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42T ring mounted on the outside of the spider on a DA crank?(6 posts)

42T ring mounted on the outside of the spider on a DA crank?SS_MB-7
Apr 15, 2002 3:53 PM
I'm building a fixed-gear/singlespeed cross bike and I need a 53mm front chainline to match the 53mm chainline on my rear flip-flop fixed-free wheel. From what I can tell, the 118.5mm Dura-Ace BB (used for triples) with a Dura-Ace crank with the ring mounted on the outside of the spider should give me the chainline I need. Without dismantling my Record crankset and re-arranging the rings, It looks like it will work. But, every crank is different so I'm curious to know if the 42T inner ring can be successfully mounted as the outer ring on a Dura-Ace crank. The reason I ask is because the 36T ring on my singlespeed MTB cannot be mounted on the outside of the spider as it interfers with the backside of the crankarm.

Ride Hard,
Mike B.
Well, I'm not positive about the outer and a 42...Ahimsa
Apr 15, 2002 4:28 PM
...but couldn't you get the same thing with longer bolts and a spacer out of the center?

Not sure I've seen it done that way (on the outside with a 42). I've seen outside mounting of one ring, but only with larger rings than that.

Sorry to be of little help. Do let me know what the outcome is.


Apr 15, 2002 5:11 PM
Ignore my above post here.

I was thinking...ah, never mind what I was thinking. Truth is I wasn't thinking.

I have bash rings on the MTB beater and a spacer-ed cassette hub. I thought you meant...never mind.

This is what I get for throwing out poorly thought out replies to posts I apparently didn't read well enough.

Sorry mate.

A. (Certified tool)
Sure, you will need single chainring bolts however.MB1
Apr 15, 2002 4:47 PM
My Gunnar was set up that way, no problems however after a while I didn't really like the look so I got the double BB and mounted the 42 on the inside. It worked fine both ways.
But, if you switched to a shorter BB and moved the ring....SS_MB-7
Apr 15, 2002 4:57 PM
But, if you switched to a shorter BB and moved the ring from the outside to the inside, your chainline would be way off. What is/was your front/rear chainline?

Also, what didn't you like about the "look"?

Ride Hard,
Mike B.
Yes that is right.MB1
Apr 16, 2002 3:32 AM
I wrote it wrong, I installed the longer BB and moved the ring in. What I didn't like was the chainring mounting shelf on the inside of the crank always looking like it was going to catch or grab something between the frame and the crank (and cause my untimely death). Silly I know but I had the parts around so why not fool around with the bike a bit.