My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
I'm kind of stumped on this. My LBS has a great mechanic but I should be able to solve this one myself.
The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
-- Mike "Rocket J Squirrel" Elliott 71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer) KG6RCR
Originally posted by Mike Rocket J. My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
I'm kind of stumped on this. My LBS has a great mechanic but I should be able to solve this one myself.
The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
I wonder about the chain manufacture and model. Shimano chains shift best on Shimano drive trains. That being said, height and angle are also adjustments. Check Sheldon Brown's site:
There is similar information on Park Tool site in the repair help section.
I have resorted to a "crutch" on my triple equipped bicycles, including our tandems. Tossing the chain past the granny when working up a hill/mountain/grade just isn't something I can tolerate. I have never fallen yet with my wife on board the tandem. We use a device that keeps the chain from being able to go past granny. You can see it on Sheldon Brown's site &
Once Jump Stop is installed and properly adjusted you just forget that it's there. Unless you have some unusually designed frame, you will find a way to make it fit.
-- Mike "Rocket J Squirrel" Elliott 71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer) KG6RCR
"Mike Rocket J. Squirrel Elliott" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
I'm kind of stumped on this. My LBS has a great mechanic but I should be able to solve this one myself.
The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
-- Mike "Rocket J Squirrel" Elliott 71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer) KG6RCR
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"Mike Rocket J. Squirrel Elliott" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket.
Try adjusting the limiting screw to ensure that the gap between the cage and the chain is no more than 1 mm. and yes, ask your bride to unweight the load during uphill shifts. She'll figure it out.
"Mike Rocket J. Squirrel Elliott" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
I'm kind of stumped on this. My LBS has a great mechanic but I should be able to solve this one myself.
The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
-- Mike "Rocket J Squirrel" Elliott 71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer) KG6RCR
I had a problem with my road bike where either the FD would not shift onto the small ring or it would overshoot and drop inside. I got one of these:
On Thu, 13 May 2004 16:02:00 -0700, "Mike Rocket J. Squirrel Elliott" <[email hidden]>
Quoted message said:
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
I rode with somebody tonight who had a similar problem. His chainrings are very worn and need replacing. -- Rick Onanian
"Mike Rocket J. Squirrel Elliott" <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:
My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
Hi, I recently had a similar Arte Johnson moment. I just couldn't get out of the pedals in time, after the chain dropped. This was on my DA triple, I had the same problem on a Sora double. In both cases I installed a N-Gear Jump Stop. Why take a chance, when the solution is simple. I emailed Nick on a Sunday and I received the Jump Stop on Wednesday. He will send you one with a stamped return envelope to send your $10 payment. A good product, fair price, and great service. Here is N-Gear's website: gvtc.com~ngearOpen ↗
"Mike Rocket J. Squirrel Elliott" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
I'm kind of stumped on this. My LBS has a great mechanic but I should be able to solve this one myself.
The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
I've often wondered how far from true the chainrings go under large pedalling loads (but not hard enough to ever measure anything). If it's a couple of mm it could easily cause this problem.
If that were the problem, the limit screw wouldn't prevent the chain drop, because it would be the chainring going outboard of the chain. -- Mark South Citizen of the World, Denizen of the Net <<Tiens! Ce poulet a une grenade!
"Mike Rocket J. Squirrel Elliott" <[email hidden]> wrote in message news:40A3FE68.9060400@REMOVETHEOBVIOU- SadelphiaDOT.net...
Quoted message said:
My wife's road bike has a triple on the front. 9-speed, Shimano Tiagra front derailleur.
Going up a climb this morning she shifted to the inner ring and the chain dropped -- again -- onto the bottom bracket. Poor lass did an Artie Johnson to the left. Fortunately there were no cars to run her over. She was pushing pretty hard on the pedals when she did the shift.
I'm kind of stumped on this. My LBS has a great mechanic but I should be able to solve this one myself.
The limit screw seems to be set all right -- it does not appear to be pushing the chain too far inboard. On the stand the chain doesn't even drop completely onto the granny ring, it rides on the tops of the teeth before moving a bit further inboard and seating itself.
-- Mike "Rocket J Squirrel" Elliott 71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer) KG6RCR
I had a problem with my road bike where either the FD would not shift onto the small ring or it would overshoot and drop inside. I got one of these:
