again. They were and are sold by Dick's Sporting Goods and are decent entry level MTBs. They have a freehub rear wheel (vs. freewheel) and disc brakes that could be upgraded to any type of hydraulic brake. Get it running, and it can grow and evolve with the rider's desire and skill level.
hokiefyd is offline  
Old 09-01-19, 07:05 PM
  #5  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks all,
I ordered the sprocket, hopefully I'll find a bolt locally that I can make work.
If it doesn't work after that, I'll order the whole unit.
Mikek
Qmavam is offline  
Old 09-02-19, 03:17 AM
  #6  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 296

Bikes: Diamondback Wildwood Classic

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Liked 13 Times in 13 Posts
Originally Posted by Qmavam View Post
Thanks all,
I ordered the sprocket, hopefully I'll find a bolt locally that I can make work.
If it doesn't work after that, I'll order the whole unit.
Mikek

I hope you are not in a rush, that part is coming from china.

PM me your address and I'll send you a bolt that should work
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.
JoeTBM is offline  
Old 09-02-19, 07:29 AM
  #7  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,643

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 1212 Post(s)
Likes: 0
Liked 55 Times in 50 Posts
Originally Posted by Qmavam View Post
I ordered the sprocket, hopefully I'll find a bolt locally that I can make work.
If it doesn't work after that, I'll order the whole unit.
You need the correct bolt. OEM bolts are "shoulder bolts" meaning they are threaded only part way so they screw in a specific distance and then stop thus maintaining the correct gap for the pulley to fit in. The threading is M5x0.8.
HillRider is offline  
Old 09-02-19, 09:05 AM
  #8  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 12,029

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1887 Post(s)
Liked 110 Times in 84 Posts
If the OP is talking about a der pulley bolt then they are not shoulder bolts at all but have a smooth shaft where the pulley will be located. The pulley has a sleeve/bushing that gets trapped by the bolt and the pulley freely rotates on that sleeve/bushing. The bolt could be any one of the correct length and threading and doesn't need any "shoulder" aspect to work.

Now if the OP is meaning some other bolt... we can't say much from the lacking description. The OP might be meaning the der hanger mounting bolt, which is a "shoulder" type but typically having 10x1 threads. Or the OP might be meaning the der mounting plate's (poorly called a "claw" by some) nut and bolt that keeps the plate attached to the drop out slot, these bolts could be a M5 thread but don't use a "shoulder" design. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 09-02-19, 09:51 AM
  #9  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 296

Bikes: Diamondback Wildwood Classic

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Liked 13 Times in 13 Posts
Originally Posted by Andrew R Stewart View Post
If the OP is talking about a der pulley bolt then they are not shoulder bolts at all but have a smooth shaft where the pulley will be located. The pulley has a sleeve/bushing that gets trapped by the bolt and the pulley freely rotates on that sleeve/bushing. The bolt could be any one of the correct length and threading and doesn't need any "shoulder" aspect to work.

Now if the OP is meaning some other bolt... we can't say much from the lacking description. The OP might be meaning the der hanger mounting bolt, which is a "shoulder" type but typically having 10x1 threads. Or the OP might be meaning the der mounting plate's (poorly called a "claw" by some) nut and bolt that keeps the plate attached to the drop out slot, these bolts could be a M5 thread but don't use a "shoulder" design. Andy
I presumed that since he was ordering a missing sprocket (pulley) that it was that bolt, I have several spares that I salvaged off old (bad) ders from donated bikes.
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.
JoeTBM is offline  
Old 09-02-19, 10:31 AM
  #10  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,643

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 1212 Post(s)
Likes: 0
Liked 55 Times in 50 Posts
Originally Posted by Andrew R Stewart View Post
If the OP is talking about a der pulley bolt then they are not shoulder bolts at all but have a smooth shaft where the pulley will be located. The pulley has a sleeve/bushing that gets trapped by the bolt and the pulley freely rotates on that sleeve/bushing. The bolt could be any one of the correct length and threading and doesn't need any "shoulder" aspect to work.
Yeah, I misinterpreted the design. The bolts do have a smooth, unthreaded shank but the spacing is indeed defined by the bushing.
HillRider is offline  
Old 09-02-19, 10:38 AM
  #11  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by HillRider View Post
You need the correct bolt. OEM bolts are "shoulder bolts" meaning they are threaded only part way so they screw in a specific distance and then stop thus maintaining the correct gap for the pulley to fit in. The threading is M5x0.8.
I appreciate that! It sounds like it's a bit specialized, so I will take you up on the offer.
I see the sprocket comes with two bushings that look to be different ID, so I think we're covered on that.
I'm a newbie without enough posts to PM. :-)


Thanks, Mikek
Qmavam is offline  
Old 09-02-19, 05:06 PM
  #12  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Someone sent me a PM.
I am unable to retrieve it because I don't have 10 posts, and the software won't allow me to look.
You can send me an email at lamontcranton17@yahoo.com

Thanks, Mikek
Qmavam is offline  
Old 09-03-19, 01:39 AM
  #13  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 296

Bikes: Diamondback Wildwood Classic

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Liked 13 Times in 13 Posts
Originally Posted by Qmavam View Post
Someone sent me a PM.
I am unable to retrieve it because I don't have 10 posts, and the software won't allow me to look.
You can send me an email at lamontcranton17@yahoo.com

Thanks, Mikek
It was me that sent the PM but your email can't be sent, got an "Address not found" error and I used copy|paste to retrieve it.

Try my email

JoeTheBikeManFlagler@gmail.com
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.
JoeTBM is offline  
Old 09-04-19, 07:57 AM
  #14  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Hi guys,

I have a new development, I've never seen this style Shrader? Valve. How do I put air in the tires?
Is there an adapter?
Ah! I can't post the image, I'm not up to 10 posts.

Thanks, Mikek
Qmavam is offline  
Old 09-04-19, 08:07 AM
  #15  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Hi guys,
I wanted to air the tires and found a non standard Schrader Valve.
How do I use that?
Is there an adapter?
I can't post images, but you probably know what I have, but maybe the moderator will let my link in,
but I have to get past the software, so try this.

Add that HT... and 3 W thing to the front,

dropbox.com/s/psfq39b4v181ld5/

and put this on as the last half of the link.

schrader%20valve%20not.jpg?dl=0

To see an image of the valves.
Thanks, Mikek.
Qmavam is offline  
Old 09-04-19, 08:21 AM
  #16  
Unca_Sam
The dropped
 
Unca_Sam's Avatar
 
Join Date: Oct 2018
Location: Columbus, OH
Posts: 424

Bikes: Pake C'Mute Touring/Commuter Build, 1989 Kona Cinder Cone

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 223 Post(s)
Liked 65 Times in 52 Posts
Originally Posted by Qmavam View Post
Hi guys,
I wanted to air the tires and found a non standard Schrader Valve.
How do I use that?
Is there an adapter?
I can't post images, but you probably know what I have, but maybe the moderator will let my link in,
but I have to get past the software, so try this.

Add that HT... and 3 W thing to the front,

dropbox.com/s/psfq39b4v181ld5/

and put this on as the last half of the link.

schrader%20valve%20not.jpg?dl=0

To see an image of the valves.
Thanks, Mikek.
If it's not a schrader, it's a presta valve. There are adaptors to use a car tire compressor for it, and many bicycle pumps will fit it.
Unca_Sam is offline  
Old 09-04-19, 09:41 AM
  #17  
mpetry912
experienced
 
Join Date: Jun 2009
Location: Bainbridge Island, WA
Posts: 264

Bikes: Dinucci Allez 2.0, Richard Sachs, Alex Singer, Serotta, Masi GC, Raleigh Pro Mk.1, Hetchins, etc

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 115 Post(s)
Likes: 0
Liked 57 Times in 43 Posts
Your bike shop will have a "presta valve adapter", it will cost a buck or two.

Get a couple, they do get lost.


Mark Petry
Bainbridge Island, WA USA
mpetry912 is offline  
Old 09-04-19, 10:32 AM
  #18  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks,
"It's always something"
Qmavam is offline  
Old 09-04-19, 05:37 PM
  #19  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 296

Bikes: Diamondback Wildwood Classic

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Liked 13 Times in 13 Posts
Originally Posted by Unca_Sam View Post
If it's not a schrader, it's a presta valve. There are adaptors to use a car tire compressor for it, and many bicycle pumps will fit it.


+1 Presta valve, just need an adapter Some bicycle pumps have them built into the head (reverse the fitting) or the adapter is attached to the pump lever.

https://www.ebay.com/itm/10pcs-Prest...4f39762f50bd82
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.

Last edited by JoeTBM; 09-04-19 at 05:42 PM.
JoeTBM is offline  
Old 09-15-19, 02:44 AM
  #20  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 296

Bikes: Diamondback Wildwood Classic

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Liked 13 Times in 13 Posts
Originally Posted by Qmavam View Post
Someone sent me a PM.
I am unable to retrieve it because I don't have 10 posts, and the software won't allow me to look.
You can send me an email at lamontcranton17@yahoo.com

Thanks, Mikek
Did you get the parts we mailed to you?

Did it fit?
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.
JoeTBM is offline  
Old 09-18-19, 11:57 AM
  #21  
Qmavam
Junior Member
Thread Starter
 
Join Date: Sep 2019
Posts: 8
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by JoeTBM View Post
Did you get the parts we mailed to you?

Did it fit?
Sorry Joe, I haven't attempted repair yet, I'm still waiting for a couple of other parts that needed replacement,
and I have delivered the bike to my son-in-law. I won't be able to finish until I return to their home again.
Qmavam is offline  
Old 09-27-19, 03:33 PM
  #22  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 296

Bikes: Diamondback Wildwood Classic

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Liked 13 Times in 13 Posts
@Qmavam - a big shout out to you.

You are a stand-up guy. I truly hope the part I sent you helped you and was were able to resolve the issue with the rear DER.

Thank you for the donation to my shop, it is really appreciated.

The Bike Men of Flagler County
JoeTheBikeManFlager@gmail.com
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.
JoeTBM is offline  
Likes For JoeTBM:
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
sanjeevv1
Hybrid Bicycles
4
02-23-19 12:11 PM
katyarichenkova
General Cycling Discussion
3
05-20-17 11:54 AM
rsterman
Classic & Vintage
7
10-19-16 08:12 AM
db339
Bicycle Mechanics
5
11-23-11 07:51 AM
grega
Bicycle Mechanics
2
06-16-10 05:04 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.