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Snapped my first chain 2 months ago after doing approximately 1400 K in 6 months mostly Golfie,Dunkeld type of riding,now I have just snapped my 2nd Shimano Deore chain after only 2 months. The chain is cleaned every two rides using the Park chain cleaner and a heavily diluted Screwfix degreaser has anyone any idea why this is happing as both chains haven't even reached .75 wear
Not fitted correctly is the usual cause. Did you use a new pin?
I just find Shimano chains to be absolutely rubbish (and nothing to do with joining pins)
Used a power link. Fitted the chain the same way I have always done round the big ring front and back to measure it
Shimano chains have always had a reputation for snapping. IME most snappage is related to rough shifting technique, trying to shift multiple gears while mashing on the pedals.
Mashed shifts while climbing have been the cause of most my snapped chains
Edit, just beaten to it 😉
hols2 - MemberShimano chains have always had a reputation for snapping. IME most snappage is related to rough shifting technique, trying to shift multiple gears while mashing on the pedals.
but what's never been explained is why the same people can use another brand's chain for years with no issue?
If shimano do have this reputation my guess is that it's because of how they join - introducing human error. Some early ones were fragile though.
It's nothing to do with wear IME (as a mechanic).
Dunno but when splitting the chain to get rid of the damaged bit, it was evident the side plate had deformed on a sprocket tooth, twisting that link. The damage was nowhere near an existing join
If you're not running 1x, switch off the clutch on the mech.
Gives a lot more freedom in mashing gears IME.
cynic-al - MemberIf shimano do have this reputation my guess is that it's because of how they join - introducing human error. Some early ones were fragile though.
It's nothing to do with wear IME (as a mechanic).
In the OP and my own experience, the break isn't anywhere near the joining pin (which the OP didn't use anyway). So unless it's somehow translating a wonky force half-way around the chain, I'm not buying it (last one I had was 3 rides old when it went, the replacement Sram is over 2 years old with no issue so far)
Fair enough, still not statistically relevant though.
Rough shifting
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Soz, didn't realise we were going for deep statistical analysis.
Soz, didn't realise we were going for deep statistical analysis.
Anything less is just anecdote and so meaningless
Is this total balls as well then?
It's nothing to do with wear IME (as a mechanic).
hols2 - Member
Rough shifting
Didn't break though 😉
When you look how tiny bike chains are it's no wonder they can sometimes snap under lots of torque. Not always a faults pin or joint. Just too much power sometimes.
I have always avoided shimano chains since a brand new one snapped on me in 1994.
Never had a problem with sachs chains, whose business were bought out by Sram, aside from once when I got chain suck, pulled the chain out and then it snapped shortly after - must have bent it.
Aren't shimano made by KMC?
I've snapped shimano and sram - could be just a faulty chain?
The simplest explanation is just plain bad luck. I point you in the direction of the [url= https://en.wikipedia.org/wiki/Clustering_illusion#References ]Clustering Illusion[/url].
rjmccann10 has it
I caveated my response...also over 10 years of wrenching it's more relevant!