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 Post subject: SRAM Red cassette wear
PostPosted: Thu Sep 11, 2014 4:58 pm 
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Joined: Thu Sep 11, 2014 4:50 pm
Posts: 3
Hi all,
I've been lurking for a while, but now have a question that I hope you can answer.

I have a Cervelo R3 Red that I'm in love with. I've put 7000km on the bike with very little maintenance other than cleaning. Last season (3500 km ago) I bought carbon wheels with a new SRAM Red dome cassette, but didn't replace the chain at that point. I wish my LBS had recommended that I do so.

Looking at my setup now, it's showing some wear. It's not malfunctioning at all. I just finished my first 140km GranFondo last weekend with no issues. I took the bike in after the event to another LBS and asked them to recommend maintenance. They think I should change everything, cassette, chain, chainrings, etc. MSRP on a cassette alone is $500. Nuts. About half that online.

Attached is a picture of the cassette. Can someone who knows what they're looking at give me a second opinion? Should I wait until I have problems to change things out?

Thanks.

Image


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 Post subject: SRAM Red cassette wear
Posted: Thu Sep 11, 2014 4:58 pm 


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PostPosted: Thu Sep 11, 2014 5:44 pm 
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Joined: Sat Apr 18, 2009 8:59 am
Posts: 545
Location: Surrey UK
In the future invest few $ buying a chain measuring tool http://www.londoncyclist.co.uk/wp-conte ... n-wear.jpg

There is no chain which wouldn't start eating the cogs after such a mileage. Chainrings tend to last much longer.
There is no point replacing cassette, chain and rings if they still work without the issues.
In this case just ride it till it's completely dead and in the meantime start saving money for the replacements ;)

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PostPosted: Thu Sep 11, 2014 5:47 pm 
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Joined: Thu Oct 26, 2006 8:54 pm
Posts: 386
Location: USA
Call me crazy, but this doesn't look all that bad to me: when cassettes wear badly you end with squared off leading edges of the valleys and the trailing edges of the tops of the teeth get worn down. I don't see much of that on your cassette. Is it the seemingly missing teeth that you are concerned about? Because that's the way the older sram red powerdome cassettes were designed. Or the shaping on the leading edges and tops of the teeth? Because that's also part of the design. If it were me, I'd just clean it and install a new chain. If that leads to problems (eg chain slip) then a new cassette would be needed, but I don't think that'll happen. Here's a photo of a new cassette for comparison:

Image

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PostPosted: Thu Sep 11, 2014 5:55 pm 
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Joined: Fri Apr 18, 2008 12:55 am
Posts: 140
That cassette isn't actually super worn out. There is very, very little shark toothing (where the actual cassette teeth begin to wear and fold backwards slightly). Looks like it still has quite a few miles left on it. Also, 1090 10 spd cassette online are WAY cheaper than 500$. You can also just ride a 1070 sram cassette or 10 spd shimano ultegra cassette without any issues (I rock sram everything, but train on 1070 and Ultegra cassettes). As the previous poster, chain wear tools are awesome. Use them religiously and replace your chain when it is worn (stretched) and your cassette and chainring will last a long time.


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PostPosted: Thu Sep 11, 2014 6:31 pm 
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Cassette looks fine to me. I would just replace the chain as soon as possible. And get a chain wear tool so you know when to replace your next chain.


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PostPosted: Thu Sep 11, 2014 6:35 pm 
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Joined: Fri Nov 18, 2011 5:19 am
Posts: 816
The cassette looks noisy! I'll sell you a used xg1090 for $100 :D


But really, replacing the chain a couple times a year is a great practice. That cassette doesn't look terrible.


Last edited by Imaking20 on Thu Sep 11, 2014 10:58 pm, edited 1 time in total.

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PostPosted: Thu Sep 11, 2014 7:14 pm 
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Joined: Thu Sep 11, 2014 4:50 pm
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Thanks so much everyone. New chain it is. I'll grab one today.


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PostPosted: Thu Sep 11, 2014 7:44 pm 
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Joined: Sat Mar 06, 2010 10:34 pm
Posts: 163
I replace the cassette when the thing wont hold a gear under acceleration. The 1090s last a loooooong time. I clean the outer links every other ride and apply fresh lube, about 5 or 6 drops. NFS is the best chain lube i have ever used. ("NixFrixShun") Replace chain when my park tool says if its worn or not. I get a kmc x10sl off ebay for like $40 shipped.


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PostPosted: Thu Sep 11, 2014 8:25 pm 
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Joined: Fri Jan 31, 2014 4:54 pm
Posts: 201
Try the new chain. If cassette is worn much, it will start jumping on cassette which means that you need to change it too...

As everyone mentioned, checking the chain length regularly is really handy and money saving in long term.

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PostPosted: Fri Sep 12, 2014 7:39 am 
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Joined: Fri Apr 29, 2011 3:28 pm
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Location: portugal
What about the front rings? Are they worn?


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PostPosted: Fri Sep 12, 2014 10:21 am 
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Joined: Sun Jul 17, 2011 6:34 am
Posts: 163
ToffieBoi wrote:
Try the new chain. If cassette is worn much, it will start jumping on cassette which means that you need to change it too...
:thumbup:
Also agree with nickf, kmc x10sl off ebay for like $40 shipped. Initially started measuring the chains but it is now predictable. 3 to 4 chains a year, so just wait for Strava to tell me when 5000 km is up, then install new chain.
I am happy to be conservative with chains (replace a little earlier than the chain tool tells me) as I know I will get the most out of those very costly XG1090 cassettes.
I clean and lube the chain every 300 - 400 km.
The front chainrings usually last a loooong time. If you cassette is not too bad, your chainrings should be fine.


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PostPosted: Fri Sep 12, 2014 1:21 pm 
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Joined: Fri Apr 29, 2011 3:28 pm
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Location: portugal
5000km a chain? Ain't that a bit too much?


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PostPosted: Fri Sep 12, 2014 2:50 pm 
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Joined: Sat May 26, 2012 11:26 pm
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I agree with the options here. Cassette looks fine. Replace chain frequently, i use KMC x10SL on Red. I replace ever 2000K. I don't lube the chain, i don't ride in the wet, i just clean the grit off it periodically. I know this is controversial.

Sounds like you need either a new LBS, or better yet, just buy some tools and do it all yourself. Saves money in the medium-long term and less frustrating than dealing with LBS. Chain rings take forever to die in my experience. Must have 20,000K on my rotor rings and they are still going strong.

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PostPosted: Fri Sep 12, 2014 3:38 pm 
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Joined: Fri Jan 31, 2014 2:52 pm
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I wish. I've been through 5 chains and 3 cassettes since last winter. I need to find a supplier of affordable 11 tooth cogs.


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PostPosted: Fri Sep 12, 2014 3:57 pm 
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Joined: Tue Mar 15, 2005 2:43 am
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Location: The 'Dena
2000 kms for a new chain .. do you light your cigars with $100 bills ?


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Posted: Fri Sep 12, 2014 3:57 pm 


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