Broken Teeth on Camag Cassette

hobojojo

Hi,

The groupset on my racer is Campagnolo Veloce and my bike is a ten speed. The most difficult gear on my back cassette had been jumping the last few times i'v been out, so after my cycle today i took a closer look and it turns out that one side of the smallest cog on my cassette is wrecked. 6 teeth on one side are either broken off or chipped at the top, while the remaining 6 teeth are fine.

Can i replace just the broken cog and do i need to get a cog specifically for a Veloce Cassette? Alternatively, should i just buy a whole new Campagnolo Veloce 10 Speed Cassette? I shopped around online and ill get one for £37.99 including delivery from slane cycles, cheaper than both crc and wiggle.

http://www.slanecycles.co.uk/productdetail.aspx?id=710&subid=339&catid=67

Is this a job i can do myself?



Also, my bike is a compact double and when i first got the bike my front derailleur had 3 settings. the first one put me in the smaller cog of my crankset. the second put me in the bigger cog of my crankset for when i was in the bigger (easier) cogs on my back derailleur. Finally, the third kept me in the bigger cog on the crankset but moved the chain the slightest bit to the right for when i was in the smaller (tougher) cogs on the back derailleur.

Around 2 months ago i left my bike into my LBS as i had a problem with my back derailleur, and when i got it back my front derailleur only had two settings; big or small. i hadn't asked them to do this and didnt notice till i got home. Also, there seemed to be no reason for this to be done as i had left the bike in to have the back derailleur sorted, not the front.
Could this be putting too much pressure on the smallest cog on my cassette, as i know the reason for 3 front derailleur settings is so that the chain can move from the big to small gears on the cassette without rubbing off anything and to prevent any sideways pressure on the chain. is it likely that having only 2 settings on my front derailleur has caused this damage? it may have been slowly chipping away at the teeth and then once the chips got back the chain would have skipped more (which it has been doing more and more lately) and could have knocked off a few teeth?

cheers for any advise in advance

sean_d

hobojojo wrote: »

Hi,

The groupset on my racer is Campagnolo Veloce and my bike is a ten speed. The most difficult gear on my back cassette had been jumping the last few times i'v been out, so after my cycle today i took a closer look and it turns out that one side of the smallest cog on my cassette is wrecked. 6 teeth on one side are either broken off or chipped at the top, while the remaining 6 teeth are fine.

Can i replace just the broken cog and do i need to get a cog specifically for a Veloce Cassette? Alternatively, should i just buy a whole new Campagnolo Veloce 10 Speed Cassette? I shopped around online and ill get one for £37.99 including delivery from slane cycles, cheaper than both crc and wiggle.

http://www.slanecycles.co.uk/productdetail.aspx?id=710&subid=339&catid=67

Is this a job i can do myself?

Yes - you'll need a chainwhip and Campagnolo compatible lockring tool. It'll take you all of 5 mins (including time to clean everything around there when you have the cassette off...)
It is always advised to replace the cassette, chain and chainrings in one go, as they wear together. You should seriously consider this, lest you be plagued by worse (and potentially dangerous) chain-slippage as before.
I think you'll find it pretty difficult to track down a single cassette ring, unless you've got a few mates with similar running gear who are replacing it around now too...
Cycle Superstore and High-on-bikes ebay store can have good prices on Campy stuff too...

Also, my bike is a compact double and when i first got the bike my front derailleur had 3 settings. the first one put me in the smaller cog of my crankset. the second put me in the bigger cog of my crankset for when i was in the bigger (easier) cogs on my back derailleur. Finally, the third kept me in the bigger cog on the crankset but moved the chain the slightest bit to the right for when i was in the smaller (tougher) cogs on the back derailleur.

Around 2 months ago i left my bike into my LBS as i had a problem with my back derailleur, and when i got it back my front derailleur only had two settings; big or small. i hadn't asked them to do this and didnt notice till i got home. Also, there seemed to be no reason for this to be done as i had left the bike in to have the back derailleur sorted, not the front.
Could this be putting too much pressure on the smallest cog on my cassette, as i know the reason for 3 front derailleur settings is so that the chain can move from the big to small gears on the cassette without rubbing off anything and to prevent any sideways pressure on the chain. is it likely that having only 2 settings on my front derailleur has caused this damage? it may have been slowly chipping away at the teeth and then once the chips got back the chain would have skipped more (which it has been doing more and more lately) and could have knocked off a few teeth?

cheers for any advise in advance

It's pretty unlikely that this was the cause, I'd wager that you've just worn out the cassette. Do you keep your chain nice and clean? Its not acting like a belt sander with a load of gunk and grit on it, is it?

hobojojo

sean_d wrote: »

Yes - you'll need a chainwhip and Campagnolo compatible lockring tool. It'll take you all of 5 mins (including time to clean everything around there when you have the cassette off...)
It is always advised to replace the cassette, chain and chainrings in one go, as they wear together. You should seriously consider this, lest you be plagued by worse (and potentially dangerous) chain-slippage as before.
I think you'll find it pretty difficult to track down a single cassette ring, unless you've got a few mates with similar running gear who are replacing it around now too...
Cycle Superstore and High-on-bikes ebay store can have good prices on Campy stuff too...

Looked up Cycle Superstore and ill get a Veloce 10 speed cassette and chainwhip for €50 and ill get a Campag lockring tool off CRC for about €15, so total cost of €65. I'm also going to buy a new chain as you said, looking at ebay for that.

Is it a simple case of just chainging the cassette and chain? or will the derailleurs need ajusting?

sean_d

Simply pull off the wheel, change the cassette, reinsert wheel, replace chain. Shouldn't be anything more to it than that, unless you happen to radically change your cassette ratios...in which case you may need to adjust the vertical position of the rear mech.

I'd have a look at doing the chainrings too while you're at it.

What I usually do, to prolong life, is to buy chains in 2's or 3's (CRC triple packs are great ) and rotate them every few weeks, thus not wearing down the cassette and chainrings as much