Chain Going Slack

Postby asaint on Sat 1/Mar/14 7:41pm

On downhill sections when not pedalling as soon as I hit a bump a noise comes from the freewheel and the chain goes slack. When I start pedalling the noise disappears and the chain goes taught .
asaint
Member for: 4 years 4 months

Re: Chain Going Slack

Postby el_booto on Sat 1/Mar/14 7:52pm

Firstly, welcome to vorb
Secondly, can you give us some further information about your bike, drivetrain, wheels etc

The more info you have, the more you can be helped, to me it sounds like an issue with your freehub body (the ratchet mechanism that drives the rear wheel, could need replacing, or just a clean out)
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Re: Chain Going Slack

Postby asaint on Sat 1/Mar/14 8:33pm

Thanks for welcome. Is a Giant Trance XO full sus. Not sure of drivetrain. Makes sense to give freehub a clean out. Is that simple enough to do. I have a chain whip and cassette rachet. Got the bike second hand from a mate. He did a few karapoti classics with it. Have replaced the forks the cassette and chain and middle chain ring. Also I think the frame is wrong size for me as I have to have the seat right up to top. Is a medium(44.5 cms from middle of crank to top of seat post) I am nearly 6ft and weight 75kgs. Will try and sort out issue then buy anew bike.
asaint
Member for: 4 years 4 months

Re: Chain Going Slack

Postby asaint on Sat 1/Mar/14 9:05pm

Like the look of the 2014 MERIDA BIG NINETY-NINE 1000 from bike barn. Would like to convert to 1x9/10 though.
asaint
Member for: 4 years 4 months

Re: Chain Going Slack

Postby el_booto on Sat 1/Mar/14 9:13pm

Whats the wheelset? That will determine how user serviceable the freehub is

Frame size on the trance is maybe a tad small, but if you're comfortable with the fit I wouldn't go fixing what ain't broken
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Re: Chain Going Slack

Postby asaint on Sat 1/Mar/14 9:49pm

Mavic 26inch something. The stickers have worn off.
asaint
Member for: 4 years 4 months

Re: Chain Going Slack

Postby Velocipedestrian on Sat 1/Mar/14 10:01pm

That's the rim, he's asking what the hub is.
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Re: Chain Going Slack

Postby Slim on Sun 2/Mar/14 9:23am

Sounds like the trademark "mavic howl" assuming it's a mavic hub as well it's easy to fix. It's casued by a dry bushing. Google it, and you'll need some lightweight bushing lube, or some oil at the least. What ever you do, don't use grease in there.
Slim
Member for: 14 years 11 months

Re: Chain Going Slack

Postby shmoodiver on Sun 2/Mar/14 11:42am

Shimano mineral oil works quite nice
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Re: Chain Going Slack

Postby gumby on Sun 2/Mar/14 12:19pm

Slim wrote:Sounds like the trademark "mavic howl"


Image
gumby
Member for: 4 years 11 months

Re: Chain Going Slack

Postby Trail on Sun 2/Mar/14 5:53pm

asaint wrote:Mavic 26inch something. The stickers have worn off.

Mavic free hub would have been my first guess from the thread title... :paranoid:
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