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PostPosted: Thu Nov 03, 2005 9:33 pm 
BoTM Winner
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Joined: Sun Oct 09, 2005 8:19 pm
Posts: 2197
Location: S WALES
whats the difference between cassette/freewheel
been on sjs to order chain and some other bits
not sure which i need
thanx again slim


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PostPosted: Thu Nov 03, 2005 9:39 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
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Location: kent
Thanks it is quite usefull . I meant the chainline might be too long at the front compared with the back ( or not long enough ) .

If I need to correct the chainline , I do it by adjusting the bottom bracket or changing it , right ?

I took the bottom bracket from my GT i drive to put on the Zaskar , that is why i may have a problem . The cranks are retro TNT Performance

I am not fit enough to use the small one anyway :lol:


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 Post subject: Re: 1 MORE
PostPosted: Fri Nov 04, 2005 9:40 am 
Old School Grand Master
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Joined: Tue Jun 28, 2005 11:02 am
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Location: Wookey Hole
SLIM wrote:
whats the difference between cassette/freewheel
been on sjs to order chain and some other bits
not sure which i need
thanx again slim


slim,

they say a picture tells a 1000 words

Image

Loads more info here > http://www.sheldonbrown.com/free-k7.html

Unless you've something real old you probably need a cassette.


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PostPosted: Fri Nov 04, 2005 9:52 am 
Old School Grand Master
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Location: Wookey Hole
cchris2lou wrote:
Thanks it is quite usefull . I meant the chainline might be too long at the front compared with the back ( or not long enough ) .

If I need to correct the chainline , I do it by adjusting the bottom bracket or changing it , right ?

I took the bottom bracket from my GT i drive to put on the Zaskar , that is why i may have a problem . The cranks are retro TNT Performance

I am not fit enough to use the small one anyway :lol:


Not 100% sure what you mean by too long or too short.

To check chainline visually put the bike in a stand or hold it up right. Stand behind the bike by the back wheel and check the alignment between the casette at the rear and the chainrings at the front. If you look parrallel to the sprockets the middle chainring should line up with the middle of the rear cassette (5 sprocket on a 9 speed, between 4 and 5 on 8 speed, 4 on a 7 speed).

Using trick cranks is a classic way to throw your chainline out since they tend to have a different 'q' factor to standard shimano cranks.

The normal way to sort this is to switch bottom brackets. This is assuming chainline is your problem rather than something else.....


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