FAILURE Shimano Cranksets

Discuss light weight issues concerning road bikes & parts.
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Frankie - B
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by Frankie - B

I've seen it with a ultegra crank as well.
'Tape was made to wrap your GF's gifts, NOT hold a freakin tire on.'

antonioiglesius
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by antonioiglesius

I thought there would be screws holding the two halves together in addition to the adhesive...

by Weenie


goodboyr
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by goodboyr

dynaserve wrote:
Calnago wrote:It's just cosmetic.

Bit more than cosmetic, but luckily the failure mode is ideal to simply Loctite it back in place.

Duct tape.....
victorduraace wrote:Must be something in glue/bonding method susceptible to failure in wet and hot conditions



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toshi
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by toshi


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F45
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by F45

Ah, so that explains why the 11 speed groups are so inexpensive. Instead of welding, they glued their cranks together.

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wheelsONfire
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by wheelsONfire

What am i supposed to say who just cracked a welded rim?
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Darceking
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by Darceking

This happened to my DA9000 Crankset. And no, it had nothing to do with the Pioneer

https://instagram.com/p/BEWuJjnLPnz/

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nickf
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by nickf

My buddies ultegra crank did this just a couple months ago. Didn't fully choke apart but was just about to let loose.

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nickf
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by nickf

Double post

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nickf
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by nickf

This just came into the shop today.

Image

thedonnydino
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by thedonnydino

I had a duraace 9000 crankset fail. No power meter.

Seems like the epoxy that holds the crank together.

Took off from the light, heard a crack, and noticed a whole lot of flex through the crank.

It didn't separate completely though, but I imagine had I put some power through it at the time it would have.

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wheelsONfire
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by wheelsONfire

It seems this is due to corrosion, humidity and salt?
Perhaps in conjunction with a twisting load when we pedal it work itself off or in some cases crack?

So Shimano Hollow Technology is bascially a U-profile with a reversed U-profile glued on?
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shoemakerpom2010
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by shoemakerpom2010

Interesting you say failure due to salt.... I had a highend mtn bike bullseye rimset hand built and they lasted 15 years with zero problems until I moved to Florida... After that the flange on the rear hub cracked and failed....After which I come to find out that Bullseye had a small clause about salt weather on the hubs and failure if they were exposed too long in such climates.... :noidea:

de lars cuevas
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Location: the Netherlands

by de lars cuevas

Hi there,

Hollowtech is a hollow forged crank.
Hollowbond is a crank made of two hollow shells bonded together.

DA9000, DA9100, Ul6800 and XTRM9000Race are Hollowbond, all other cranks are, to my knowledge, Hollowtech.

by Weenie


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