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  1. #1
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    Adding Granny gear to Ultegra double crank

    I looks like the original post never posted. So, I will ask again. When upgrading to add a granny gear to to an Ultegra double crank does one only need to replace the crank and brifter, or are there certain chainrings that can be added to double cranks without replacing the crank itself?

    Or, does the derailurer need to be replaced as well?

    There are a lot of hills here, and on certain of them, I think it would be useful to have.

  2. #2
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    Quote Originally Posted by gholt View Post
    I looks like the original post never posted. So, I will ask again. When upgrading to add a granny gear to to an Ultegra double crank does one only need to replace the crank and brifter, or are there certain chainrings that can be added to double cranks without replacing the crank itself?

    Or, does the derailurer need to be replaced as well?

    There are a lot of hills here, and on certain of them, I think it would be useful to have.
    Hi,
    You'll need a new triple crank and new FD (for triple) and RD (for triple with a longuer cage). If you have ultegra 9 speed 6510/6501 shifter there's no need to replace the left shifter. But if you have the 10 speed groupo. you will need a new left shifter.

  3. #3
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    OK. Thanks, I guess it will end up being a little more spendy than I originally thought. I may hold off for a bit.

  4. #4
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    The lowest chainring you can fit is 38t. Your best bet is to change the rear gearing. If you have 9 speed, you can fit an mtb cassette. If you go over 30t ish, you will need a new mtb derailleur too. Deore is very cheap for the quality.
    If you have 10 speed, IRD make wide range cassettes, but they are quite steep.

    You will lose the tight cogs, but gain hill climbing gears. If you pick your ratios carefully, you should be fine.

  5. #5
    Elitist Troglodyte DMF's Avatar
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    What are you trying to accomplish? Easier climbing? You can change the cassette.
    Stupidity got us into this mess - why can't it get us out?

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  6. #6
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    Oh, i just thought it would be easier to have the triple up front for the really big hills. I can climb them now, but I would like to have a better go at them than I have right now.

  7. #7
    Elitist Troglodyte DMF's Avatar
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    You're right. A triple would be better for most riders (I prefer using one). But as you see it's not cheap to make that conversion.

    What's the gear range on your cassette?
    Stupidity got us into this mess - why can't it get us out?

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  8. #8
    Senior Member bfromcolo's Avatar
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    My road bike came with 52/42 chainrings and a 13-26 freewheel. The cheapest approach I found to get more acceptable gearing for the hills around here was going to a 38 chainring, and 13-32 freewheel, which required a new rear derailler. This cost me about $45 total to do. It dropped the gear inches from 42.6" in 42x26 to 31.3" in 38x32, a very noticeable difference. Since I have an old Suntour setup I had to go to friction shifting, but thats fine.
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  9. #9
    totally louche Bekologist's Avatar
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    FSA makes a middle ring to convert 130bcd doubles to triples. you still need a triple derailluer, and shifter may/may not need to be changed.
    "Evidence, anecdote and methodology all support planning for roadway bike traffic."

  10. #10
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    If you buy a new crank you will also need a new bottom bracket in addition to your new derailleurs and left brifter, which bikeaday probably forgot. It's not a cheap solution. You may be able to get away with buying a different cassette and swapping in a mountain (usually XT) long-cage derailleur to handle the greater range. There are a few threads around on this; do some research and see what you like.

  11. #11
    Elitist Troglodyte DMF's Avatar
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    Quote Originally Posted by tellyho View Post
    If you buy a new crank you will also need a new bottom bracket
    Maybe, depending on what is on there now. External bearings (10-speed Ultegra) go both ways.
    Stupidity got us into this mess - why can't it get us out?

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  12. #12
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    I saw one of the FSA that allows one to add the smaller chainring up front. So, If put this one on my bike for the middle ones and then add the smaller one, All the extras I may need to buy is a new brifiter up front, if I can't get the shifting to accomidate the new set-up?

    Also, has there been may people out there that have experience with these FSA double / triple chain rings?

    The main reason I want this is to climb hill I couldn't achieve otherwise. Here is the one I went on last week that I finally had to give up and walk up a portion of it.

    http://www.gmap-pedometer.com/?r=1196433

  13. #13
    Elitist Troglodyte DMF's Avatar
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    Geez, if you're gonna make the investment in new brifter, BB(?), dérailleur, why scrimp on the crank set? Just buy a factory triple and sell the old one on eBay. The difference will likely come to less than the FSA add-on and you won't have to worry about chain line and FD range, etc..
    Stupidity got us into this mess - why can't it get us out?

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