new chain.....but new cassette ?
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mr-marty-martin



Joined: 30 Jun 2008
Posts: 3778

PostPosted: Mon Nov 10, 2008 8:22 pm    Post subject: new chain.....but new cassette ? Reply with quote

after snapping my chain on sunday after the race, i decided instead of rejoining it im going to get a new one ( as the one the cross bike had on was raced allover the place so it'll be abit streched by now )

so should i get a new cassette aswell, as ive heard running a new chain on a worn cassette may cause the chain to jump, also im needing a couple more lower gears for the cross so it may also help that


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Dave F



Joined: 06 May 2008
Posts: 781
Location: Darlington

PostPosted: Mon Nov 10, 2008 8:30 pm    Post subject: Reply with quote

You shouldn't need a new cassette matey, but it's usually a good idea to change middle and granny rings, if they're getting on a bit.

I had my last cassette for four years - and changed the chain and rings half a dozen times.
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mr-marty-martin



Joined: 30 Jun 2008
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PostPosted: Mon Nov 10, 2008 8:40 pm    Post subject: Reply with quote

thanks for that dave, a think al get a new chain tomorow, then see how it go's through the weeks training rides. if its jumping etc al get it sorted before the race
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tomlevell



Joined: 13 Apr 2008
Posts: 989

PostPosted: Mon Nov 10, 2008 9:19 pm    Post subject: Reply with quote

Depending on how much you've actually worn the chain you may or may not need a new cassette. As the cassette wears to the old chain you will generally get problems.
Chainrings need replacing when they are either hooking the chain or slipping under power (if not sooner).

or leave them till they look like this.

;0)
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mr-marty-martin



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PostPosted: Mon Nov 10, 2008 9:21 pm    Post subject: Reply with quote

wow thats realy damadged Shocked
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SeanO



Joined: 17 Feb 2008
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PostPosted: Mon Nov 10, 2008 11:22 pm    Post subject: Reply with quote

Are they yours Tom? Shocked
Whats the story with them?

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mr-marty-martin



Joined: 30 Jun 2008
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PostPosted: Mon Nov 10, 2008 11:24 pm    Post subject: Reply with quote

a thought they were of a still saw or sumin Laughing
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tomlevell



Joined: 13 Apr 2008
Posts: 989

PostPosted: Tue Nov 11, 2008 10:32 am    Post subject: Reply with quote

Hah no. That's a loony friend who does 30-40miles a day offroad and is sick of things breaking.
They get his stamp of approval though.
Surly Chainring is 4 years old and probably had 10000miles on it and the On One cog looks like it did 1500miles.
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SeanO



Joined: 17 Feb 2008
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PostPosted: Tue Nov 11, 2008 4:51 pm    Post subject: Reply with quote

tomlevell wrote:

Surly Chainring is 4 years old and probably had 10000miles on it


Thats impressive, cant imagine how they would even work looking like that!

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mr-marty-martin



Joined: 30 Jun 2008
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PostPosted: Tue Nov 11, 2008 8:20 pm    Post subject: Reply with quote

got a new chain today, went runnin down to the lbs so it mixed in with the weeks training plan (50 mins, hard work)

when we put it on we got it to the rite size, but i was getting chain suck. so just to clean things up we degreased the rear cassette and got it lookin like new. eli-d had to go out by this point and i havnt got any lights in ma garage so worked stoped till tomorow.

although when we put the cassette back on and i tried it it wasnt to bad, although the gears need setting up again, am goin to get a new cassette through the week anyway, as even when the cassette has been tightened to the rite tork a few of the sprockets had a bit of play in them
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mr-marty-martin



Joined: 30 Jun 2008
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PostPosted: Fri Nov 14, 2008 9:33 pm    Post subject: Reply with quote

ordered a new cassette today, so av got option of putting up to a 30 on my cross bike, but i realy need to keep the low end for the bigger races, as there usualy flat. so the new cassette go's down to the same gearing as ive got now, but more seperated if you no what a mean
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Rallyestyle



Joined: 21 Aug 2008
Posts: 15

PostPosted: Sat Nov 15, 2008 5:22 pm    Post subject: Reply with quote

Hi all,

Just changed the chain on my bike as it was skipping every now and then but with the new chain installed the chain is skippin/jumping seriously to the point that im not happy riding it Sad

I do 125 miles a week and have been doing so since May when i got the bike, i have not replaced any parts since so im expecting my leaving the chain so long may have damaged the cassette (it looks mint however). The chainrings are worn slightly but no way to the extent of those pictured above, i think they are fine.

Any tips from those in the know? Cassette replacement the best option?

Bike is a Specialized Rockhopper Pro 2008 by the way Very Happy

Cheers all Smile

Tom
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K88MUD



Joined: 20 Sep 2008
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Location: New Marske

PostPosted: Sat Nov 15, 2008 6:25 pm    Post subject: Reply with quote

I was always told that if you change one then you should change them all.
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bry5



Joined: 16 Sep 2008
Posts: 424
Location: Leeds

PostPosted: Sat Nov 15, 2008 6:53 pm    Post subject: Reply with quote

Rallyestyle wrote:
Hi all,

Just changed the chain on my bike as it was skipping every now and then but with the new chain installed the chain is skippin/jumping seriously to the point that im not happy riding it Sad

I do 125 miles a week and have been doing so since May when i got the bike, i have not replaced any parts since so im expecting my leaving the chain so long may have damaged the cassette (it looks mint however). The chainrings are worn slightly but no way to the extent of those pictured above, i think they are fine.

Any tips from those in the know? Cassette replacement the best option?

Bike is a Specialized Rockhopper Pro 2008 by the way Very Happy

Cheers all Smile

Tom


Almost certainly the new chain is causing the problems, the old chain and the cassette will have both worn away after 125 miles a week, but they wear away together meaning they fit each other just right.

Your faced with either buying a new cassette or going back to the old chain. Was there anything wrong with the old chain other than a bit of slippage? Its possible that the original slippage might have just been a common indexing problem that could have been fixed by giving the gears a good service.

You could try the old chain and a service to save you the 30 cassette costs

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Gunner



Joined: 15 Apr 2007
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Location: Under Whitestone-Cliffe on the Lake.

PostPosted: Sat Nov 15, 2008 7:20 pm    Post subject: Reply with quote

I think we need to know more!!!

What part of the drivechain is slipping/skipping?

Is it the front chainrings?

Is it the rear cassette?

Is it both?

Is it happening all the time or just under load?

Is there noise from the rear cassette/chain just while pedalling normally?

Is the rear wheel on straight?


Wink

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