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Re: FAILURE Shimano Cranksets

Posted: Fri Dec 23, 2016 9:59 pm
by Frankie - B
I've seen it with a ultegra crank as well.

Re: FAILURE Shimano Cranksets

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

Re: FAILURE Shimano Cranksets

Posted: Fri Dec 23, 2016 10:15 pm
by Weenie

Re: RE: Re: FAILURE Shimano Cranksets

Posted: Fri Dec 23, 2016 10:43 pm
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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Re: FAILURE Shimano Cranksets

Posted: Fri Dec 23, 2016 10:55 pm
by hambini
JB Weld.

Re: FAILURE Shimano Cranksets

Posted: Sat Jan 14, 2017 12:52 am
by toshi

Re: FAILURE Shimano Cranksets

Posted: Sat Jan 14, 2017 2:05 pm
by F45
Ah, so that explains why the 11 speed groups are so inexpensive. Instead of welding, they glued their cranks together.

Re: FAILURE Shimano Cranksets

Posted: Tue Jan 17, 2017 12:15 am
by wheelsONfire
What am i supposed to say who just cracked a welded rim?

Re: FAILURE Shimano Cranksets

Posted: Tue Jan 17, 2017 9:54 pm
by Darceking
This happened to my DA9000 Crankset. And no, it had nothing to do with the Pioneer

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

Re: FAILURE Shimano Cranksets

Posted: Tue Jan 17, 2017 11:33 pm
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.

Re: FAILURE Shimano Cranksets

Posted: Tue Jan 17, 2017 11:55 pm
by nickf
Double post

Re: FAILURE Shimano Cranksets

Posted: Sun Jan 22, 2017 11:47 pm
by nickf
This just came into the shop today.

Image

Re: FAILURE Shimano Cranksets

Posted: Sun Jan 22, 2017 11:59 pm
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.

Re: FAILURE Shimano Cranksets

Posted: Mon Jan 23, 2017 1:01 pm
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?

Re: FAILURE Shimano Cranksets

Posted: Mon Jan 23, 2017 1:17 pm
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:

Re: FAILURE Shimano Cranksets

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

Re: FAILURE Shimano Cranksets

Posted: Mon Jan 23, 2017 1:44 pm
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.