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centaur -> DA 38(6 posts)

centaur -> DA 38rinco
Nov 1, 2002 11:06 AM
I have a complete Centaur group (50/39 – 13/29). Can I change the double Centaur crankset to a Shimano DA single 38 (remove front derailleur) and keep the 13/29 in the rear.
Sure, if you change the bottom bracket as well,TJeanloz
Nov 1, 2002 11:11 AM
However, there is a risk that the chain will fall off if you don't have a front derailleur.

Out of curiosity, why would you want to do this?
makes no sense...C-40
Nov 3, 2002 1:21 PM
What would such a change accomplish???
C'mon,TJeanloz
Nov 3, 2002 2:57 PM
With your superior engineering knowledge, which you are showing off all of the time, you must know that Campy chainrings BCD is 135, while Shimano's is 130, allowing use of a 38 tooth ring- which is too small to fit on a Campy crank. Which, coupled with a medium cage Campy rear derailluer, would offer the smallest gearing available on a double without resorting to MTB components. That's the only reason I could come up with.
what's the point???C-40
Nov 4, 2002 9:42 AM
The difference between a 38 and 39 tooth is 2.6%. Too small to be significant - so I repeat, what's the point?

Unless the poster has a spare DA crank and BB laying around, it's silly to spend that much money for such a small reduction in gear ratio.

There's darn little asked on this site that require anything beyond high school level math. It always amazes me that how many folks can't handle fractions and percentages. About the most complicated math I've done on this forum is some trigonometry, which is also a high school course.
Yeah, what a bunch ofscottfree
Nov 4, 2002 10:57 AM
dumbasses everyone is.