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max sprocket on ultegra 10 speed

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max sprocket on ultegra 10 speed

Old 06-02-17, 08:43 PM
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8speed
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max sprocket on ultegra 10 speed

I have a well maintained bike with full ultegra 6600 10 speed groupset. I'm at the age where i need extra help with big climbing days so my 11-28 cassette with 53/39 is not low enough.

I believe that changing to a 6700 (short cage) rear derailleur will mean i can comfortably fit a 30t rear sprocket, but i'd like to get even lower. Has anyone successfully fitted a 32 rear sprocket with a 6700 short cage derailleur and 53/39. I'd like to know if this is safely doable (including being able to accomodate accidental big chainring to big sprocket shifts without breaking).

thanks
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Old 06-02-17, 08:47 PM
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With a 6700-GS mid-cage, maybe. NO way with a 6700-SS.
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Old 06-03-17, 07:09 AM
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The max usable cog size is very dependent on derailleur hanger configuration. sometimes you just have to try it. You didn't mention wanting other solutions but a 50-34 crankset would not be much more expensive than a new derailleur and cassette. You may not often need your 53-11 gearing.
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Old 06-03-17, 07:55 AM
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I have a similar situation with a new (to me) bike with the same components. I am going to try the 50/34 approach shelbyfv suggested. Currently Ribble is selling the silver 5800 105 50/34 crankset for about $70. Not Ultegra,but hard to beat the price to give it a try. Some folks have had success with the Ultegra 12/30 cassette on the short cage RD but that would not provide much benefit with the 53/39 chain ring.
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Old 06-03-17, 08:26 AM
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Nine speed shimano mountain components are compatible with 10 speed road. I have two bikes with 10sp Ultegra brifters and 9 speed XT mid cage rear derailleurs. This lets me run the Ultegra 50-34 up front with a 11-34 in the back, and I understand that most bikes can take a 36 tooth cassette. The XT is officially rated for 34 max cog.

The 9 speed XT comes in standard and "shadow" configurations.

This setup works flawlessly.
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Old 06-03-17, 09:07 AM
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As far as I know the previous Tiagra 4600 GS is compatible with older Ultegra stuff and it takes a 30 cassette officially. If you get a compact 34/50 as well you may be low enough?
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Old 06-03-17, 09:14 AM
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Originally Posted by aggiegrads View Post
Nine speed shimano mountain components are compatible with 10 speed road. I have two bikes with 10sp Ultegra brifters and 9 speed XT mid cage rear derailleurs. This lets me run the Ultegra 50-34 up front with a 11-34 in the back, and I understand that most bikes can take a 36 tooth cassette. The XT is officially rated for 34 max cog.

The 9 speed XT comes in standard and "shadow" configurations.

This setup works flawlessly.
Good stuff. Thanks!
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Old 06-03-17, 09:25 PM
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Good info all - thanks very much!
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Old 06-03-17, 09:45 PM
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Along this same line, is it possible to swap out just the cage from an SS to a GS on a Shimano road RD in order to accommodate a wider range cassette? Specifically, I have an Ultegra 50/34 crank, a Dura-Ace 7800 RD (short cage), and a 11/28 cassette but would like to go to a 11/32 if a cage swap is not too difficult. If that can't be done would my drive train allow for a 12/30 without any other changes?
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Old 06-03-17, 09:49 PM
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With no wrap up, just 1 chainring , you can stretch the capacity.

I've done so, long ago, with an 80s short cage Chorus. 13~34t
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Old 06-04-17, 05:44 AM
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Zip- I use 12-30 on two bikes. One of them is good with the 7800 rear derailleur, the other was not. Largest cog bumped the top pulley. Works fine with a 7900. You just have to try it. Changing the cage would give more chain wrap but may not increase large cog clearance.
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Old 06-04-17, 08:23 AM
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Originally Posted by zip View Post
Along this same line, is it possible to swap out just the cage from an SS to a GS on a Shimano road RD in order to accommodate a wider range cassette? Specifically, I have an Ultegra 50/34 crank, a Dura-Ace 7800 RD (short cage), and a 11/28 cassette but would like to go to a 11/32 if a cage swap is not too difficult. If that can't be done would my drive train allow for a 12/30 without any other changes?
It will help with chain wrap, but will have very little impact on getting the jockey pulley away from the large cog. If you are married to a road derailleur, the Wolf Tooth road link is likely the solution that you are looking for. This gets the entire derailleur lower to accommodate a wider range cassette.

I went with the shadow version of the XT to get the RD out of harm's way.
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Old 06-04-17, 08:59 AM
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Fit a Wolftooth Road link. It's a gear hanger extender so you can fit a bigger cassette but it allows you to keep your short cage RD.

Wolf Tooth Roadlink > Components > Frames > Hangers & Dropouts | Jenson USA
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Old 06-04-17, 06:13 PM
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Originally Posted by aggiegrads View Post
Nine speed shimano mountain components are compatible with 10 speed road. I have two bikes with 10sp Ultegra brifters and 9 speed XT mid cage rear derailleurs. This lets me run the Ultegra 50-34 up front with a 11-34 in the back, and I understand that most bikes can take a 36 tooth cassette. The XT is officially rated for 34 max cog.

The 9 speed XT comes in standard and "shadow" configurations.

This setup works flawlessly.
I use a similar setup on my touring bike, that has a 42-32-22 triple and 11-36 cassette with 10 speed 105 shifters, I also use this setup with 50-39-26 crank. It works great.
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Old 06-04-17, 09:39 PM
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Thanks for the help.
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Old 06-04-17, 09:48 PM
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I have run a 50/34 11/32 with an Ultegra 6700 derailleur. Make sure the 6700 mech is the latest model stamped 30T and use a properly sized chain.
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Old 06-04-17, 09:51 PM
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https://www.wolftoothcomponents.com/products/roadlink
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