That was Close!
07-18-13, 10:37 PM
#1
Senior Member
Thread Starter
Join Date: May 2007
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
That was Close!
I ordered a new wheelset from the LBS and eagerly went home to swap the cassette from the old wheel to the new one. I opened the quick release on the rear wheel and popped it off, but as the wheel dropped out the whole rear derailleur came off with it! Upon closer inspection i discovered that the chainring bolt that holds the derailleur on the hanger was gone. Im really glad the derailleur didn't fall off while riding! I will be checking that bolt from now on.
On a related note does anyone know (or know how to find out) what size chainring nut i need to reattach the derailleur to the hanger? When i put the new bolt on should i use loctite?
On a related note does anyone know (or know how to find out) what size chainring nut i need to reattach the derailleur to the hanger? When i put the new bolt on should i use loctite?
07-18-13, 11:03 PM
#2
Senior Member
Sounds like you need to make another trip to your LBS. They will have the correct size bolt and will know how to attach it properly.
07-19-13, 12:31 AM
#3
Zoom zoom zoom zoom bonk
Join Date: Sep 2006
Location: New Zealand
Posts: 4,624
Bikes: Giant Defy, Trek 1.7c, BMC GF02, Fuji Tahoe, Scott Sub 35, Kona Rove, Trek Verve+2
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 551 Post(s)
Liked 722 Times
in
366 Posts
Chainring bolts go near the middle of the bike not the end. Go see you LBS.
07-19-13, 12:40 AM
#4
Still can't climb
Join Date: Sep 2006
Location: Limey in Taiwan
Posts: 23,024
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 6 Times
in
6 Posts
chainring on rear derailleur? what am i missing.
__________________
coasting, few quotes are worthy of him, and of those, even fewer printable in a family forum......quote 3alarmer
No @coasting, you should stay 100% as you are right now, don't change a thing....quote Heathpack
coasting, few quotes are worthy of him, and of those, even fewer printable in a family forum......quote 3alarmer
No @coasting, you should stay 100% as you are right now, don't change a thing....quote Heathpack
07-19-13, 02:42 AM
#7
Senior Member
Join Date: Apr 2013
Location: Charles Town, WV
Posts: 348
Bikes: Shogun 400 ('83), Kuwahara Newport
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Use JB Weld and tighten it til you hear a creaking like something's about to break.
07-19-13, 06:14 AM
#8
Senior Member
Thread Starter
Join Date: May 2007
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Wow that went downhill real quick to attacking my competency. Im pretty sure the bolt/nut whatever you want to call it that attaches the rear derailleur hanger to the bike frame is called a chainring nut.
Or am i mistaken?
Or am i mistaken?
07-19-13, 06:45 AM
#11
Senior Member
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Posts: 5,773
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 453 Post(s)
Liked 104 Times
in
87 Posts
Your correct, in that the bolt is the same type as used for chainrings; the confusion could come that you described it as bolt for the derailleur, which it isn't; it bolts on the replaceable hanger, which the derailleur mounts (bolts) onto. The derailleur bolt (which mount to the hanger/frame) has a retaining c-clip to prevent loss.
07-19-13, 06:54 AM
#12
Artificial Member
Join Date: Jan 2010
Location: Cyberspace
Posts: 7,158
Bikes: Retrospec Judd, Dahon Boardwalk, Specialized Langster
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 6766 Post(s)
Liked 5,479 Times
in
3,223 Posts
It is correctly referred to as a "baby bike bolt".
They are sometimes stollen.
They are sometimes stollen.
__________________
07-19-13, 06:56 AM
#13
Senior Member
Join Date: May 2011
Location: Brookings, SD
Posts: 283
Bikes: Felt Z85
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
haha threads like this are the reason a person I work with doesn't come to these forums anymore... don't take it personally, OP and have a thick skin and laugh it off. Sarcasm and subtle jabs are the hallmark of the INTJ personality type.
07-19-13, 07:25 AM
#15
Senior Member
Join Date: Nov 2003
Location: SE Minnesota
Posts: 12,275
Bikes: are better than yours.
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
That looks like a threaded insert to me. Sometimes those are used to replace stripped threads, sometimes they are installed in materials that don't support tapped threads. From your picture, it looks more like the former to me. The insert may have come out because it was installed by the same person who stripped the threads in the first place.
__________________
Telemachus has, indeed, sneezed.
Telemachus has, indeed, sneezed.
07-19-13, 07:32 AM
#16
Senior Member
Thread Starter
Join Date: May 2007
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
I dont think its a threaded insert that same nut/bolt whatever it is, is the same one on both of my bike frames. The bolt on the bike that fell out was installed by the bike manufacturer.
Ill ask the LBS and see if we can get it figured out.
i just want to get back on the road!
Ill ask the LBS and see if we can get it figured out.
i just want to get back on the road!
07-19-13, 08:23 AM
#17
Senior Member
Join Date: Oct 2008
Location: Northern NY...Brownville
Posts: 2,571
Bikes: Specialized Aethos, Specialized Diverge Comp E5
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 241 Post(s)
Liked 454 Times
in
265 Posts
From the way the attachment hold barely overlaps the axle marks it sure looks like the threads on the drop out had been stripped at some point and a chain ring bolt used in its' place...actually quite clever.
I don't remember ever seeing that method of holding a derailleur as standard on any frame...typically it was just a threaded area of the drop out and they could become stripped.
Reinstall the bolt, use some loctite and check periodically.
I don't remember ever seeing that method of holding a derailleur as standard on any frame...typically it was just a threaded area of the drop out and they could become stripped.
Reinstall the bolt, use some loctite and check periodically.
07-19-13, 08:51 AM
#18
Speechless
Join Date: Jun 2011
Location: Central NY
Posts: 8,842
Bikes: Felt Brougham, Lotus Prestige, Cinelli Xperience,
Mentioned: 22 Post(s)
Tagged: 1 Thread(s)
Quoted: 163 Post(s)
Likes: 0
Liked 39 Times
in
16 Posts
That is not a fix for stripped threads, it is a pretty standard means of holding the derailleur hanger to the frame. Going from memory, they are a size larger than a chainring bolt, and much shorter. If you can't find one, I believe they come supplied with all of the Nashbar standard derailleur hangers, for like $6.
07-19-13, 09:12 AM
#19
Senior Member
Join Date: Aug 2009
Posts: 8,550
Bikes: Wilier Izoard XP (Record);Cinelli Xperience (Force);Specialized Allez (Rival);Bianchi Via Nirone 7 (Centaur); Colnago AC-R Disc;Colnago V1r Limited Edition;De Rosa King 3 Limited(Force 22);DeRosa Merak(Red):Pinarello Dogma 65.1 Hydro(Di2)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 551 Post(s)
Liked 277 Times
in
145 Posts
I thought the assembly that held the RD to the dropout was called a bracket spindle and the bolt that looks like a chainring bolt was called a hanger bolt???. At least as it is referred to in the Shimano manuals...Campagnolo just calls it "Screw A". Plus, that's also an odd place to hang an RD. How old is the bike?
07-19-13, 12:07 PM
#21
Super Moderator
Join Date: Jul 2004
Location: Ffld Cnty Connecticut
Posts: 21,843
Bikes: Old Steelies I made, Old Cannondales
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1173 Post(s)
Liked 927 Times
in
612 Posts
If so, doesnt the QR skewer get in the way ?
__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
07-19-13, 12:43 PM
#22
Senior Member
Thread Starter
Join Date: May 2007
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Here it is from the front:
The entire derailleur hanger is what fell off the bike, apparently the front side of the hanger bolt (whatever it is) worked itself lose. This is the same type of bolt that is on my 2012 Kestrel derailleur hanger also
The entire derailleur hanger is what fell off the bike, apparently the front side of the hanger bolt (whatever it is) worked itself lose. This is the same type of bolt that is on my 2012 Kestrel derailleur hanger also
07-19-13, 12:44 PM
#23
Senior Member
Join Date: Aug 2009
Posts: 8,550
Bikes: Wilier Izoard XP (Record);Cinelli Xperience (Force);Specialized Allez (Rival);Bianchi Via Nirone 7 (Centaur); Colnago AC-R Disc;Colnago V1r Limited Edition;De Rosa King 3 Limited(Force 22);DeRosa Merak(Red):Pinarello Dogma 65.1 Hydro(Di2)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 551 Post(s)
Liked 277 Times
in
145 Posts
Then that is definitely a weird place to hang an RD. Can you take a picture with the whole dropout in view? (wow, you read my mind)
Yup, you need a derailleur hanger bolt. And probably a Bianchi breakaway derailleur hanger #49 . The set should come with its own retaining bolt.
Yup, you need a derailleur hanger bolt. And probably a Bianchi breakaway derailleur hanger #49 . The set should come with its own retaining bolt.
Last edited by tagaproject6; 07-19-13 at 12:58 PM.
