new road wheel/cassette question

jjcp
Posts: 39
Joined: Wed Dec 21, 2011 6:10 pm

new road wheel/cassette question

Postby jjcp » Sat Oct 20, 2012 7:16 am

Hi All,

A newbie question.

So after purchasing my first new set of road wheels. I decided to mix the gearing and bought a new cassette aswell. Now here is the question/problem: 1) why is the middle part of the cassette loose? i have tightened it according to the shimano intructions.Do i need spacers? 2) it wont shift to the biggest cog. Do i need to adjust the rear derailleur? 3) there are some noise when shifting up/down. I am pretty sure its the chain rubbing against the cassette.

Here are the specs:

Groupset: Full Ultegra 6700, cassette: 12-25

New cassette: 11-23

thanks all

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Bentnose
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Joined: Sun Jan 03, 2010 9:00 am
Location: N/E suburbs Melbourne, Victoria

Re: new road wheel/cassette question

Postby Bentnose » Sat Oct 20, 2012 9:41 am

Are you sure you aren't missing some spacers in the middle, I just put a new Ultegra cassette on my bike and it was nearly all loose sprokets with loose spacers in between, can you see a spacer between every cog?
2016 totals last time I checked 1136km, 18718M elevation, 60 hrs, 51 rides

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open roader
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Joined: Tue Jul 28, 2009 7:05 pm
Location: Dueling Banjo Country

Re: new road wheel/cassette question

Postby open roader » Sun Oct 21, 2012 3:10 pm

+ 1 spacer placement most likely.

Check, check, double check......?

A 25 tooth cog is not going to create a chain / cage length issue and the rear derailleur should maintain it's alignment if you are switch between like for like cassettes. My guess without seeing the set up is that the biggest cog (25t) is set too far into the hub for the rear derailleur to engage meaning a cog spacing issue..........
3rd class cycling is always better than 1st class walking

jjcp
Posts: 39
Joined: Wed Dec 21, 2011 6:10 pm

Re: new road wheel/cassette question

Postby jjcp » Mon Oct 22, 2012 12:12 pm

it looks like I need a mavic spacer instead of the shimano ones.

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biker jk
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Joined: Tue Nov 17, 2009 6:18 pm
Location: Sydney

Re: new road wheel/cassette question

Postby biker jk » Mon Oct 22, 2012 8:06 pm

When I changed a cassette on a friend's Mavic rear wheel (some time ago now) I had to use both the Mavic spacer and the Shimano spacer.

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