MoAlpha

In my fleet, chain stay length is a major determinant of chain life. A shorter chain has to operate over higher angles between the chainrings and cassette and seems to wear faster for that reason.

SoSmellyAir

This is more food for thought. I am currently using the medium cage 105 (RD-5800) derailleur (because my bike came with a 11-32 cassette) with an Ultegra 12-25 cassette, so the chain geometry is not ideal, i.e., the respective centers of the cassette, guide pulley, and tension pulley are not all in a straight line that is perpendicular to the ground when the chain is on the big chain ring and smallest cog as shown in the Shimano dealer manual under "Assemble with sprocket max 27T or less".

SoSmellyAir

As a MAMIL with a post-graduate professional degree (but not in dentistry; why do cycling dentists catch so much flak?), I am sure that I do not make "hellatious amounts of power" at any time, even during the short sprint to rush home. Most likely I have a defective link in my old chain exacerbated by the soak in purple degreaser described above.

Iride01 

Do they? I never realized that. You should have heard us at the airport talking about doctors and their Beechcraft Bonanza's. <grin>

MoAlpha

Cervélos kill dentists?

SoSmellyAir

I cannot believe that Silca just straight up took my photo without credit or link.



Hydrogen Embrittlement, Can You Really Break a Chain? – SILCA

Sy Reene

At least you now know why your chain broke.

Shadco 

You should get a lifetime supply of Nastro Piloti bar tape as compensation.

.

Koyote

Since they're using it "for profit" (i.e., to sell their products), that likely qualifies as copyright infringement. You could contact them and ask them to take it down.

Bah Humbug

It also really surprises me they did it.

Sy Reene

the BF terms of service pasted below:

Conceivably BF provided this content to Silca.
Conceivably BF could pursue Silca to take it down or remunerate BF?

"You automatically grant and assign to us, and you represent and warrant that you have the right to grant and assign to us, a perpetual, irrevocable, unlimited, fully paid, fully sub-licensable (through multiple tiers), worldwide license to copy, perform, display, distribute, prepare derivative works from (including, without limitation, incorporating into other works) and otherwise use any content that you post. You also expressly grant and assign to us all rights and causes of action to prohibit and enforce against any unauthorized copying, performance, display, distribution, use or exploitation of, or creation of derivative works from, any content that you post (including but not limited to any unauthorized downloading, extraction, harvesting, collection or aggregation of content that you post)."

Mojo31

Damn, a play right out of the FaceBook terms of service.

msu2001la

I think it's far more likely that a Silca intern was tasked with finding a photo of a broken chain, opened up Google and typed "broken bike chain" and this thread came up. Right click- save as.
I'd be willing to cut Silca some slack on this topic - they're posting a blog, not writing for the New York Times.

That said, when I click on the link I don't see the photo. The main blog page that shows thumbnail images shows a different broken chain photo. Maybe they took it down?

datlas 

Agree anything you post here is likely going to be "public domain" so unless it's over the line I would accept it.

Koyote

Actually, news coverage would most likely constitute 'fair use,' while using the photo for commercial purposes (as is Silca, since they are using it to sell chain cleaning substances) would be more likely to constitute infringement.

However, if BF allows Silca to pilfer the photos, all bets are off.

SoSmellyAir

I contacted Silca and Silca offered to take it down, so I supposed it has done so. I also asked how long my photo has been up on the Silca blog, but have not heard back.

SoSmellyAir

That may be so, but a grant of "all rights and causes of action" is vague and unclear as to the scope of the grant. The better practice even when it comes to a grant of "exclusive rights" is to specify whether the scope of such exclusivity extends to excluding the grantor.

ussprinceton

you can get a new Dura-Ace chain on eBay for around $20

t2p

yes - that’s the easy part

but is it genuine Shimano - or a counterfeit ?

ussprinceton

yeah, I see what you're saying. It could be genuine, or it could be counterfeit. But, for only $20 a pop, you can buy several. Buy spare links, in case they do break. You'll get your money's worth for how ever long they will last

t2p

well then you gotta hope you have a genuine quick link - and not a counterfeit lol

and hopefully the RD was not damaged when the failed chain passed through the pulleys

and if all that checks out - gotta hope your brake pads are not counterfeits that’s crumble into pieces when you return to your car

and actually - if the counterfeit chains wear as some state they do - you could risk premature wear or damage to your cassette

so if anyone’s keeping score - I’m potentially down a chain, quick link, cassette, and RD lol

Troul 

I'm thinking the chain material had a flaw & you pulled the short straw with that purchase.

Troul 

This is one of the things that drives "shopping" around for the best deal.

Until the above can be resolved on the spot at the time of purchase, many will continue to seek out the cheapest price knowing the risk of it being a knock-off is rather real.

ussprinceton

if that is the case, bite the bullet and buy a genuine Shimano

eduskator

Might as well buy a cheap but genuine chain from a reputable brand than a fake Dura-Ace chain. Last thing you want is your chain snapping while you're sprinting and putting 1000w on your crankset. Your legs and knees will thank me later.