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Centaur/Daytona or Chorus(8 posts)

Centaur/Daytona or Chorusgrover
Dec 12, 2001 7:05 PM
I'm planning on buying a groupset for a TCR Zero Frame. I've heard the bad comments about the heavy Daytona/Centaur bottom bracket, but I've also heard that there was little difference in performance between either group. Any info? Thanks.
Chorus if you can afford itMcAndrus
Dec 13, 2001 6:31 AM
There are slight performance differences that you'll notice in competitive situations like the speed of a shift, for instance. For casual riding, I think the difference would be insignificant.

I ride Daytona with Chorus shifters and am very happy with the set up. If I had money burning a hole in my pocket, though, it'd be full Chorus or even Record.
Chorus, I mean Daytona, wait, I mean Chorusslow-ron
Dec 13, 2001 6:32 AM
I've got a bike outfitted with a mishmash of Chorus & Daytona and I don't think you'd be unhappy with either group. Daytona is a tad heavier and the surface finish of the parts is not a nice as Chorus but functionally I can't see how it would be that much different. Initially I bought into the negative rap on the Daytona B.B. but after comparing actual weights I can't see a huge difference. Daytona (AC-H, this is the hollow shaft B.B.) weighs 288g. Chorus weighs 277g. Here's the kicker, the Daytona crank weighs 5g or so less than Chorus. The best set up would be a Daytona crank with a Phil Wood ti B.B. but that may set you back some extra cash. I wish Campy had made the B.B. spindle lengths the same between Daytona & Chorus/Record but they didn't. Probably some marketing scam.

I guess the final decision between the groups rests on your wallet. For the money I think Daytona is a great deal.
A few points,TJeanloz
Dec 14, 2001 7:46 AM
The AC-H bottom bracket is substantially heavier than it's Chorus counterpart- 288g vs. 220g (per Campagnolo). 68 grams is nothing to sneeze at. Furthermore, the bearing quality is higher, and the installation design is better on the Chorus and Record.

The difference in lengths is because of the different crankarm designs. A Centaur crank will not clear the chainstays if you used a 102mm bottom bracket. But you will be pleased to know that Campagnolo now offers the Record bottom bracket in 111mm, which is the correct length for the Centaur double crank.

Further differences between the two groups are the the Chorus Ergopower levers use bearings in their mechanism, where the Centaur uses bushings.
thanks for the correctionslow-ron
Dec 14, 2001 8:13 AM
I got the weight number for the B.B. out of a nashbar catalog. last time I value their info.

didn't know that Campy started making a record b.b. in 111. I assume that this is for the record triple crank out this year.
thanks for the correctionTJeanloz
Dec 14, 2001 8:17 AM
Yes, the new 111mm bottom bracket is for the Record triple- which I think was long overdue. The Racing T was cool- and cooler than Ultegra (formerly Shimano's best triple), but when a guy wants full Record, he wants full Record.
doesn't work with daytona/centaurslow-ron
Dec 14, 2001 10:13 AM
went to look for the 111mm record b.b. at branford's web site. they've got the b.b. but it turns out that the spindle is not symetrical and therefore doesn't work with daytona/veloce/racing-t. here i was all excited but campy had to poop on my parade. doesn't really matter, however, because a record b.b. costs about the same as a cheap phil wood.
Thanks for the infogrover
Dec 14, 2001 8:20 AM
I had also heard about the bushing/bearing difference. I had read little tidbits around the web in which the bushings in the Centaur/Daytona shifters tend to feel stiffer at first, but still retain similar performance (albeit with less gloss) compared to Chorus after break-in.

I decided to try it myself by test riding a Litespeed Classic at a local shop with Daytona, and one similary spec'd with Record. I'd have to say that there is a definite difference between both drivetrains, but I was still impressed by how Daytona shifted on par with Record, considering Record to be almost twice the cost of Centaur/Daytona.

I suppose it will probably be a gametime decision. Thanks for the info peoples.