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Maximum cassette size for Ultegra Triple Rear Derailleur(12 posts)

Maximum cassette size for Ultegra Triple Rear Derailleurwinstonc
Jun 19, 2003 10:03 AM
I'm planning on doing some loaded touring and I want to lower the gearing on my bike... anyone know what the largest cassette size is that I can use with my Ultegra triple rear derailleur?
27 (nm)VW
Jun 19, 2003 10:24 AM
re: Maximum cassette size for Ultegra Triple Rear DerailleurChen2
Jun 19, 2003 10:24 AM
The cog size limit is the same as the rear derailleur for the double. The difference between the triple and double is the available chain-wrap (capacity). Shimano says the maximum cog size is 27. Many folks have reported going up to a 30 on the road derailleurs. I put a 14-28 9-speed on my wife's Ultegra triple without changing anything else. It works great. Suggest you check with
I've seen 30. But shifting is not perfect.PeterRider
Jun 19, 2003 10:37 AM
Personally, when I want low gears I switch to a XT derailleur and a 11-32 XT cassette (there is even 11-34). This is not very expensive, you can buy derailleur for around 30$ and cassette for about 30$ as well.

I agree with Pierre, use an XTRickC5
Jun 20, 2003 5:33 AM
Totally compatible with the rest of a Shimano 9-spd drivetrain, and not very costly if you buy online, like $35-40. Cost of an XT cassette is also relatively low, like $34. You'll need a new chain too.

My wife has an XT rear drlr and cassette on her Trek road bike. Gives her lower gears at minimal cost. She still uses the Dura-Ace double crank.
I agree with Pierre, use an XTmgolebiewski
Jun 20, 2003 12:39 PM
Why the need for a new chain. I was pretty certain that 9 speed and 9 speed mountin were all the same.
The length of the chain is determined...PeterRider
Jun 20, 2003 3:03 PM
... by large chainring and large cog combination. If your chain is too short, you can damage your derailleur. I think the difference between a 12-27 cassette and a 11-32 is one (double) link.

And yes, this is the same chain, so you can just add links to your existing chain.

re: Maximum cassette size for Ultegra Triple Rear Derailleurbcm119
Jun 19, 2003 11:05 AM
I've done this with my 105 triple set up. I used an 11-28 cassette and it worked fine for touring.
27 according to Shimano, but 28 should workLC
Jun 19, 2003 1:52 PM
Never had any luck going bigger than 28 though.
re: 30t, butcyclopathic
Jun 19, 2003 4:38 PM
it may take time to set up and you might need longer B-screw. No problems with 28
I run 34T with Ultegra triple on my cross bikeTony Montana
Jun 20, 2003 2:10 PM
I use a bit longer B screw as one of the other posters mentioned. It makes a bit of noise in some of the granny ring combos, but work flawlessly. I've put 3000+ miles on it with no drivetrain issues. Several buddies of mine run the same combo and haven't had any issues.
With Ultegra triple rear derailleur?? (nm)Chen2
Jun 20, 2003 6:41 PM