Q-factor Chorus vs Centaur

[Stian]

Hey !

I'm building up an bike and wonder if anybody knows the difference in Q-factor between Centaur and Chorus. I am planning to run the carbon compact version.

Need more reasons than weight to choose Chorus over Centaur.

Thanks

Stian

[nexusheli]

The crank arms themselves are nearly identical. You're paying for the name and the chainring upgrade on the Chorus.

Here's the kicker: the Centaur requires a longer BB spindle. The Chorus uses an asymmetrical 102.5 spindle (like Record) where the Centaur needs the longer 111 symmetrical spindle. That said, your q-factor difference is probably close to 10mm wider for the Chorus.

Hope that helps.

[divve]

Not sure whether you'll notice it, but the Chorus version is quite a bit stiffer and it's 102mm symmetrical for the double.

[Boonen]

I'm not sure on the cf models, but the aluminium cranks of Chorus and Centaur have a slightly different fit. You'd have to use the Chorus with a Chorus or Record bottum bracket and the Centaur can only be used with Centaur, Veloce etc. bb.
I don't think there is much weight difference in the two (wasn't last years Daytona a bit lighter then Chorus ) but you will notice a difference in weight and quality in the bottum brackets! In my experience the Chorus bb is just so much better and longer lasting then the Centaur, so for that alone I could get the Chorus.

[Stian]

Hey !

Thanks for sorting that out. Seems too be headed towards Centaur then. It's only about 150 grams difference between the two, but a whole lot of bucks. I am more concern about Q-factor and chain-line.

Stian

[jpr]

Chainline is the same for Centaur/Chorus - so the same front derailleurs will work. The new Centaur Bottom Bracket is very similar to the Chorus but with a 111mm symmetrical axle. It weighs over 50g less than the old (AC-H) BB.

They claim the new BB is well matched to the Carbon Compact Chainset.