Bike keeps jumping gears
04-18-14, 08:15 PM
#1
Full Member
Thread Starter
Bike keeps jumping gears
I recently bought my bike into my LBS to get it tuned up. I had snapped my chain so I just decided to get a full tune up along with the new chain. When I picked it up the bike it would constantly jump gears when I'm in the larger sprockets on climbs. It's so bad I've actually had to get off and walk the bike on some hills. In the small sprockets on flats it's perfectly fine.
The only clue I have is that I may need a new cassette. Any suggestions? Shifters and rear derailleur are SRAM Force (I believe 2009 edition) and cassette is SRAM Red. I bought the bike used so I'm not sure of mileage.
The only clue I have is that I may need a new cassette. Any suggestions? Shifters and rear derailleur are SRAM Force (I believe 2009 edition) and cassette is SRAM Red. I bought the bike used so I'm not sure of mileage.
04-18-14, 08:17 PM
#2
Senior Member
Join Date: Jun 2008
Location: Northern VA
Posts: 3,247
Bikes: Moots Vamoots, Colnago C60, Santa Cruz Stigmata CC, and too many other bikes I don't ride
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 152 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
In order of likelihood:
Bent derailleur hanger?
Limiter screw?
Cable tension?
Bent derailleur hanger?
Limiter screw?
Cable tension?
04-18-14, 08:22 PM
#3
Full Member
Thread Starter
I bought the bike back the the store and they suggested cable tension. They tightened the cable tension and it made not one iota of difference. Not sure about other issues, I'll take a picture when I get home tonight.
04-18-14, 08:27 PM
#4
Senior Member
It could be many things. But my commuter bike does this when using a SRAM chain. Switch to Shimano and no issues. But in your case, I would bet that you may also need a new cassette and potentially a new RD hanger.
04-18-14, 08:32 PM
#5
Senior Member
Was going to say, jumping gears for me was a chain issue. The 105 Shimano chain has no issues now that it's installed properly. Just check over your chain to make sure each link is solid, that it isn't wider somewhere, coming apart etc.
04-18-14, 08:35 PM
#6
Full Member
Thread Starter
OK. I have no idea what chain the local bike store put on, nor do I now how to install a chain. Looks like I'll be heading back there tomorrow
04-18-14, 08:40 PM
#7
Senior Member
Join Date: Jun 2008
Location: Northern VA
Posts: 3,247
Bikes: Moots Vamoots, Colnago C60, Santa Cruz Stigmata CC, and too many other bikes I don't ride
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 152 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
The LBS should be able to check the derailleur hanger very easily. If it's bent, they can also adjust it very easily.
Do NOT change chain or cassette before you check the derailleur hanger first.
Do NOT change chain or cassette before you check the derailleur hanger first.
04-18-14, 08:42 PM
#9
Administrator
Join Date: Apr 2005
Location: Hudson Valley, NY
Posts: 33,001
Bikes: Merlin Cyrene '04; Bridgestone RB-1 '92
Mentioned: 325 Post(s)
Tagged: 2 Thread(s)
Quoted: 11969 Post(s)
Liked 6,646 Times
in
3,483 Posts
OP have you met Pcad? He's a big Mets fan.
__________________
See, this is why we can't have nice things. - - smarkinson
Where else but the internet can a bunch of cyclists go and be the tough guy? - - jdon
04-18-14, 08:42 PM
#10
Senior Member
Join Date: Jun 2008
Location: Northern VA
Posts: 3,247
Bikes: Moots Vamoots, Colnago C60, Santa Cruz Stigmata CC, and too many other bikes I don't ride
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 152 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
Oh, another thing to check: make sure your wheel is properly seated when the quick release is locked.
04-18-14, 08:43 PM
#11
Fixie Infamous
Join Date: Dec 2011
Location: SF
Posts: 10,474
Bikes: 2007 CAAD Optimo Track, 2012 Cannondale CAAD10, 1996 GT Force restomod, 2015 Cannondale CAADX
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
Likes: 0
Liked 4 Times
in
4 Posts
Sounds like you need a new shop.
04-18-14, 08:50 PM
#12
Senior Member
Join Date: May 2008
Location: Zang's Spur, CO
Posts: 9,083
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 3375 Post(s)
Liked 5,514 Times
in
2,857 Posts
Any time you have a bike working properly, then put a new chain on and it starts jumping, it is positively a worn out cassette.
04-18-14, 10:04 PM
#13
SuperGimp
04-18-14, 10:54 PM
#16
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
your shop sucks. drop them like a hot potato.
how can they tune up a bike and not see that it is operating ok? i can twiddle a knob here, pull a lever there, twist a few screws randomly. thy are supposed to do it purposefully not randomly.
how can they tune up a bike and not see that it is operating ok? i can twiddle a knob here, pull a lever there, twist a few screws randomly. thy are supposed to do it purposefully not randomly.
__________________
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
04-18-14, 11:49 PM
#17
Full Member
Thread Starter
That's not even the half of it. They didn't complete the tune up the date they stated they would, and when I picked the bike up the back wheel seized on me and I had to call a cab to get home.
04-19-14, 03:08 AM
#18
Full Member
Thread Starter
SRAM OG-1090 10-speed Cassette-Black - Normal Shipping Ground
So, onto the new cassette...
Guessing this will be fine with 2009 Force?
So, onto the new cassette...
Guessing this will be fine with 2009 Force?
04-19-14, 06:23 AM
#19
Administrator
Join Date: Apr 2005
Location: Hudson Valley, NY
Posts: 33,001
Bikes: Merlin Cyrene '04; Bridgestone RB-1 '92
Mentioned: 325 Post(s)
Tagged: 2 Thread(s)
Quoted: 11969 Post(s)
Liked 6,646 Times
in
3,483 Posts
You definitely have to find a new shop.
__________________
See, this is why we can't have nice things. - - smarkinson
Where else but the internet can a bunch of cyclists go and be the tough guy? - - jdon
04-19-14, 10:31 AM
#20
Senior Member
SRAM OG-1090 10-speed Cassette-Black - Normal Shipping Ground
So, onto the new cassette...
Guessing this will be fine with 2009 Force?
So, onto the new cassette...
Guessing this will be fine with 2009 Force?
04-19-14, 10:37 AM
#21
Senior Member
04-19-14, 10:44 AM
#22
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 5,478 Times
in
3,223 Posts
04-19-14, 11:42 AM
#24
Full Member
Thread Starter
Thread
Thread Starter
Forum
Replies
Last Post
angrychicken
Bicycle Mechanics
8
10-04-11 06:22 PM
