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Help with Shimano 105 5600 to 5700 upgrade

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Help with Shimano 105 5600 to 5700 upgrade

Old 06-16-19, 03:21 PM
  #1  
mnmkpedals 
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Help with Shimano 105 5600 to 5700 upgrade

Hi, I usually post in the vintage forum, since my knowledge base is mostly friction shifting....


Anyway, I just bought an 2011 Specialized bike for my wife, which is original Shimano 105, 5600 series.... It is a triple in front with 10 speed maxing out at the top rated 27T in back.

I want to change the rear derailleur to a 5700 (since it is rated to 30T) and of course, then change the cassette to a same era cluster that tops out at 30T, but keeping the same hub/wheelset.

I know the 5700 RDR can handle the 30 and the total capacity, but will it work with the 5600 brifters?

I've read through old threads, and there's conflicting information.

Any experience or wisdom appreciated!!
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Old 06-16-19, 03:25 PM
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Yes, they will work together just fine.
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Old 06-16-19, 03:46 PM
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Agreed^ Also, it's possible the 30 tooth will work with your 5600 RD, might want to try it.
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Old 06-16-19, 03:56 PM
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Originally Posted by shelbyfv View Post
Agreed^ Also, it's possible the 30 tooth will work with your 5600 RD, might want to try it.
+1 Shimano is very conservative in their capacity ratings and most often their rear derailleurs will handle a cassette somewhat larger than the published limit. Try the 30T with your 5600 before buying a replacement. You will probably be pleasantly surprised.
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Old 06-16-19, 04:14 PM
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You should be able to run a 30 or even a 32 cog with your 50, 39 & 30 triple if you use this derailleur;

https://bike.shimano.com/en-EU/produ...D-4601-GS.html

the 4601-GS is backwards compatible with 105 and Ultegra. It has a generous practical cog size and chain wrap capacity.


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Old 06-16-19, 04:44 PM
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Originally Posted by HillRider View Post
+1 Shimano is very conservative in their capacity ratings and most often their rear derailleurs will handle a cassette somewhat larger than the published limit. Try the 30T with your 5600 before buying a replacement. You will probably be pleasantly surprised.
All good to know! Thank you guys for the info and encouragement. I was worried Id need to upgrade brifters as well, so good to hear!

and no issues w trying the 5600 rdr w a cs-6700 cassette?
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Old 06-16-19, 04:55 PM
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Originally Posted by mnmkpedals View Post
Hi, I usually post in the vintage forum, since my knowledge base is mostly friction shifting....


Anyway, I just bought an 2011 Specialized bike for my wife, which is original Shimano 105, 5600 series.... It is a triple in front with 10 speed maxing out at the top rated 27T in back.

I want to change the rear derailleur to a 5700 (since it is rated to 30T) and of course, then change the cassette to a same era cluster that tops out at 30T, but keeping the same hub/wheelset.

I know the 5700 RDR can handle the 30 and the total capacity, but will it work with the 5600 brifters?

I've read through old threads, and there's conflicting information.

Any experience or wisdom appreciated!!
I've done exactly this. 5600 series shifters, cgainset, front derailleur, and 5700 series rear derailleur with a 12-30 cassette. Shifts great. Better than when I was running an 11-28 cassette with the old 5600 series rear derailleur (which was technically one tooth larger than design spec).
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Old 06-16-19, 04:57 PM
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Originally Posted by shelbyfv View Post
Agreed^ Also, it's possible the 30 tooth will work with your 5600 RD, might want to try it.
Kind of doubt a 30t will work with 5600 series GS derailleur. 28t was even cutting it close without a hanger extender.
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Old 06-16-19, 06:04 PM
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Originally Posted by daoswald View Post
Kind of doubt a 30t will work with 5600 series GS derailleur. 28t was even cutting it close without a hanger extender.
Since the OP is planning to buy the cassette anyway, they have little to lose by trying, except their time.
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Old 06-16-19, 06:50 PM
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Originally Posted by daoswald View Post
Kind of doubt a 30t will work with 5600 series GS derailleur. 28t was even cutting it close without a hanger extender.
I expect tightening the B-screw a bit would have solved that problem. I have a Shimano RD-6503 (9-speed) rear derailleur also rated for a 27T maximum on one bike and it appears that snugging up the B-screw would easily allow a 28 or 30T large cog.
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