FAILURE Shimano Cranksets

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Frankie - B
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by Frankie - B on Fri Dec 23, 2016 9:59 pm

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.'
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antonioiglesius
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by antonioiglesius on Fri Dec 23, 2016 10:15 pm

I thought there would be screws holding the two halves together in addition to the adhesive...
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by Weenie on Fri Dec 23, 2016 10:15 pm


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goodboyr
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by goodboyr on Fri Dec 23, 2016 10:43 pm

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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hambini
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by hambini on Fri Dec 23, 2016 10:55 pm

JB Weld.
Hambini Aeronautical Engineer, Polluting YouTube since 2016 - views expressed are my own...
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toshi
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by toshi on Sat Jan 14, 2017 12:52 am

http://www.bikeradar.com/forums/viewtop ... t=13064693

https://carlinthecyclist.com/2016/09/13 ... eed-crank/

Ultegra 6800 goopy commander jank finishing
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DA 9000 clean machining
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F45
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by F45 on Sat Jan 14, 2017 2:05 pm

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 on Tue Jan 17, 2017 12:15 am

What am i supposed to say who just cracked a welded rim?
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Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)


Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
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Darceking
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by Darceking on Tue Jan 17, 2017 9:54 pm

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 on Tue Jan 17, 2017 11:33 pm

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 on Tue Jan 17, 2017 11:55 pm

Double post
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nickf
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by nickf on Sun Jan 22, 2017 11:47 pm

This just came into the shop today.

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thedonnydino
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by thedonnydino on Sun Jan 22, 2017 11:59 pm

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 on Mon Jan 23, 2017 1:01 pm

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?
Bikes:

Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)


Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
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shoemakerpom2010
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by shoemakerpom2010 on Mon Jan 23, 2017 1:17 pm

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:
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by Weenie on Mon Jan 23, 2017 1:17 pm


Visit starbike.com Online Retailer for HighEnd cycling components
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de lars cuevas
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by de lars cuevas on Mon Jan 23, 2017 1:44 pm

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.
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