Braden1550

So I'm out, minding my own business in our Australian summer, doing my sprint training, when SNAAAAAAAAAAAAAAAPPPPPPPPPPPPPPPPPP goes my chain. It had less then 700km on it.

I dunno if I'm proud or dissapointed (that it didn't last), but either way, a 6700 chain replaced it ($70 ). This has made the shifting noticeably better then the 105, quicker to jump up and drop down the stack, and it actually made the drivetrain feel more responsive overall.
And 6700, for $70, shouldn't completely **** itself like my 105 chain did.

rollin

If anything 105 chains are more resilient than the 6700

Grambo

Shimano chain pin was not installed correctly on the 105 chain. That's pretty much the only way a break like that would occur with only 700 KM.

Namenda

If your ride improved that much with a chain change, there was something wrong with the original chain. And, if the chain had that little mileage on it, and had something wrong with it, that something was likely you, or the person that put the bike together for you. Installed correctly, and kept reasonably clean, a Shimano chain will last much much longer that that, and without a noticable performance degradation.

Namenda

Okay, Mr. Muscles.

Braden1550

oh c'mon, although thats a bs reason, lemme have it!
(for the record, I know that all 58kg of me wasn't responsible for the break...but it's a good story for unknowing/non cyclists)

It was installed by a mechanic recently offered a job at Columbia-HTC, so if something was wrong with the installation, I feel sorry for cav...

RacerOne

Velo Dog

Not to rub it in, but in the hope of avoiding future trouble, I agree. I don't use Shimano chains anymore (they lost me when they started requiring that stupid pin), but I've never had a failure on ANY chain, even though I weigh 240 and (used to) ride pretty hard. I'd suspect either an installation mistake or some kind of shifting-related abuse, like not "soft-pedaling" for half a revolution when you shift.

clutchy

those are some beefy guads.