FAILURE Shimano Cranksets

[Frankie - B]

I've seen it with a ultegra crank as well.

[antonioiglesius]

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

[goodboyr]

It's just cosmetic.

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

Duct tape.....

Must be something in glue/bonding method susceptible to failure in wet and hot conditions

Sent from my SM-G900W8 using Tapatalk

[hambini]

JB Weld.

[toshi]

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

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

Ultegra 6800 goopy commander jank finishing


DA 9000 clean machining

[F45]

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

[wheelsONfire]

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

[Darceking]

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

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

[nickf]

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

[nickf]

Double post

[nickf]

This just came into the shop today.

[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.

[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?

[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....

[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.