Bike now Broken?
10-23-23, 09:56 AM
#1
Newbie
Thread Starter
Bike now Broken?
Hello everybody,
today was my first day at work after 2 weeks of vacation. I normaly droved to work and back. But I needed to go back in the afternoon. At the way to work everything worked fine, but at the way home, I couldn't switch gears and the chain have a really low tension. So I looked at my bike (Triban Grvl 120) and saw this (look at pictures). Now my Question is, if that is broken or is the problem elsewhere?
today was my first day at work after 2 weeks of vacation. I normaly droved to work and back. But I needed to go back in the afternoon. At the way to work everything worked fine, but at the way home, I couldn't switch gears and the chain have a really low tension. So I looked at my bike (Triban Grvl 120) and saw this (look at pictures). Now my Question is, if that is broken or is the problem elsewhere?
10-23-23, 10:06 AM
#2
Full Member
Join Date: Mar 2013
Location: Albany, NY
Posts: 413
Bikes: Trek FX 7.3, Specialized Roubaix, Orbea Terra, Aostimotor S17 ebike, Huffy RedRock (first bike)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 199 Post(s)
Liked 266 Times
in
133 Posts
maybe just a derailleur, not the bike.
10-23-23, 10:09 AM
#3
Newbie
Thread Starter
10-23-23, 10:12 AM
#4
Senior Member
Join Date: Oct 2013
Location: Mich
Posts: 7,395
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,979 Times
in
1,920 Posts
der went derp. time to figure why it derp derp'd.
__________________
-Oh Hey!
-Oh Hey!
10-23-23, 10:31 AM
#7
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,516
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 2747 Post(s)
Liked 3,401 Times
in
2,058 Posts
Looks like possibly this spring broke releasing tension on the "B" screw.
https://www.parktool.com/en-us/blog/...lleur-overhaul
https://www.parktool.com/en-us/blog/...lleur-overhaul
Likes For dedhed:
10-23-23, 10:44 AM
#8
Newbie
Thread Starter
10-23-23, 10:50 AM
#9
Newbie
Thread Starter
10-23-23, 11:05 AM
#10
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 14,992
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 6196 Post(s)
Liked 4,810 Times
in
3,318 Posts
What are you doing or what gear combo are you in when you get the loose chain? Is it only when in the small rear cogs and small front, of does it happen in the larger tooth combinations.
10-23-23, 11:06 AM
#11
Senior Member
Join Date: Oct 2014
Location: Portland, OR
Posts: 12,906
Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder
Mentioned: 129 Post(s)
Tagged: 0 Thread(s)
Quoted: 4806 Post(s)
Liked 3,932 Times
in
2,557 Posts
In the top photo of your second batch, looks like the derailleur mounting bolt (just below the hub axle) is angled down. This almost always means the derailleur hanger is bent or broken. On virtually all modern bikes, that hanger is a replaceable part. I'd take the bike to a shop that carries the brand or call their US office. (Many other shops should be able to help you through their suppliers if the shop has the person with the computer savvy and desire to help.)
10-23-23, 11:25 AM
#12
climber has-been
Join Date: Dec 2004
Location: Palo Alto, CA
Posts: 7,111
Bikes: Scott Addict R1, Felt Z1
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 3432 Post(s)
Liked 3,567 Times
in
1,793 Posts
Looks like possibly this spring broke releasing tension on the "B" screw.
https://www.parktool.com/en-us/blog/...lleur-overhaul
https://www.parktool.com/en-us/blog/...lleur-overhaul
__________________
Ride, Rest, Repeat. ROUVY: terrymorse
Ride, Rest, Repeat. ROUVY: terrymorse
10-23-23, 11:27 AM
#13
Senior Member
Join Date: Apr 2010
Location: Elevation 666m Edmonton Canada
Posts: 2,483
Bikes: 2013 Custom SA5w / Rohloff Tourster
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1237 Post(s)
Liked 322 Times
in
249 Posts
Looks like you crashed on that side. Scuff marks and the hanger looks bent.
Why is the top bolt so far out?
Why is the top bolt so far out?
10-23-23, 11:32 AM
#14
Newbie
Thread Starter
10-23-23, 11:33 AM
#15
Newbie
Thread Starter
10-23-23, 11:39 AM
#16
Full Member
Join Date: Mar 2013
Location: Albany, NY
Posts: 413
Bikes: Trek FX 7.3, Specialized Roubaix, Orbea Terra, Aostimotor S17 ebike, Huffy RedRock (first bike)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 199 Post(s)
Liked 266 Times
in
133 Posts
Move derailleur back and see if you can get the set screw catch on top of the hanger. Screw looks stripped to me, and may need replacement. Take a look at that first.
10-23-23, 12:35 PM
#17
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,516
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 2747 Post(s)
Liked 3,401 Times
in
2,058 Posts
Something doesn't look right here
Likes For dedhed:
10-23-23, 01:30 PM
#18
Sunshine
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 16,614
Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo
Mentioned: 123 Post(s)
Tagged: 0 Thread(s)
Quoted: 10965 Post(s)
Liked 7,491 Times
in
4,189 Posts
10-23-23, 02:38 PM
#19
Full Member
Join Date: Mar 2013
Location: Albany, NY
Posts: 413
Bikes: Trek FX 7.3, Specialized Roubaix, Orbea Terra, Aostimotor S17 ebike, Huffy RedRock (first bike)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 199 Post(s)
Liked 266 Times
in
133 Posts
Does shifter loosens or tightens the cable? I think regardless if hanger is bent, derailleur would still move up or down gear.
10-23-23, 03:04 PM
#20
Junior Member
It looks like the B-screw was forced to overshoot where it's supposed to rest on, so there's no way it's doing its job.
The upper derailleur pulley looks to be right up against the cogs.
The upper derailleur pulley looks to be right up against the cogs.
Likes For Paul_P:
10-23-23, 03:13 PM
#21
Senior Member
Join Date: Sep 2020
Location: Scotland
Posts: 503
Bikes: Way too many
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 900 Post(s)
Liked 607 Times
in
364 Posts
The lock/unlock symbol indicates that the clutch is disengaged, which means the chain won't be as tight. That shouldn't have any impact on the shifting though.
Likes For wheelreason:
10-23-23, 06:58 PM
#25
Senior Member
Join Date: Apr 2010
Location: Elevation 666m Edmonton Canada
Posts: 2,483
Bikes: 2013 Custom SA5w / Rohloff Tourster
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1237 Post(s)
Liked 322 Times
in
249 Posts
Isn't there a pivot bolt missing in the pic saying >not centered<??