Switched crankset; now front derailleur rubs on crank arm or chain
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Switched crankset; now front derailleur rubs on crank arm or chain
Don't laugh, but I switched from a standard double crankset to a compact crankset and now the front derailleur's outer plate rubs against the crank arm. If I move the derailleur inward to avoid the plate-crank rub, the plate then rubs against the chain. Rotating the derailleur clockwise (from above) helped but not totally.
I should say that the front derailleur, which came with the bike, was part of a 9-speed triple group. The latest crankset is 10-speed double.
The answer seems to be to get a 10-speed FD. I assume the cage is narrower.
Do I also need to get a 10-speed chain?
Thanks.
I should say that the front derailleur, which came with the bike, was part of a 9-speed triple group. The latest crankset is 10-speed double.
The answer seems to be to get a 10-speed FD. I assume the cage is narrower.
Do I also need to get a 10-speed chain?
Thanks.
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As I understand it, the switch from 9-speed to 10-speed would require a complete new drive train as the parts can't be mixed. You can't just swap out the crank and expect it to work well. I think you would at least need new chain, derailers, and cassette. I don't know about shifters. The front should work. The rear might work if the pull is the same, but only for 9 gears? Just guessing.
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hate to tell you this but you need a new front shifter, chain and derailleur (all double compatible)
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As I understand it, the switch from 9-speed to 10-speed would require a complete new drive train as the parts can't be mixed. You can't just swap out the crank and expect it to work well. I think you would at least need new chain, derailers, and cassette. I don't know about shifters. The front should work. The rear might work if the pull is the same, but only for 9 gears? Just guessing.
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Don't laugh, but I switched from a standard double crankset to a compact crankset and now the front derailleur's outer plate rubs against the crank arm. If I move the derailleur inward to avoid the plate-crank rub, the plate then rubs against the chain. Rotating the derailleur clockwise (from above) helped but not totally.
I should say that the front derailleur, which came with the bike, was part of a 9-speed triple group. The latest crankset is 10-speed double.
The answer seems to be to get a 10-speed FD. I assume the cage is narrower.
Do I also need to get a 10-speed chain?
Thanks.
I should say that the front derailleur, which came with the bike, was part of a 9-speed triple group. The latest crankset is 10-speed double.
The answer seems to be to get a 10-speed FD. I assume the cage is narrower.
Do I also need to get a 10-speed chain?
Thanks.
Please read and follow these instructions:
https://www.parktool.com/blog/repair-...ur-adjustments
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All the OP needs is a new chain and some know how on how to adjust things.
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You shouldn't even need a new chain depending on the crank. I have a 10 speed Campy compact double with a 9 speed chain and it works just fine. Changed from a 9 speed Campy full double and put a Wippermann 9 speed chain on when I replaced it. Everything except the crank is 9 speed and I have no problems. Just a matter of getting everything adjusted correctly.
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#14
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The OP changed his crank to a double from a triple so probably needs to change the bottom bracket spindle to adjust the chain line bya few mm and properly set up his derailleur... the 10 speed crank does not car if it runs a 9 speed chain as the inner plate measurement is the same but a rear cassette will care about it's chain and this is where you have to match things up correctly and in many cases you can run a higher numbered chain on a lower numbered cassette with no issues.
The 3 speed shifter might work well for the double although there will be positions on the shifter that will be locked out by virtue of the derailleur limit screws.
I run 8 speed chain on everything that 8 or less cogs... it actually improves the shifting on 6 and 7 speed set ups and you can use a 9 on an 8 and a ten on a nine.
10 speed chain is only narrower on the outside and has flush pins and thinner side plates and sometimes you can run a 9 speed chain on a 10 speed system as they are very close in size (6.2mm max for 10 speed) and some 9 speed chains run narrower than others.
I don't know how many times this has to be said but your derailleurs and chain rings have no speeds built in to them as this is is controlled by the shifters and the cassette which have to match.
In most cases 9-10 speed stuff plays well together just like 6-8 speed stuff plays well together except for the shifters... in some cases the new 10 speed doubles / triples have a little less clearance between their chain rings and if this was ever an issue you could run 10 speed chain or fit very thin chain ring spacers.
As always, your mileage may vary according to how well you can set up your bike or how skilled your mechanic is.
If they are working on upper end racing bike they should know what they are doing.
The 3 speed shifter might work well for the double although there will be positions on the shifter that will be locked out by virtue of the derailleur limit screws.
I run 8 speed chain on everything that 8 or less cogs... it actually improves the shifting on 6 and 7 speed set ups and you can use a 9 on an 8 and a ten on a nine.
10 speed chain is only narrower on the outside and has flush pins and thinner side plates and sometimes you can run a 9 speed chain on a 10 speed system as they are very close in size (6.2mm max for 10 speed) and some 9 speed chains run narrower than others.
I don't know how many times this has to be said but your derailleurs and chain rings have no speeds built in to them as this is is controlled by the shifters and the cassette which have to match.
In most cases 9-10 speed stuff plays well together just like 6-8 speed stuff plays well together except for the shifters... in some cases the new 10 speed doubles / triples have a little less clearance between their chain rings and if this was ever an issue you could run 10 speed chain or fit very thin chain ring spacers.
As always, your mileage may vary according to how well you can set up your bike or how skilled your mechanic is.
If they are working on upper end racing bike they should know what they are doing.
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You shouldn't even need a new chain depending on the crank. I have a 10 speed Campy compact double with a 9 speed chain and it works just fine. Changed from a 9 speed Campy full double and put a Wippermann 9 speed chain on when I replaced it. Everything except the crank is 9 speed and I have no problems. Just a matter of getting everything adjusted correctly.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
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First thing I tried before posting was adjust the limit screws and derailleur height. The problem was that when the chain is on the smallest cogs in the rear, shifting the front enough to eliminate chain rub led to crank rub. Rotating the FD to its limit clockwise didn't fully eliminate the rubbing. In the end, I had to use long-nose pliers to bend the outer plate and crimp it narrower so that the outside edge is straight front to back. Before, there was a very minor bowing outward at the rear of the outside plate, i.e. the back of the plate stuck out a little further than the front, maybe 1 or 1.5mm.
I should have also said that I didn't go straight from a triple to this compact double. I had been using a standard double without issues, but I think it was a 9-speed crankset. Also, it was a square-taper crank and the new one is ultra torque, FWIW.
I should have also said that I didn't go straight from a triple to this compact double. I had been using a standard double without issues, but I think it was a 9-speed crankset. Also, it was a square-taper crank and the new one is ultra torque, FWIW.
Last edited by AusTai; 03-30-11 at 04:51 PM. Reason: grammar