Problem with chainset slipping
#1
Senior Member
Thread Starter
Join Date: Jan 2004
Location: Wales
Posts: 50
Bikes: none at present
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Problem with chainset slipping
This doesnt happen much but when it does it achieves two things,a it annoys me badly and b, it means that my feet come off the pedals, like my testicles alot.
When i put pressure on the pedals ie going up hills every now and then it slips causing the above, what causes this and can i rectify this myself , im hoping it doesnt cost any cash as ive only just bought the bike. The chainset is a 2001/2 XT as are the shifters , freewheel, and deraileurs, didnt expect this from this standard.
When i put pressure on the pedals ie going up hills every now and then it slips causing the above, what causes this and can i rectify this myself , im hoping it doesnt cost any cash as ive only just bought the bike. The chainset is a 2001/2 XT as are the shifters , freewheel, and deraileurs, didnt expect this from this standard.
#2
Senior Member
Join Date: Oct 2003
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by dubwoy
This doesnt happen much but when it does it achieves two things,a it annoys me badly and b, it means that my feet come off the pedals, like my testicles alot.
When i put pressure on the pedals ie going up hills every now and then it slips causing the above, what causes this and can i rectify this myself , im hoping it doesnt cost any cash as ive only just bought the bike. The chainset is a 2001/2 XT as are the shifters , freewheel, and deraileurs, didnt expect this from this standard.
When i put pressure on the pedals ie going up hills every now and then it slips causing the above, what causes this and can i rectify this myself , im hoping it doesnt cost any cash as ive only just bought the bike. The chainset is a 2001/2 XT as are the shifters , freewheel, and deraileurs, didnt expect this from this standard.
#3
hello
....another possiblity is that the hub freebody is slipping internally... but let's hope that's not the case here...
George
George
#4
Sweetened with Splenda
Join Date: Sep 2003
Location: Brooklyn, Alabama
Posts: 2,335
Bikes: Too many 80s roadbikes!
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by The Fixer
....another possiblity is that the hub freebody is slipping internally... but let's hope that's not the case here...
George
George
Thanks!
-chris
#5
feros ferio
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Posts: 21,798
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
Mentioned: 44 Post(s)
Tagged: 0 Thread(s)
Quoted: 1393 Post(s)
Liked 1,325 Times
in
837 Posts
First, check the length of the chain. If 24 half-links are longer than 12-1/16", replace the chain.
Second, note whether this occurs in all cogs. If so, and if the chain is good, then your freehub ratchet may indeed be the problem.
Second, note whether this occurs in all cogs. If so, and if the chain is good, then your freehub ratchet may indeed be the problem.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
#6
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 643 Times
in
364 Posts
I think that tommy2pants has it right. Of all the possibilities, I think that a skipping freehub body is the least likely.
BY FAR the most likely is a poorly adjusted derailleur. Try this first:
1. Figure out a way to hang your bike so that the rear wheel is off the ground and you can turn the crank with your hand.
2. Shift into your smallest cog in back.
3. Now move your shifter just one click and turn the crank. If the chain doesn't make a lot of chattering noise and immediately jumps up just one cog, that's good. If it chatters a lot or doesn't shift, turn the barrel adjuster where the cable enters the derailleur 1/2 turn counterclockwise.
4. Repeat "3" for the rest of the gears.
5. Now try to go the other way. If it shifts slowly, of not at all the other way, chances are you have a gunked up derailleur housing.
Hope that fixes it. The other stuff is harder to figure out and costs more to fix.
BY FAR the most likely is a poorly adjusted derailleur. Try this first:
1. Figure out a way to hang your bike so that the rear wheel is off the ground and you can turn the crank with your hand.
2. Shift into your smallest cog in back.
3. Now move your shifter just one click and turn the crank. If the chain doesn't make a lot of chattering noise and immediately jumps up just one cog, that's good. If it chatters a lot or doesn't shift, turn the barrel adjuster where the cable enters the derailleur 1/2 turn counterclockwise.
4. Repeat "3" for the rest of the gears.
5. Now try to go the other way. If it shifts slowly, of not at all the other way, chances are you have a gunked up derailleur housing.
Hope that fixes it. The other stuff is harder to figure out and costs more to fix.
#7
Senior Member
Join Date: Jan 2004
Location: Madison, WI USA
Posts: 6,154
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 2363 Post(s)
Liked 1,749 Times
in
1,191 Posts
Originally Posted by brokenrobot
I think I'm having this problem... Is there an easy way to tell whether the freehub (or, 9in my case, freewheel) is slipping internally vs one of the other potential causes that have been suggested?
This happened to me several weeks ago when the weather was much colder. A pawl would eventually engage, but there would be a "delay", that is, I'd spin the crank about a half turn before it would kick in. Once engaged, it would stay engaged. But if I coasted, then started pedaling again, I'd get that same phenomenon.
Sometimes you can quick-fix this by shooting spray lube into the freewheel or freehub body. Lay it sideways, and spray between the ring/part that remains stationary and the ring/part that spins as the mechanism "ratchets". They're not that tightly sealed, so some of the lube will probably get in there, and might just free it up. Otherwise, you'll have to disassemble the freewheel/freehub, which isn't brain surgery, but isn't trivial either. Usually it requires a special tool such as a pin spanner.
#8
Sweetened with Splenda
Join Date: Sep 2003
Location: Brooklyn, Alabama
Posts: 2,335
Bikes: Too many 80s roadbikes!
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I wound up replacing the freewheel, and all is well. FWIW, the bike was involved in an auto accident a week ago, and I suspect that the impact did something bad inside the freewheel - might explain why I was having a problem that is apparently normal a few thousand miles from now