Broken crankset spindle = man down

paul2718

It would be interesting to know what the frame/bottom bracket spec was. Because that looks like a press fit, but not a Shimano press fit, possibly with an adaptor. If the installation was allowing the spindle to bend then that might start to explain the sequence of events.

Paul

jgsi

The bottom bracket was the standard Hollowtech then?

dazz_ni45

The BB was a Rotor 4224 (BB30/24mm adapter).

That is my only concern that Shimano will blame the fact it was installed and that it isn't a shimano BB, but we will see. I would rather know one way or the other what has caused it.

meanredspider

I don't think Shimano can have a valid argument against another brand of BB without a good rationale. They are, after all, component manufacturers and, as such, their parts should be designed to fit a range of installations. They might show that there is a serious fault with the BB or its installation but one would hope that their was enough safety margin in their crank design to overcome minor issues.

svetty

I assume the bearing hasn't seized?

Alex99

This is scary stuff that you really don't want to think about. There have been a few examples of the 6800 chainset coming un-glued and breaking (or is it breaking then coming un-glued?). It was somewhere on this forum I think. The 6800 is glued together in two halves, the 5800, just forged. I had a 5750 which had a steel axle and I think the 5800 might have too FWIW.

paul2718

dazz_ni45 wrote:

The BB was a Rotor 4224 (BB30/24mm adapter).

That is my only concern that Shimano will blame the fact it was installed and that it isn't a shimano BB, but we will see. I would rather know one way or the other what has caused it.

I've no idea what attitude Shimano will have, but I hope they are open minded and produce a comprehensive report.

It would be interesting to know, as a user of a Shimano crank in a Shimano BB and a Rotor crank also in a Shimano BB.

Did the left crank and BB bearing separate from the bike when it failed?

Paul

dazz_ni45

paul2718 wrote:

dazz_ni45 wrote:

The BB was a Rotor 4224 (BB30/24mm adapter).

That is my only concern that Shimano will blame the fact it was installed and that it isn't a shimano BB, but we will see. I would rather know one way or the other what has caused it.

I've no idea what attitude Shimano will have, but I hope they are open minded and produce a comprehensive report.

It would be interesting to know, as a user of a Shimano crank in a Shimano BB and a Rotor crank also in a Shimano BB.

Did the left crank and BB bearing separate from the bike when it failed?

Paul

Yes, I had just stood up for a sprint internal up a small include and the next thing I remember is impacting with the ground as the left crank had come away from the bike. Once I had recovered I assume the crank had simply come off the spindle as the same had happened a club mate a few months back, but I was surprised when I saw part of the spindle still attached to the crank that had come off and with the bearings also attached.

dinyull

laurentian wrote:

I'm sure there was a thread on here a few months ago referring to this specific problem with Ultegra

I'm sure it's the 3rd time I've seen this type of failure reported with Ultegra....hope Tiagra doesn't have the same problem!

Scary, as someone who rides mostly alone - have this kind of problem at the foot of a blind summit and it doesn't bare thinking about.

Alex99

Dinyull wrote:

laurentian wrote:

I'm sure there was a thread on here a few months ago referring to this specific problem with Ultegra

I'm sure it's the 3rd time I've seen this type of failure reported with Ultegra....hope Tiagra doesn't have the same problem!

Scary, as someone who rides mostly alone - have this kind of problem at the foot of a blind summit and it doesn't bare thinking about.

Pinch a few grams over Tiagra/105 by having a thin alloy axle and glued together hollow crank arms :shock: ... Cranks have a few fairly well known failure modes anyway (cracking at the spider adjacent to the crank arm, and at the pedal hole) but, introducing two new ones. Gulp.

keef66

I'm going to take a magnet to my HT2 spindles out of curiosity (5600 and 4500)

dazz_ni45

Dinyull wrote:

laurentian wrote:

I'm sure there was a thread on here a few months ago referring to this specific problem with Ultegra

I'm sure it's the 3rd time I've seen this type of failure reported with Ultegra....hope Tiagra doesn't have the same problem!

Scary, as someone who rides mostly alone - have this kind of problem at the foot of a blind summit and it doesn't bare thinking about.

Thankfully I'd nothing broken and was able to walk as I was on a road that only ever sees sheep or farmers trying to find their sheep. I had no mobile reception and had to walk for about 2.5 miles to the nearest house to call for help.

bendertherobot

I keep meaning to ask, given what normally happens, are your bowlarks ok?

dazz_ni45

bendertherobot wrote:

I keep meaning to ask, given what normally happens, are your bowlarks ok?

Bowlarks?

meanredspider

dazz_ni45 wrote:

bendertherobot wrote:

I keep meaning to ask, given what normally happens, are your bowlarks ok?

Bowlarks?

Testicles.

I have to say that I darent even think about that

bendertherobot

dazz_ni45 wrote:

bendertherobot wrote:

I keep meaning to ask, given what normally happens, are your bowlarks ok?

Bowlarks?

Yeah, you know, down there autocorrect won't let me spell the actual word

keef66

What, you can't actually type bollocks?

keef66

So you can't! How about B0llocks?

dazz_ni45

Ahh...... The concussion must still be in play lol

Thankfully no damage at all which is surprising. From what I can recall, I was pitched sideways onto my elbow and shoulder so avoided the top tube which I'm sure my bowlarks are very thankful for!

laurentian

viewtopic.php?f=40004&t=13064693&hilit=ultegra

dazz_ni45

laurentian wrote:

http://www.bikeradar.com/forums/viewtopic.php?f=40004&t=13064693&hilit=ultegra

Thanks, one photo halfway down the first page is what happened to mine and interestingly the person after posted wondering if it was bearing failure. This is probably what shimano will also suggest but I'm not sure how you could prove it one way or the other...

buckmulligan

dazz_ni45 wrote:

Ahh...... The concussion must still be in play lol

Thankfully no damage at all which is surprising. From what I can recall, I was pitched sideways onto my elbow and shoulder so avoided the top tube which I'm sure my bowlarks are very thankful for!

Recently on the TrainerRoad podcast they were discussing chains snapping and one of the guys said he actually broke the top-tube on a carbon frame when the chain snapped and his crotch slammed down onto it! At least you can be thankful you were spared that fate, otherwise it would have felt like a very long walk indeed

Rodrego Hernandez

I broke a Dura ace left hand crank and sent it back to Madison who sent out to Shimano. Response came back that it was my fault that it had broken so they wouldn't replace. I asked them to return it so I could have it analysed myself. They then send a brand new one.

The Rookie

Sale of Goods Act (which applied when you bought it) not fit for purpose.

dazz_ni45

Well that's the bike sent back to Madison today. Should have been sent earlier in the week if hadn't have been for my unhelpful local bike shop so they have lost a customer and a different bike shop who I've never dealt with before has just gained one. Madison will only arrange collection from a bike shop that they have an account with otherwise I would have boxed it myself.

bendertherobot

Any update? Came across this on Facebook today.

ugo.santalucia

Is it normal to have a bearing stuck to the axle in Shimano HT2 cranks? Never seen anything like it

arthur_scrimshaw

ugo.santalucia wrote:

Is it normal to have a bearing stuck to the axle in Shimano HT2 cranks? Never seen anything like it

Yes that's weird - the bearing retaining cup is nowhere to be seen?

Man Of Lard

Is the red in the sandwich not the detached faceplate from the BB retaining cup? If I had a spare one here to take a chisel to, I'd take a look.

ugo.santalucia

Man Of Lard wrote:

Is the red in the sandwich not the detached faceplate from the BB retaining cup? If I had a spare one here to take a chisel to, I'd take a look.

If the spindle got so corroded and swell so much to fuse with the BB bearing, it is no surprise it also failed... I suspect these failures are down to very sloppy maintenance... ride on salty roads and never clean your bike kind of thing