Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Senior Member
    Join Date
    Apr 2007
    Posts
    158
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Mountain crank versus road crank

    Does a mountain crank come along with the wider Q factor, or can it be fit to my road bike and keep the narrower factor?

    I want to drop the teeth count on granny to about 24 or so, to turn my Tricross into a light tourer.

    Also: if a crank is "9 speed compatible" does that mean it will only work with 9-speed cassette or could it work with 8?

    Thanks.

  2. #2
    RT
    RT is offline
    The Weird Beard RT's Avatar
    Join Date
    May 2005
    Location
    COS
    Posts
    8,528
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I can't speak to the Q, but a 9 speed compatible crank has more to do with the chain than the cassette, if it has anything to do with it. My best results are in using a chain that matches the cassette/crank. Other combos will work, but not at all as smoothly.

  3. #3
    AEO
    AEO is offline
    Senior Member AEO's Avatar
    Join Date
    Jun 2007
    Location
    A Coffin Called Earth. or Toronto, ON
    My Bikes
    Bianchi, Miyata, Dahon, Rossin
    Posts
    12,245
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    a road triple with 74BCD inner ring should go down to 24T.
    MTB cranksets are usually wide to allow for chainstay clearange, but if you get a square taper crank, they Q-factor is more adjustable.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  4. #4
    Senior Member
    Join Date
    Dec 2010
    Location
    Above ground, Walnut Creek, Ca
    My Bikes
    7 single speed road
    Posts
    3,922
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Sportsman9 View Post
    Does a mountain crank come along with the wider Q factor, or can it be fit to my road bike and keep the narrower factor?

    I want to drop the teeth count on granny to about 24 or so, to turn my Tricross into a light tourer.

    Thanks.
    it came as a surprise to me the other day that mtb (triple deore ca. 1996) and road (double sakae ca 1986) cranks are not interchangeable. even though they both attach to the same type of square tapered BB.

    i had an old sakae road crank (very nice) off of a 86 trek elance that i was not using, so i thought i would swap it with the deore (not as nice). i did not attempt to swap BB's.

    i removed the chain rings. then attached to sakae to the BB. to my surprise the spider (sans chainring(s)) would not clear the driveside chainstay! endgame!

    just for grins, i tried the nondrive side. arm wouldn't clear nondrive side chainstay. apparently, there is more "cup" on the deore spider.

    as far as you are concerned going from mtb crank to road, it may fit but check your drive line, it may favor the smaller cogs too much.

    huey
    Last edited by hueyhoolihan; 05-24-11 at 08:56 PM. Reason: unclear

  5. #5
    Low car diet JiveTurkey's Avatar
    Join Date
    Aug 2007
    Location
    Corvallis, OR, USA
    My Bikes
    2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
    Posts
    2,379
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by hueyhoolihan View Post
    it came as a surprise to me the other day that mtb (triple deore ca. 1996) and road (double sakae ca 1986) cranks are not interchangeable. even though they both attach to the same type of square tapered BB.

    i had an old sakae road crank (very nice) off of a 86 trek elance that i was not using, so i thought i would swap it with the deore (not as nice). i did not attempt to swap BB's.

    i removed the chain rings. then attached to sakae to the BB. to my surprise the spider (sans chainring(s)) would not clear the driveside chainstay! endgame!

    just for grins, i tried the nondrive side. arm wouldn't clear nondrive side chainstay. apparently, there is more "cup" on the deore spider.

    as far as you are concerned going from mtb crank to road, it may fit but check your drive line, it may favor the smaller cogs too much.

    huey
    Each crank model requires a specific bottom bracket spindle length to realize the proper chainline; this is independent of whether it is road or MTB.

    Edit: See: http://www.sheldonbrown.com/bbsize.html (Unfortunately, Sakae cranks are not listed.)
    Last edited by JiveTurkey; 05-25-11 at 12:15 AM.
    Quote Originally Posted by slopvehicle View Post
    Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •