IRD's 10-speed on Ultegra RD-6600-GS
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IRD's 10-speed on Ultegra RD-6600-GS
re: https://www.interlocracing.com/cassettes_steel.html
I did not get a response from IRD so I figured I'd get responses from 'bike mechanics!'
I would like to achieve lower gearing, if possible, to deal with aging knees and Seattle-environ's steeper hills.
I've read the information on your site but still have questions since there is reference
to "mountain bike components" that can handle your wider ranging cassettes while I have ROAD components.
I have a Shimano Ultegra triple crank: Hollowtech II Crankset FC-6603
I have a Shimano Ultegra 10-speed rear derailleur (12-27T) that tops out with a rear cog of 27.
It is: Rear Derailleur RD-6600-GS.
According to Shimano's specifications it will handle:
Max. Sprocket 27T
Min. Sprocket 11T
Max Front Difference. 23T
Total Capacity 38T
I am considering your 11-32T or 12-32T cassettes for Shimano if that
would work. I understand that Shimano is conservative in their
specifications and believe it can be upgraded???
I already have another, older road bike with 24-42-52 and
12 14 16 18 21 24 28 32 gearing and know it will be SLOW (and wobbly)
on steep climbs which is fine.
Thanks in advance
I did not get a response from IRD so I figured I'd get responses from 'bike mechanics!'
I would like to achieve lower gearing, if possible, to deal with aging knees and Seattle-environ's steeper hills.
I've read the information on your site but still have questions since there is reference
to "mountain bike components" that can handle your wider ranging cassettes while I have ROAD components.
I have a Shimano Ultegra triple crank: Hollowtech II Crankset FC-6603
I have a Shimano Ultegra 10-speed rear derailleur (12-27T) that tops out with a rear cog of 27.
It is: Rear Derailleur RD-6600-GS.
According to Shimano's specifications it will handle:
Max. Sprocket 27T
Min. Sprocket 11T
Max Front Difference. 23T
Total Capacity 38T
I am considering your 11-32T or 12-32T cassettes for Shimano if that
would work. I understand that Shimano is conservative in their
specifications and believe it can be upgraded???
I already have another, older road bike with 24-42-52 and
12 14 16 18 21 24 28 32 gearing and know it will be SLOW (and wobbly)
on steep climbs which is fine.
Thanks in advance
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Originally Posted by kahn
re: https://www.interlocracing.com/cassettes_steel.html
I would like to achieve lower gearing...
I've read the information on your site but still have questions since there is reference
to "mountain bike components" that can handle your wider ranging cassettes while I have ROAD components.
I have a Shimano Ultegra 10-speed rear derailleur (12-27T) that tops out with a rear cog of 27.
According to Shimano's specifications it will handle:
Max. Sprocket 27T
I am considering your 11-32T or 12-32T cassettes for Shimano if that
would work. I understand that Shimano is conservative in their
specifications and believe it can be upgraded???
I would like to achieve lower gearing...
I've read the information on your site but still have questions since there is reference
to "mountain bike components" that can handle your wider ranging cassettes while I have ROAD components.
I have a Shimano Ultegra 10-speed rear derailleur (12-27T) that tops out with a rear cog of 27.
According to Shimano's specifications it will handle:
Max. Sprocket 27T
I am considering your 11-32T or 12-32T cassettes for Shimano if that
would work. I understand that Shimano is conservative in their
specifications and believe it can be upgraded???
However, generally, 30 is as big as these can handle. Your present derailer is very unlikely to be able to handle a 32.
Fortunately, derailers are cheap, considerably cheaper than cassettes, in fact!
You need one of the models with the long "SGS" cage, such as a Deore, LX, or XT. (XT is "Ultegra level" if you're hung up on the snob value issue.)
Shimano's marketeers call wide-range derailers "mountain" parts, but that's just marketing talk. Wide-range derailers were formerly called "touring" equipment, but the marketeers retired "touring" as a buzzword in the late 1980s.
Sheldon "SGS" Brown
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According to Shimano specs your 10-speed Ultegra triple has 52-39-30 chainrings. One alternative is to replace the 30 with a 28, or possibly a 26 but I would worry about shifting performance with a 26.
A custom 13-28 or 13-30 10-speed cassette is another good alternative, but running a 30 cog may take some derailleur tweaking.
Al
A custom 13-28 or 13-30 10-speed cassette is another good alternative, but running a 30 cog may take some derailleur tweaking.
Al
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Originally Posted by Sheldon Brown
Shimano is conservative, and we routinely sell cassettes with 30 tooth sprockets for use with Shimano's so-called "road" derailers.
However, generally, 30 is as big as these can handle. Your present derailer is very unlikely to be able to handle a 32.
You need one of the models with the long "SGS" cage, such as a Deore, LX, or XT. (XT is "Ultegra level" if you're hung up on the snob value issue.)
Shimano's marketeers call wide-range derailers "mountain" parts, but that's just marketing talk. Wide-range derailers were formerly called "touring" equipment, but the marketeers retired "touring" as a buzzword in the late 1980s.
Sheldon "SGS" Brown
[/CODE]
However, generally, 30 is as big as these can handle. Your present derailer is very unlikely to be able to handle a 32.
You need one of the models with the long "SGS" cage, such as a Deore, LX, or XT. (XT is "Ultegra level" if you're hung up on the snob value issue.)
Shimano's marketeers call wide-range derailers "mountain" parts, but that's just marketing talk. Wide-range derailers were formerly called "touring" equipment, but the marketeers retired "touring" as a buzzword in the late 1980s.
Sheldon "SGS" Brown
[/CODE]
30 may be more than enough (this year!) I shall plug a 30 into my equation and see what pops up or maybe down.
Regarding the long "SGS" cage models, do I recall that Shimano has some kind of "reverse" spring action on their newer ones? That is, am I looking for any particular one? Oh, yes, and this is TEN speed, so will that make a difference?
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Originally Posted by Al1943
According to Shimano specs your 10-speed Ultegra triple has 52-39-30 chainrings. One alternative is to replace the 30 with a 28, or possibly a 26 but I would worry about shifting performance with a 26.
A custom 13-28 or 13-30 10-speed cassette is another good alternative, but running a 30 cog may take some derailleur tweaking.
Al
A custom 13-28 or 13-30 10-speed cassette is another good alternative, but running a 30 cog may take some derailleur tweaking.
Al
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Originally Posted by rmac
Do you know where you can buy a custom 10sp 13-30 cassette or even who makes a 10sp 30 cog?
Al
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In addition to the link in my original message to IRD, there is also
https://www.cycle-dynamics.com/ - A Canadian outfit with pricy titanium cassettes.
https://www.cycle-dynamics.com/ - A Canadian outfit with pricy titanium cassettes.
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Originally Posted by Al1943
Haven't researched that, but there shouldn't be any problem running a generic 30 cog on a 10-speed cassette as long as it is spaced for a 10-speed. A small extra thickness for one cog at the end of the stack shouldn't hurt anything. The larger diameter cog diameter is more of an issue. This might require an extra long "B" screw.
Al
Al
Last edited by rmac; 03-21-07 at 07:16 PM.
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Originally Posted by kahn
First, THANKS for answering.
30 may be more than enough (this year!) I shall plug a 30 into my equation and see what pops up or maybe down.
Regarding the long "SGS" cage models, do I recall that Shimano has some kind of "reverse" spring action on their newer ones? That is, am I looking for any particular one? Oh, yes, and this is TEN speed, so will that make a difference?
30 may be more than enough (this year!) I shall plug a 30 into my equation and see what pops up or maybe down.
Regarding the long "SGS" cage models, do I recall that Shimano has some kind of "reverse" spring action on their newer ones? That is, am I looking for any particular one? Oh, yes, and this is TEN speed, so will that make a difference?
The better Shimano SGS derailers are "low normal" ("reverse action" a.k.a. "RapidRise.")
I bought an XT to replace the stock Ultegra that came on my Raleigh Cadent 4.0. I don't have a wide cassette on that bike, just the stock 12-25.
I swapped the derailer not because I needed the range. I did it because I wanted the improved downshifting of the low-normal design, and because it made it less confusing going back and forth between my two Campagnolo Ergo equipped bikes and the Shimano equipped Raleigh.
Sheldon "Low Normal" Brown
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Originally Posted by Al1943
According to Shimano specs your 10-speed Ultegra triple has 52-39-30 chainrings. One alternative is to replace the 30 with a 28, or possibly a 26 but I would worry about shifting performance with a 26.
One advantage is that a 26T chainring is a lot cheaper than either a new cassette or a new rear derailleur.
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Originally Posted by Sheldon Brown
Shimano is conservative, and we routinely sell cassettes with 30 tooth sprockets for use with Shimano's so-called "road" derailers.
However, generally, 30 is as big as these can handle. Your present derailer is very unlikely to be able to handle a 32.
However, generally, 30 is as big as these can handle. Your present derailer is very unlikely to be able to handle a 32.
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Originally Posted by serpico7
I'm considering going with your 13-30 Century Special 9sp with my Ultegra 6600 10sp groupset. Will the alternate cable routing on your site make the 10sp shifter play well with the 9sp cassette?
Sheldon "Terse" Brown
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Originally Posted by Sheldon Brown
Yep.
Sheldon "Terse" Brown
Sheldon "Terse" Brown
Copied from email:
------------------------------------------------------------------------------------
Can I use any of these[list of cassettes, including the 13-30 Century Special] with my existing Ultegra 6600 rear derailleur?
No, since it's probably a short cage model.
If I use a 9sp cassette, will using the “alternate cable routing” that Sheldon describes here (https://sheldonbrown.com/derailer-adj...html#alternate) allow for crisp shifting?
No. That method is not accurate enough. The better solution would be a JTek adapter.
------------------------------------------------------------------------------------
Measuring center to center on the jockey wheels, my derailleur is 5cm. I'm guessing this is considered short (and not medium) cage?
From the Harris site: "The "Century Special" is our most popular custom cassette. It works with all modern derailers, even short cage models."
So it would seem the Harris rep is contradicting both the site (in terms of whether the Century Special is compatible with short cage RDs) and Sheldon (in terms of whether the alternate cable routing produces accurate shifting). If it matters, and I don't think it does except in terms of wrap, I am using a 50/34 crank.
Thanks for all the informative articles on your website, Sheldon.
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Originally Posted by serpico7
I emailed one of your colleagues at Harris earlier about moving to lower gearing, and received answers that don't agree with some of the stuff you've written. Hoping you can provide some clarification.
Copied from email:...
Copied from email:...
Sheldon "It Works" Brown
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Originally Posted by Sheldon Brown
Who was the email from? I'll set him straight.
Sheldon "It Works" Brown
Sheldon "It Works" Brown
So you think the 13-30 Century Special will work with my short cage Ultegra derailleur? I don't think chain wrap will be an issue, because I only need to wrap 33t with this setup (50-34)+(30-13), and from one of your articles, I gather that an Ultegra short cage mech can wrap up to 36t. So the real rear mech issue is whether it can accomodate a 30t cog.
And the 10 speed shifter with the 9sp cassette will give crisp shifting (as opposed to merely serviceable shifting) using the alternate cable routing?
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Originally Posted by serpico7
Sheldon, I sent you an email with the exchange I had with a Harris rep; it includes his name (figured there was no reason to name him on this msg board). If for some reason, it doesn't come through, send me a PM, and I'll resend.
So you think the 13-30 Century Special will work with my short cage Ultegra derailleur? I don't think chain wrap will be an issue, because I only need to wrap 33t with this setup (50-34)+(30-13), and from one of your articles, I gather that an Ultegra short cage mech can wrap up to 36t. So the real rear mech issue is whether it can accomodate a 30t cog.
And the 10 speed shifter with the 9sp cassette will give crisp shifting (as opposed to merely serviceable shifting) using the alternate cable routing?
So you think the 13-30 Century Special will work with my short cage Ultegra derailleur? I don't think chain wrap will be an issue, because I only need to wrap 33t with this setup (50-34)+(30-13), and from one of your articles, I gather that an Ultegra short cage mech can wrap up to 36t. So the real rear mech issue is whether it can accomodate a 30t cog.
And the 10 speed shifter with the 9sp cassette will give crisp shifting (as opposed to merely serviceable shifting) using the alternate cable routing?
See: https://sheldonbrown.com/capacity
In almost all cases it works fine with any Shimano derailer. In a very few cases, where the geometry of the frame's derailer hanger is non-standard, we have had to upgrade to a wide range ("mountain") rear derailer, but it is quite unusual to need to do this. Fortunately, suitable derailers are not expensive.
You will need a new chain as well. (You should always replace the chain when installing a new cassette in any case.) I recommend the SRAM PC59.* https://harriscyclery.com/chains
I've used the alternate cable routing with a 9-speed cassette on my Raleigh Cadent 4.0 (Ultegra 10) and it worked fine.
Sheldon "Compatibility" Brown
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