The only real difference between the short and medium cages for the road groups are their ability to handle double or triple chainsets. If you plan on using a double (either standard 53/39 or a compact such as 50/34) then a short cage will work fine. If you ever need to use a triple chainset then you would at least need a medium cage 105 or ultegra. If you wanted to run a cassette with more than 28 teeth then you'll need something like a Deore long cage. The latest dura ace, ultegra and 105 offer a 28 tooth rear, the prior versions only do a 27. Shimano say the slightly older rear mech such as the 6600 ultegra will not handle the 28... But in the real world it'll probably work fine.biserker1 said:Thanks for all this info!
My bike currently has 12 - 27 back cog with a medium rear DR. All Shimano 105 with a compact crank 50/34. My shifters are Shimano Ultegra. I thought about taking the cog, chain, back/front DR up to ultegra so i have matching group.
Would the 11 - 28 cog be the better choice? Also per you recommendation i would go with a medium cage back DR? would the short DR also work with this set-up?
Thanks again!
Originally Posted by swampy1970 .
Quote: Originally Posted by biserker1 .
Thanks for all this info!
My bike currently has 12 - 27 back cog with a medium rear DR. All Shimano 105 with a compact crank 50/34. My shifters are Shimano Ultegra. I thought about taking the cog, chain, back/front DR up to ultegra so i have matching group.
Would the 11 - 28 cog be the better choice? Also per you recommendation i would go with a medium cage back DR? would the short DR also work with this set-up?
Thanks again!
You must have been away during recent discussions ...Originally Posted by Adam-from-SLO .
the difference between a 28T - 27T = 1 tooth /img/vbsmilies/smilies/smile.gif
Thus, the 28T will have a slightly larger circumfrence then the 27T ring. In which case, the 28T will be slightly easier to push when riding uphill (given the same front chainrings being used).
So, the only way to use a 11-32 or 11-34 cassette on a road bike (if using Shimano 10-speed shifters), is to go with a mountain bike rear-derailleur (like Deore, XT, etc. , with long cage ) ? Can a Ultegra Medium cage do a ring larger then 28T ?
So the 28t cog will be 1/27th easier than the 27t. That's 3.7 percent.Originally Posted by Adam-from-SLO .
the difference between a 28T - 27T = 1 tooth /img/vbsmilies/smilies/smile.gif
Thus, the 28T will have a slightly larger circumfrence then the 27T ring. In which case, the 28T will be slightly easier to push when riding uphill (given the same front chainrings being used).
So, the only way to use a 11-32 or 11-34 cassette on a road bike (if using Shimano 10-speed shifters), is to go with a mountain bike rear-derailleur (like Deore, XT, etc. , with long cage ) ? Can a Ultegra Medium cage do a ring larger then 28T ?
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