Chain Drop
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onedego



Joined: 01 Feb 2009
Posts: 35
Location: Wigan

PostPosted: Sat Feb 07, 2009 10:36 pm    Post subject: Chain Drop Reply with quote

Hey Guys, me again...

I've realised that I appear to have developed a problem... and it's a rather large problem..

Whilst changing down on the front gears, when i hit the lower cog, and any of the 2 or 3 lower cogs on the back, whilst pushing hard on the pedles, the chain drops...

I'm thinking that the chain could do with a good lube, as it seemed to develop without anything being adjusted, and the bike was out of use in between it running fine, and not...

Anyone give me any ideas?

Thanks guys!

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SeanO



Joined: 17 Feb 2008
Posts: 1644

PostPosted: Sat Feb 07, 2009 11:11 pm    Post subject: Reply with quote

Its probably just wear on the gears causing it to sneak past the low limit on the front mech. Adjust your front mech low limit screw to prevent in future.
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onedego



Joined: 01 Feb 2009
Posts: 35
Location: Wigan

PostPosted: Sun Feb 08, 2009 9:18 am    Post subject: Reply with quote

cheers for the answer, i'll give that ago before my trip out today...
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Steve Kish



Joined: 06 Jan 2009
Posts: 8029
Location: Near Heathrow

PostPosted: Sun Feb 08, 2009 2:43 pm    Post subject: Reply with quote

There is also a train of thought that whilst all gears should be useable in the middle ring, the two smallest/smallest and biggest/biggest chainring/sprocket combinations should not be used because of the chain line being too extreme.

Might be the cheapest and easiest way out! Wink Very Happy
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Gunner



Joined: 15 Apr 2007
Posts: 29329
Location: Under Whitestone-Cliffe on the Lake.

PostPosted: Sun Feb 08, 2009 2:55 pm    Post subject: Reply with quote

SeanO wrote:
Its probably just wear on the gears causing it to sneak past the low limit on the front mech. Adjust your front mech low limit screw to prevent in future.



Yes, most likely.

Have a look here;

http://www.parktool.com/repair/readhowto.asp?id=75


Wink

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onedego



Joined: 01 Feb 2009
Posts: 35
Location: Wigan

PostPosted: Sun Feb 08, 2009 4:02 pm    Post subject: Reply with quote

well, it turns out that it was nothing to do with the mechanisms...

On a trip up the road on the way to our destination today, the chain dropped without me even changing gear... i stopped picked the chain up, and noticed a huge bend in the chain!

So a new chain for me... swapped out already and tested and all is much better. So next week, we'll try again, with the ATC2K on bars Smile

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Gunner



Joined: 15 Apr 2007
Posts: 29329
Location: Under Whitestone-Cliffe on the Lake.

PostPosted: Sun Feb 08, 2009 5:35 pm    Post subject: Reply with quote

Looking forward to seeing the ATC2K footage from your bars, that's for sure Wink
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mr-marty-martin



Joined: 30 Jun 2008
Posts: 3778

PostPosted: Sun Feb 08, 2009 5:39 pm    Post subject: Reply with quote

yep me too

im intrested in helemt cams now, a want one for next seasons cross Razz


that would be a great adition to the race reports, LIVE COVERAGE
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Dale
Site Admin


Joined: 12 Apr 2007
Posts: 1178
Location: Middlesbrough

PostPosted: Sun Feb 08, 2009 5:41 pm    Post subject: Reply with quote

Live coverage, haha Very Happy

Would be good though, i've still yet to test my all new 5k out, was ment too yesterday but obviously the weather wasn't exactly at it's best!

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onedego



Joined: 01 Feb 2009
Posts: 35
Location: Wigan

PostPosted: Sun Feb 08, 2009 7:21 pm    Post subject: Reply with quote

We've not been hit too badly by snow in the North West in all honesty. There hasn't been anything that made me think "holy crackers, I wouldn't go out in that". We got a bit of a drift flying in now, but that wont do anything to us.
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