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39 tooth chainring for Ultegra triple?(8 posts)

39 tooth chainring for Ultegra triple?aet
Dec 5, 2001 7:23 AM
Anyone know where i can get one. I thought TA made one but apparently i was wrong. any other possiblities?
re: 39 tooth chainring for Ultegra triple?Chen2
Dec 5, 2001 7:57 AM
I've been looking for one for about 4 years now. The new Dura-Ace triple comes with a 39 middle ring. I don't think the D/A individual parts are available yet, but I suspect you could replace the Ultegra 42 with a Dura-Ace 39. Or you could replace the entire crank set with the D/A but then the D/A big ring is a 53, not 52 like the ultegra. I don't know of any after-market rings that are designed to work in the middle of a triple. I wish Shimano would give us more gearing options, in front and back.
You're SOLpmf1
Dec 5, 2001 8:34 AM
My wife has this and I have never gotten a standard 39 tooth ring (w/o ramps) to work. It won't shift up from the smallest ring. Shimano doesn't, to my knowledge, make a 39 tooth Ultegra "A" ring. I see the new DA triple has a wiser gearing choice of 53x39. Perhaps you can get a DA triple ring that will work on the Ultegra triple set up. Of course it will be modestly priced at $75 no doubt.

I always thought that was the dumbest thing about the Ultegra triple. you were either stuck grinding up moderate hills in the 42 (too big) or spinning like crazy in the granny 32(?) which is too small. Why they didn't make both a 39 and a 42 for that group is beyond me.
crap! (nm)aet
Dec 6, 2001 1:42 PM
Colorado Cyclist has....sprockets2
Dec 7, 2001 9:19 AM
Stronglight rings "for Shimano", but it doesn't say if it is for the triple or not, and I don't know if that matters. As I recall, there are sizes smaller than 42 for the middle ring.
re: 39 tooth chainring for Ultegra triple?KStone
Dec 7, 2001 7:21 PM
A 39 Ultegra from a double works for me...also swapped out the 30t granny for a 26. Shifting from the 26 to the 39 requires a little extra nudge but nothing to difficult.
does it really matter?Dog
Dec 9, 2001 5:50 PM
As you can see from the gear inch chart below, using a typical cogset of 12-25, the 39 and 42 are nearly identical, except the 39 goes ones gear step lower and the 42 one step higher.

Nonetheless, I'd prefer the 39, but the only reason I can think of is those few times I might need the 41 inch gear, I don't have to go to the granny.

Interestingly, the better thing might be to use only the 30 and the 52, omitting the middle ring entirely! If only you could get it to shift...
does it really matter?aet
Dec 10, 2001 1:01 PM
i feel it would save me s shift and i could stay away from the granny. i know it is not reasonable but i hate to have to do that extra shift.