IdahoBrett
Well-Known Member
I’m unable to determine a cause for my chain attempting to change gears on the rear cogs when starting from a dead stop.
This is on my 2001 R400; triple front, 8 speed rear.
It only happens when stopped at a stop sign on a slight incline. It is where I’ve got a busy street to cross that doesn’t stop. When traffic is clear I “stand” on one pedal (Usually the left) and get about half a revolution of the crank when the chain and/or derailleur attempt to downshift. Which is about the time I’m trying to clip into the other pedal. Annoying since I’ve got a limited view of possible traffic due to a rise in the road that gives me about a 200 yard view.
It was worse when I was on the middle chain ring and the second biggest cog on the cassette. But still does it somewhat on the middle chain ring and biggest rear cog. Lately it seemed to be getting worse. I performed a chain and derailleur lube yesterday. It was better this morning. But still “binding”. On the tallest rear cog it hasn’t downshifted often, but on the second it did it frequently. Last week I lost my balance and hit the pavement.
A complex problem that I may not be able to put in words. But it’s as if the frame is flexing when I put maximum power to the pedal. When I’m applying medium effort it doesn’t do it.
This is on my 2001 R400; triple front, 8 speed rear.
It only happens when stopped at a stop sign on a slight incline. It is where I’ve got a busy street to cross that doesn’t stop. When traffic is clear I “stand” on one pedal (Usually the left) and get about half a revolution of the crank when the chain and/or derailleur attempt to downshift. Which is about the time I’m trying to clip into the other pedal. Annoying since I’ve got a limited view of possible traffic due to a rise in the road that gives me about a 200 yard view.
It was worse when I was on the middle chain ring and the second biggest cog on the cassette. But still does it somewhat on the middle chain ring and biggest rear cog. Lately it seemed to be getting worse. I performed a chain and derailleur lube yesterday. It was better this morning. But still “binding”. On the tallest rear cog it hasn’t downshifted often, but on the second it did it frequently. Last week I lost my balance and hit the pavement.
A complex problem that I may not be able to put in words. But it’s as if the frame is flexing when I put maximum power to the pedal. When I’m applying medium effort it doesn’t do it.
