[hawkinspeter]

I had noticed a creak/noise from my bike, especially when accelerating from stopped. It sounded almost like the chain clunking into position, so I ended up replacing my outer chainring as it was a few years old, but the noise persisted. I was contemplating whether it was pedals, bottom bracket bearing or even rear cassette, but yesterday I discovered the answer.

I was just starting off on a ride and heading uphill on my road – negotiated my way round a van coming downhill and then got off the saddle to accelerate and start warming up. Hit the deck almost outside my front door and luckily got a lightly grazed knee and knuckle out of it, though my handlebars looked very skewed. The van driver did stop and check that I was okay which was nice of him.

So, sometimes a creaky noise isn’t what you think it is.

Topic

[Liam Cahill]

I’ve got a fairly significant

I’ve got a fairly significant click that I can’t find the source of. Time to inspect the crank properly I think

[matthewn5]

Common problem, see https:/

Common problem, see https://www.instagram.com/thanksshimano/

[hawkinspeter]

I just removed the left crank

I just removed the left crank and have had a close look at both cranks – no sign of the bonding coming loose or any other cracks that I can see. Probably metal fatigue from where I accelerate as hard as possible away from lights etc.

I’ve also put a couple of those stickers onto my wheel rims – you can just about see one of them.

[HoarseMann]

Good idea for reflective

Good idea for reflective placement!

Perhaps Shimano have gone a step too far in the quest for lightness with epoxy bonding a crankset.

[hawkinspeter]

The black bits are the ends

The black bits are the ends of a black-reflective sticker that I’d put on both cranks – not part of the crank itself.

Something similar to these

[HoarseMann]

Blimey, that could have been

Blimey, that could have been very nasty. Seems to becoming a common problem with these cranks, well explained in this video https://youtu.be/FkEkQV-zK0s?t=181.

What are those black dot stickers near the pedal end? Did you get cracking there?

[hawkinspeter]

Thanks.

Thanks.

I think I lead a charmed life – I could hardly have been closer to home and I’ve had worse injuries trying to remove a pedal. I only bothered putting a plaster on my knuckle when I went to bed as it was still weeping (for the lost crank).

Talking of pedals, I tried to remove the pedal from the broken crank without any luck, so I’m going to go for a pair of PD-ES600s to replace my old, stuck PD-A600s.

[Welsh boy]

Hope your injuries are not

Hope your injuries are not too bad but a for that chainset, in the words of Edmond Blackadder, it rhymes with “clucking bell”. That could have been very nasty. 

[Author]

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