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Can I use a 11-23 11-speed Shimano cassette with the RD-R8000 11-speed Ultegra Shadow rear derailleur (short cage)?

Changing from Shimano Road Double Chainset to Triple Chainset?Can I change my 7-speed rear derailleur to an 8-speed?Major Problem: 135mm rear spacing road touring frame with shimano 5800 11 speed cassette?Can I use Shimano STI brifter with 11 speed mountain derailleur?Can I partially upgrade from Shimano Sora to Ultegra 6800?Is Ultegra 6800 GS compatible with an HG800 11 speed 11-34 cassette?Run a Shimano STX derailleur with 8 speed cassette or bigger?Will Shimano M6000 Rear Derailleur SG (medium cage) work with cassette other then 42t?Ultegra 6800 shifter with R8000 rear derailleur?Ultegra 2X cranks with M8000 group and 11-42t cassette?

2

I would like to know whether I can use a 11-23 11-speed shimano cassette with the RD-R8000 11-speed Ultegra Shadow Rear Derailleur (short cage).

I ask this question because I see the new 11-speed Shimano cassettes no longer come in a 11-23 gearing.

Looking forward to your comments.

Thanks

shimano

share|improve this question

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

asked May 8 at 21:58

AlejandroAlejandro

132

add a comment | 

2

I would like to know whether I can use a 11-23 11-speed shimano cassette with the RD-R8000 11-speed Ultegra Shadow Rear Derailleur (short cage).

I ask this question because I see the new 11-speed Shimano cassettes no longer come in a 11-23 gearing.

Looking forward to your comments.

Thanks

shimano

share|improve this question

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

asked May 8 at 21:58

AlejandroAlejandro

132

add a comment | 

I would like to know whether I can use a 11-23 11-speed shimano cassette with the RD-R8000 11-speed Ultegra Shadow Rear Derailleur (short cage).

I ask this question because I see the new 11-speed Shimano cassettes no longer come in a 11-23 gearing.

Looking forward to your comments.

Thanks

shimano

share|improve this question

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

asked May 8 at 21:58

AlejandroAlejandro

132

share|improve this question

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

asked May 8 at 21:58

AlejandroAlejandro

132

share|improve this question

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

asked May 8 at 21:58

AlejandroAlejandro

132

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

edited May 9 at 20:57

Argenti Apparatus

40.6k343100

asked May 8 at 21:58

AlejandroAlejandro

132

asked May 8 at 21:58

AlejandroAlejandro

132

2 Answers
2

active

oldest

votes

3

No, not according to Shimano, anyway. The Shimano specs pages are here, and this is the road rear derailleur page.

The specified RD-R8000-SS minimum low sprocket size is 25 teeth.

share|improve this answer

edited May 8 at 22:30

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  FWIW, my 2018 Fuji Transonic 2.3, with an RD-R8000 works just fine with an 11-23. Makes for a nice trainer cassette, too.
  
  – Andrew Henle
  May 8 at 22:23
  

  
  
  
  

add a comment | 

6

Probably you'll be just fine, although it's technically outside the spec'd range.

Per the Shimano 2019-2020 Products compatibility Information document (warning: PDF link), the RD-R8000 rear derailleur is compatible with all of the following cassettes:

CS-R9100
CS-9000
CS-6800
CS-5800
CS-R8000
CS-HG800-11
CS-R7000
CS-HG700-11

As far as I know, that covers all of Shimano's 11-speed road cassettes, and I'm assuming Shimano doesn't produce an 11-23 MTB cassette.

BUT

The RD-R8000 is spec'd as

 RD-R8000-SS
(25T≤CS Low gear≤30T)

(the GS is similary spec'd with a 28T minimum)

so a 23-tooth sprocket would be slightly too small per Shimano's specs.

But it should work for you as Shimano's spec's are notoriously tight - and I already do have an 11-23 on a bike with an RD-8000-SS and it works fine with an 11-23. (I didn't even know it wasn't "in spec"...)

The page the info was extracted from:

share|improve this answer

edited May 9 at 13:18

Lamar Latrell

212110

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  28T minimum? Are you sure? The minimum is usually 11T for Shimano RD but for short cage, MAXimum is 28T, for middle cage (they existed) it was 32T and for long cage it is 34T Road derailleurs. In the 11-28 cassette there's a 23 so why should 11-23 not be compatible?
  
  – Carel
  May 9 at 13:03
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carel On page 17 of the PDF linked, both the RD-R9100-SS and RD-R8000-SS are spec'd as "(25T≤CS Low gear≤30T)", while the RD-9000, RD-R8000-GS, and RD-RX800-GS are spec'd as "(28T≤CS Low gear≤34T)" So for SS short cage, the latest 11-speed rear derailleurs are not spec'd to work with any cassette with a large sprocket smaller than 25t, and the long-cage GS derailleurs are not spec'd to work with a cassette that has a large sprocket smaller than 28t. Will they work in reality? Probably, and probably quite well. But the specs are clear.
  
  – Andrew Henle
  May 9 at 13:13
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carel (cont) The RD-8000-SS page has both "Low sprocket_Max. 30T" and "Low sprocket_Min. 25T". Seems crazy, but that's what Shimano says.
  
  – Andrew Henle
  May 9 at 13:15
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Andrew Henle Thanks for your answer!!! very, VERY enlightening!
  
  – Alejandro
  May 9 at 14:33
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Shimano says many strange things in their data sheets. I've been running for two years and over 10.000km with UltegraDi2 with a 52-34 front without trouble (you shouldn't according to S.) and various rear cassettes 11-25, 11-28, 11-32. I'd try an 11-23 if I had one. Chainlife >3000km. I'd say their datasheets are ultra-cautious.
  
  – Carel
  May 10 at 19:34
  
  

  
  
  
  

 | 
show 1 more comment

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3

No, not according to Shimano, anyway. The Shimano specs pages are here, and this is the road rear derailleur page.

The specified RD-R8000-SS minimum low sprocket size is 25 teeth.

share|improve this answer

edited May 8 at 22:30

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  FWIW, my 2018 Fuji Transonic 2.3, with an RD-R8000 works just fine with an 11-23. Makes for a nice trainer cassette, too.
  
  – Andrew Henle
  May 8 at 22:23
  

  
  
  
  

add a comment | 

3

No, not according to Shimano, anyway. The Shimano specs pages are here, and this is the road rear derailleur page.

The specified RD-R8000-SS minimum low sprocket size is 25 teeth.

share|improve this answer

edited May 8 at 22:30

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  FWIW, my 2018 Fuji Transonic 2.3, with an RD-R8000 works just fine with an 11-23. Makes for a nice trainer cassette, too.
  
  – Andrew Henle
  May 8 at 22:23
  

  
  
  
  

add a comment | 

No, not according to Shimano, anyway. The Shimano specs pages are here, and this is the road rear derailleur page.

The specified RD-R8000-SS minimum low sprocket size is 25 teeth.

share|improve this answer

edited May 8 at 22:30

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

share|improve this answer

edited May 8 at 22:30

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

answered May 8 at 22:16

Argenti ApparatusArgenti Apparatus

40.6k343100

6

Probably you'll be just fine, although it's technically outside the spec'd range.

Per the Shimano 2019-2020 Products compatibility Information document (warning: PDF link), the RD-R8000 rear derailleur is compatible with all of the following cassettes:

CS-R9100
CS-9000
CS-6800
CS-5800
CS-R8000
CS-HG800-11
CS-R7000
CS-HG700-11

As far as I know, that covers all of Shimano's 11-speed road cassettes, and I'm assuming Shimano doesn't produce an 11-23 MTB cassette.

BUT

The RD-R8000 is spec'd as

 RD-R8000-SS
(25T≤CS Low gear≤30T)

(the GS is similary spec'd with a 28T minimum)

so a 23-tooth sprocket would be slightly too small per Shimano's specs.

But it should work for you as Shimano's spec's are notoriously tight - and I already do have an 11-23 on a bike with an RD-8000-SS and it works fine with an 11-23. (I didn't even know it wasn't "in spec"...)

The page the info was extracted from:

share|improve this answer

edited May 9 at 13:18

Lamar Latrell

212110

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  28T minimum? Are you sure? The minimum is usually 11T for Shimano RD but for short cage, MAXimum is 28T, for middle cage (they existed) it was 32T and for long cage it is 34T Road derailleurs. In the 11-28 cassette there's a 23 so why should 11-23 not be compatible?
  
  – Carel
  May 9 at 13:03
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carel On page 17 of the PDF linked, both the RD-R9100-SS and RD-R8000-SS are spec'd as "(25T≤CS Low gear≤30T)", while the RD-9000, RD-R8000-GS, and RD-RX800-GS are spec'd as "(28T≤CS Low gear≤34T)" So for SS short cage, the latest 11-speed rear derailleurs are not spec'd to work with any cassette with a large sprocket smaller than 25t, and the long-cage GS derailleurs are not spec'd to work with a cassette that has a large sprocket smaller than 28t. Will they work in reality? Probably, and probably quite well. But the specs are clear.
  
  – Andrew Henle
  May 9 at 13:13
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carel (cont) The RD-8000-SS page has both "Low sprocket_Max. 30T" and "Low sprocket_Min. 25T". Seems crazy, but that's what Shimano says.
  
  – Andrew Henle
  May 9 at 13:15
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Andrew Henle Thanks for your answer!!! very, VERY enlightening!
  
  – Alejandro
  May 9 at 14:33
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Shimano says many strange things in their data sheets. I've been running for two years and over 10.000km with UltegraDi2 with a 52-34 front without trouble (you shouldn't according to S.) and various rear cassettes 11-25, 11-28, 11-32. I'd try an 11-23 if I had one. Chainlife >3000km. I'd say their datasheets are ultra-cautious.
  
  – Carel
  May 10 at 19:34
  
  

  
  
  
  

 | 
show 1 more comment

6

Probably you'll be just fine, although it's technically outside the spec'd range.

Per the Shimano 2019-2020 Products compatibility Information document (warning: PDF link), the RD-R8000 rear derailleur is compatible with all of the following cassettes:

CS-R9100
CS-9000
CS-6800
CS-5800
CS-R8000
CS-HG800-11
CS-R7000
CS-HG700-11

As far as I know, that covers all of Shimano's 11-speed road cassettes, and I'm assuming Shimano doesn't produce an 11-23 MTB cassette.

BUT

The RD-R8000 is spec'd as

 RD-R8000-SS
(25T≤CS Low gear≤30T)

(the GS is similary spec'd with a 28T minimum)

so a 23-tooth sprocket would be slightly too small per Shimano's specs.

But it should work for you as Shimano's spec's are notoriously tight - and I already do have an 11-23 on a bike with an RD-8000-SS and it works fine with an 11-23. (I didn't even know it wasn't "in spec"...)

The page the info was extracted from:

share|improve this answer

edited May 9 at 13:18

Lamar Latrell

212110

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  28T minimum? Are you sure? The minimum is usually 11T for Shimano RD but for short cage, MAXimum is 28T, for middle cage (they existed) it was 32T and for long cage it is 34T Road derailleurs. In the 11-28 cassette there's a 23 so why should 11-23 not be compatible?
  
  – Carel
  May 9 at 13:03
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carel On page 17 of the PDF linked, both the RD-R9100-SS and RD-R8000-SS are spec'd as "(25T≤CS Low gear≤30T)", while the RD-9000, RD-R8000-GS, and RD-RX800-GS are spec'd as "(28T≤CS Low gear≤34T)" So for SS short cage, the latest 11-speed rear derailleurs are not spec'd to work with any cassette with a large sprocket smaller than 25t, and the long-cage GS derailleurs are not spec'd to work with a cassette that has a large sprocket smaller than 28t. Will they work in reality? Probably, and probably quite well. But the specs are clear.
  
  – Andrew Henle
  May 9 at 13:13
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Carel (cont) The RD-8000-SS page has both "Low sprocket_Max. 30T" and "Low sprocket_Min. 25T". Seems crazy, but that's what Shimano says.
  
  – Andrew Henle
  May 9 at 13:15
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Andrew Henle Thanks for your answer!!! very, VERY enlightening!
  
  – Alejandro
  May 9 at 14:33
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Shimano says many strange things in their data sheets. I've been running for two years and over 10.000km with UltegraDi2 with a 52-34 front without trouble (you shouldn't according to S.) and various rear cassettes 11-25, 11-28, 11-32. I'd try an 11-23 if I had one. Chainlife >3000km. I'd say their datasheets are ultra-cautious.
  
  – Carel
  May 10 at 19:34
  
  

  
  
  
  

 | 
show 1 more comment

Probably you'll be just fine, although it's technically outside the spec'd range.

Per the Shimano 2019-2020 Products compatibility Information document (warning: PDF link), the RD-R8000 rear derailleur is compatible with all of the following cassettes:

CS-R9100
CS-9000
CS-6800
CS-5800
CS-R8000
CS-HG800-11
CS-R7000
CS-HG700-11

As far as I know, that covers all of Shimano's 11-speed road cassettes, and I'm assuming Shimano doesn't produce an 11-23 MTB cassette.

BUT

The RD-R8000 is spec'd as

 RD-R8000-SS
(25T≤CS Low gear≤30T)

(the GS is similary spec'd with a 28T minimum)

so a 23-tooth sprocket would be slightly too small per Shimano's specs.

But it should work for you as Shimano's spec's are notoriously tight - and I already do have an 11-23 on a bike with an RD-8000-SS and it works fine with an 11-23. (I didn't even know it wasn't "in spec"...)

The page the info was extracted from:

share|improve this answer

edited May 9 at 13:18

Lamar Latrell

212110

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915

CS-R9100
CS-9000
CS-6800
CS-5800
CS-R8000
CS-HG800-11
CS-R7000
CS-HG700-11

 RD-R8000-SS
(25T≤CS Low gear≤30T)

share|improve this answer

edited May 9 at 13:18

Lamar Latrell

212110

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915

edited May 9 at 13:18

Lamar Latrell

212110

edited May 9 at 13:18

Lamar Latrell

212110

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915

answered May 8 at 22:12

Andrew HenleAndrew Henle

3,386915