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You serious Clark?
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19 Posts
Discussion Starter · #1 ·
Hello, I have been riding my 06 Prophet and the front crank is driving me nuts.
Any torque on up shifts result in popping,chain derailing or other aggravating circumstances. :madmax: Deore xt 22/32/42
I have adjusted front dr and again, and again. It works OK for a while and then undependable again. (been like that since it was new):madman:
After a little research I have seen the chain rings bending.
Not just the outside from collision, but the middle and the inner.
I am a Clydesdale and can put some major torque on the drive train.
If there is a good fix for this I would love to know.

If there isnt a good fix I would like to change crank setup all together. Does anyone know if my bike will house the hammerschmidt?
I would like a troublefree ride and focus on loosing weight and having fun, not
working on the bike.

Oh yeah, I have a 9 speed cassette. Will it work with a hammerschmidt too?


Thanks a bunch. Clint
 

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Old man on a bike
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12,395 Posts
Why are you applying torque while shifting? That's just asking for problems, which you've got now as a result. Ease up when you shift, and shift earlier than later.

If your frame has ISCG mounts then it's a candidate for a HammerSchmidt
 

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Registered
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10,039 Posts
Also, you haven't actually bent a ring yet, right? There are problem stories on the internet for just about every bad or great part. I wouldn't get too worried about a problem that hasn't happened yet

How old is your chainring? Have you measured your chain for stretch? Either one of those can cause the exact problems you are describing, especially if you applying torque while shifting
 

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Bicyclochondriac.
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14,928 Posts
boomn said:
How old is your chainring? Have you measured your chain for stretch? Either one of those can cause the exact problems you are describing, especially if you applying torque while shifting
Yeah, if this setup is 3 years old, then wear could play a big roll in the problems stated.

EDIT: To the OP, cranks usually have little to do with it. It's the chainrings that affect the shifting, for the most part. Those are relatively cheap to replace.
 

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It's about showing up.
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12,738 Posts
Sounds plumb wore out.

Sometimes a new chain on to an older drivetrain will expose problems. Once the rings start to moon they skip. Skipping under load leads to bending. Once you change the cranks or rings you may find that your rear cassette starts skipping, too. I wouldn't blame the XT design.
 
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