Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Bikes: 7⃥ 9 road bikes
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Originally Posted by Sportsman9
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.
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.
Last edited by hueyhoolihan; 05-24-11 at 08:56 PM.