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Are there Shimano Ultegra compatible cassettes?(16 posts)

Are there Shimano Ultegra compatible cassettes?aet
Oct 16, 2001 11:26 AM
I want to get a cassette that has a bigger granny gear than a 27. a 28 or 29 maybe. don't want a triple.
Not really,TJeanloz
Oct 16, 2001 11:31 AM
The cassettes are perfectly compatible with one and other. You could get an 11-32 XT cassette and it would work except for one thing: the double (short cage) rear derailluer doesn't have the capacity for anything larger than a 27t. You could replace your rear derailluer with a mid or long cage (triple) unit.
re: Are there Shimano Ultegra compatible cassettes?jtolleson
Oct 16, 2001 11:31 AM
I have an Ultegra triple and my granny gear is a 32. I'm puzzled as to why yours is so small; sounds like you've got more of a touring setup?

I'm a little confused by the question 'cause you mention getting a different cassette. But if the only issue is your granny gear you don't need to touch your casette (rear). Just get a new small cog for your front.
Did I misunderstand your question?jtolleson
Oct 16, 2001 11:33 AM
Reading the post above (which posted at the same time as mine) it sounds like it addressed your rear cassette. But when someone says "granny gear" and "triple" I'm assuming they are talking about the third cog in front, which definitely can come bigger. I've got a 52/42/32.
I think so...aet
Oct 16, 2001 11:40 AM
i am talking about the rear. i have the regular 53/39 setup and was hoping to get something bigger than a 27 in the back, without having to go to a triple for easier climbing(cheaper)
I think so...jtolleson
Oct 16, 2001 2:46 PM
Oct 16, 2001 2:46 PM
No text! Ooops.

OK, now I've got ya!
re: Are there Shimano Ultegra compatible cassettes?Len J
Oct 16, 2001 11:48 AM
Largest that can be handles by your rear Der is a 27 I think. However, I have heard of people putting a shimano MTB rear Der on a road bike & then being able to go larger than a 27. I am not sure of compatibility issues with the STI brake levers.

This is somewhat more complicated than i expected(nm)aet
Oct 16, 2001 11:52 AM
re: Are there Shimano Ultegra compatible cassettes?Chen2
Oct 16, 2001 12:05 PM
You could go to a mtn bike rear cassette but will also require a rear mtn derailleur, they are fully compatible assuming that the drive train is all 9 speed equipment. There is a definite down-side to switching to a mtn (XT,Deore XT, XTR) set-up though. The mountain cassettes have a much wider set of ratios. There is at least a two teeth difference between adjacent cogs. The Ultegra triple rear derailleur is also limited to a 27T cog so it would not help you. My wife's bike is set up with an Ultegra triple and an XTR rear cassette, 12-34, and XTR rear derailleur. It shifts as well as the regular Ultegra triple. I'm sure that you could do the same with your double, but on flat rides you'd be missing some good cogs (13, 15, 17) that you now have with the Ultegra rear cassette. I'd think twice about going with the mountain gears unless you need them for carrying heavy loads up mountains.
Other sourcesmr_spin
Oct 16, 2001 1:14 PM
There are basically only two companies I can find that make Shimano-compatible road bike cassettes. Lots of companies make Shimano-compatible MTB cassettes, but I don't know if an MTB cassette will fit on a road hub. That would be an interesting experiment. I'll try it when I get home. In theory it should work. After all, XTR and Ultegra use the same HG-92 chain, so the spacing is the same.

If you can find a company or shop that can deal with an Italian company called Marchisio, you can literally build your own cassette by telling them what cogs you want. I haven't found anyone in the USA that carries this stuff. Some UK companies seem to. They carry all sizes from 11 to 29, but it's expensive from what I gather.

The other company is T.A. Specialties, which I believe is French. They don't make cogs bigger than 23. Lance used TA cogs on some stages in the Tour. I'm sure you'll ride like Lance if you use them too!
You need a long-cage derailleurRich Clark
Oct 16, 2001 2:01 PM
The Tiagra long-cage will shift up to a 32 (as I know because I have this on one of my bikes). I don't know if there's a long-cage model of any of the other road rears.

It doesn't matter, though, because there's no compatibility reason not to use a MTB rear derailleur. You can buy an LX for as little as $30 that will shift a 9-speed cassette up to 11/34.

It will work fine with STI shifters. I have an XTR RD on my Airborne with an 11-32 cassette and Ultegra levers.

re: Are there Shimano Ultegra compatible cassettes?davet
Oct 16, 2001 4:56 PM
I have a Dura Ace equipped bike and had a very hard time hauling my 60 year-old legs up some of the large hills here in eastern Washington. On advice of a well respected bike shop I had installed a Shimano XTrear derailluer and an XT 11-32 cassette. The cost was relatively small and the benefits to me were enormous. I like to do distance rides and hard repetitive hill climbing were really putting the hurts on me. With the new set-up the hills are much easier and I can do my century rides and not feel like it's the end of the world.
The perfect hill climbing cassetteSkunkWorks
Oct 16, 2001 5:16 PM
What I really wanted is not really made, so I made one myself. I wanted a 28 and 32 for the really tough hills, and still have the close ratio gears on the flats 13, 14, 15, 17, 19, 21, 23, so I merged a few cassettes together.

I took a 11-32 LX cassette (any cassette without an alloy carrier will work) and drilled out the heads of the rivets from the smaller cog side, and then pried off the cogs till only the 28 and 32 were left tied together. Cut off the excess rivet material and pound any remaining rivet material flat.

Now take a 11-23 good quality cassette (I used Ultegra) and discard the 11,12,and 13 cogs. I used a old 13 cog with an attached spacer and the divets that hold the lock ring as the last cog so that it will lock onto the hub properly.

You are left with the close ratio 13-23 gears, plus bailout 28 and 32 gears that flatten those really steep hills. I was worried that the jump from 23 to 28 would be harse, but it seems to work pretty smooth. Most road rear deraileurs can't handle the 32, so get a MTB type if you want to go beyond 28.

I also have a bike with a triple crankset, but it does not shift as smooth as a double with the custom cassette and is less likly to drop a chain trying to get on the the small ring. It also puts the 23 or even 28 in a better chainline so that you can stay on your larger chainring for those short rollers that would normally make you change to your small ring and then back to the large ring at the top.

The only downside is that you loose your 11 and 12 cogs, but you could also take out the 13 and put on a 12 instead, and a 13 with an attached spacer is pretty hard to find, so you might use the 12 to save some money anyway.
The perfect hill climbing cassetteChen2
Oct 17, 2001 6:21 AM
This sounds like a great idea. I don't know why Shimano doesn't offer cassettes like this, they seem to be set on marketing what they think will sell, like what the pro's use. How many of us really need an 11, or even a 12. I would like to be able to buy the gearing I really need, not what Lance uses. Campagnolo does a better job of offering optional realistic gear ratios. I also agree with your comment about doubles shifting better than triples, that's why I have a double, it's not about being macho or trying to look like a stud, it is about what works best. My hat's off to your innovatative spirit.
re: Are there Shimano Ultegra compatible cassettes?aet
Oct 17, 2001 8:37 AM
guess i'll go with the cassette with a 27 and see how that does.