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14-32 cs6800 cassette gearing

by CXR94Di2
Fri, May 01, 2015 16:18
26

I have combined/ mixed two cassettes( both cs6800 11speed) to give me a 14-32 cassette. Its great, I can attain 29 - 30 mph on the flat without have to spin crazily fast, have lovely mid range close ratios and 32T for bailout or steep hills. Ratios are 14 15 16 17 18 19 20 22 25 28 32.

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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26 comments

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oldbaldie | 7 years ago
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Thanks - very helpful

 

I dont think I need 11 & 12 toth sprockets ... but I reckon I may well need the 32! And closing up the gaps in the mid range will really help with group rides when I am struggling to keep up

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madcarew | 7 years ago
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If you want to mix and match more, if you have a drill press you can drill out the retaining pins on the 'one piece' parts of the clusters, or get a local engineer to do it. Be warned, they are hardened, so you need lots of pressure, slow speed, and cutting oil. 

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CXR94Di2 | 7 years ago
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You need a 14-28 Cass and 11-32 Cass. Combine to give. 14-15-16-17-18-19-20-22-25-28-32

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oldbaldie | 7 years ago
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Hi CRX94Di2

I have an 11 speed 11-28 cassette

I would like to move to 14-32 (or similar)

Obviously that will mean buying an 11-32 cassette

How close can I get to my ideal choice of: 14 15 16 17 18 19 (20-22)(25-28-32) please?

 

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CXR94Di2 | 9 years ago
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No, the small gears have spacers built into the casting, larger gears separate spacers. As long as cassette nips tight on the freehub you're good to go

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fukawitribe replied to CXR94Di2 | 9 years ago
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CXR94Di2 wrote:

No, the small gears have spacers built into the casting, larger gears separate spacers.

Aye, poor description, I meant apart from the spacers (only considering the small end of the block).

For some reason I thought the outer/internal section was differently machined on the terminal cogs, e.g. something to do with the lock-ring, but no idea why in particular and it's mostly wrong by the look of it. Looking at pictures online and cogs here the only real difference is the extra stripes/ridges on the outer face (and the part numbers) on the terminating cogs.

CXR94Di2 wrote:

As long as cassette nips tight on the freehub you're good to go

Grand - cheers for the heads-up.

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fukawitribe | 9 years ago
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Aaaaaaah - enlightenment. I had the impression that the final position cog had some magic voodoo shaping on them, and so you needed a specific one, but now looking at my spare 11-28 CS-6800 the only real difference I can see appears to be some striations on the inner part of the upper/outer face (lock-ring friction thingy I guess) - is that about right ?

I so i'm knocking up that 13-32 tonight..

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CXR94Di2 | 9 years ago
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You could have 13 14* 15 16 17 18 (20-22)(25-28-32)

*14t comes from 14-28 cassette. Either delete 14t and add 19t

The brackets ratios are gear clusters from the 11-32 cassette, or you change the 20-22 for 19-21 cluster. Just depends where you want the specific gear to be. Try it its dead easy to do. Chain whip and cass socket is all that is needed.

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adam900710 | 9 years ago
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Right, EV manual is much reliable than Shimano Japan.
And Nice combination and clever idea.
Thanks a lot, CXR94Di2.

BTW, if I have 11/28 and 11/32, may I create a 13/28 or 13/32?
I'm a little unsure to use 13 cog without spacer as the smallest cog.

Thanks.

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adam900710 | 9 years ago
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Interested in how to mix them.

I have 6800 11/32 cassette, but the largest 3 cogs are in one piece.
I hate the last 25 to 32 jump, hoping to insert 28 cog between them and remove the 11 cog.

But I didn't find a good idea to do it.

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CXR94Di2 replied to adam900710 | 9 years ago
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adam900710 wrote:

Interested in how to mix them.

I have 6800 11/32 cassette, but the largest 3 cogs are in one piece.
I hate the last 25 to 32 jump, hoping to insert 28 cog between them and remove the 11 cog.

But I didn't find a good idea to do it.

The last three from the 11-32 cass are 25,28,32.

If you then use the 14-28 cass for the other ratios.
You could also use a 12-25 cass. Check out shimano website to see which cassette combinations give you the desired ratios

See my original post for complete ratios

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adam900710 replied to CXR94Di2 | 9 years ago
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CXR94Di2 wrote:

The last three from the 11-32 cass are 25,28,32.

If you then use the 14-28 cass for the other ratios.
You could also use a 12-25 cass. Check out shimano website to see which cassette combinations give you the desired ratios

See my original post for complete ratios

Interesting, as Shimano Japan says the last 3 cogs for 11/32 cassette is 23-25-32:
http://cycle.shimano.co.jp/content/sic-bike/ja/home/components1/road/ult...
See オプション 5 (Option 5)

Maybe Shimano Japan is wrong?

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CXR94Di2 replied to adam900710 | 9 years ago
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adam900710 wrote:
CXR94Di2 wrote:

The last three from the 11-32 cass are 25,28,32.

If you then use the 14-28 cass for the other ratios.
You could also use a 12-25 cass. Check out shimano website to see which cassette combinations give you the desired ratios

See my original post for complete ratios

Interesting, as Shimano Japan says the last 3 cogs for 11/32 cassette is 23-25-32:
http://cycle.shimano.co.jp/content/sic-bike/ja/home/components1/road/ult...
See オプション 5 (Option 5)

Maybe Shimano Japan is wrong?

See this link to technical pdf from their website
http://si.shimano.com/php/download.php?file=pdf/ev/EV-CS-6800-3602B.pdf

It's a perfect look up table to see which ratios you can mix and match

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Simon E | 9 years ago
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Interesting, but I'd find those ratios a bit too close together when on the small chainring.

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CXR94Di2 | 9 years ago
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I now have 3 sets of cassettes one 10 speed that came with my kickr (don't need it as all my bikes are 11 speed) to sell one 12-25 cs6800 and the separated sets. I will keep them for spares 1

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CXR94Di2 | 9 years ago
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I now have 3 sets of cassettes one 10 speed that came with my kickr (don't need it as all my bikes are 11 speed) to sell. One 12-25 cs6800 and the separated sets. I will keep them for spares 1

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AJ101 | 9 years ago
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So how long until we get a load of unusually spaced cassettes on the classifieds with everyone's left over sprockets?! 3

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fukawitribe replied to AJ101 | 9 years ago
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AJ101 wrote:

So how long until we get a load of unusually spaced cassettes on the classifieds with everyone's left over sprockets?! 3

4 Good point - we'll just have to flog them on the MTB classifieds, they'll seem quite normal there....

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Batchy | 9 years ago
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I run a 6700 (10s) 12-28 cassette with a 52/36 6800 chainset. By taking out the 11t sprocket off an 11-28 then adding a16t sprocket gives me 12, 13, 14, 15, 16, 17, 19, 21, 24, 28 which is for me a really useful spread. The 36 ×28 will get me up everything round here in the Lakes and Dales.

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fukawitribe | 9 years ago
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Nice ! I'm still hankering after a 12/13-30 for my 6800, with closer ratios at the hilly end of the block, but can't do a DIY job... might try something more like this for a bit. How are you finding it ?

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CXR94Di2 replied to fukawitribe | 9 years ago
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I love it, no problems mechanical. The close ratios work very well. I checked my logs I rarely exceeded 30mph on the flat and didn't use 11 or 12 teeth to attain that speed. So I figured I didn't need them but preferred a closer ratios where I would spend most of my cruising speed 18-22mph. I need the 28-32 as I weigh 95kg

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Guernsey Donkey replied to fukawitribe | 9 years ago
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fukawitribe wrote:

Nice ! I'm still hankering after a 12/13-30 for my 6800, with closer ratios at the hilly end of the block, but can't do a DIY job... might try something more like this for a bit. How are you finding it ?

You can do a 12-32 biased to climbing with the 32-25 block from the 6800 11-32 and the rest from the Dura Ace 12-28 minus the 16T.

This gives you 12/13/14/15/17/19/21/23/25/28/32 which is six cogs at 19T or bigger as against five with the 11-32 on its own.

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fukawitribe replied to Guernsey Donkey | 9 years ago
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Guernsey Donkey wrote:
fukawitribe wrote:

Nice ! I'm still hankering after a 12/13-30 for my 6800, with closer ratios at the hilly end of the block, but can't do a DIY job... might try something more like this for a bit. How are you finding it ?

You can do a 12-32 biased to climbing with the 32-25 block from the 6800 11-32 and the rest from the Dura Ace 12-28 minus the 16T.

This gives you 12/13/14/15/17/19/21/23/25/28/32 which is six cogs at 19T or bigger as against five with the 11-32 on its own.

Aye, and I have the mid-range cogs from the 11-25 or 11-28 I could cannibalise, but it's the 3-3-4 jumps at the end of the 11-32 that I tend to find just that little bit wrong although I appreciate that little something a bit over the 28. Something like

13-14-15-16-17-19-21-23-25-27-30

would be interesting to try, although Miche do an off-the-shelf 12-30 which is tempting.

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CXR94Di2 | 9 years ago
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I have 50-34 on the front di2 gs derailleur, changes smoothly. I used the first 5 from the 11-32 cass ie 32 to 20 and the rest from the other cass.

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CXR94Di2 | 9 years ago
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I have 50-34 on the front di2 gs derailleur, changes smoothly. I used the first 5 from the 11-32 cass ie 32 to 20 and the rest from the other cass.

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AJ101 | 9 years ago
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What rings have you got on up front and what rear mech are you using with that?

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