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Centaur triple(8 posts)

Centaur tripleLeroy
Jun 29, 2003 10:26 PM
Considering converting to a 10 speed centaur triple from a 9 speed racing t. I am in the budget minded group that Campy was aiming for with centaur triple - I can hear the bullets whizzing past! Just trying to cut the budget to the least possible... Does anybody know whether centaur triple uses the regular 111mm bottom bracket or does it use the assymetrical 111 that record uses? Can I convert my racing t rear derailleur to 10 speed by changing out the pulley wheels? Should I just go with a medium cage centaur rear derailleur? Thanks in advance.
go to www.campagnolo.commadstork
Jun 30, 2003 5:07 AM
And the best answer is, it depends. Per campy's site, you can use the AC-H (Centaur/Veloce) 111mm bottom bracket on a triple setup for certain seat tube diameters, but have to go with 115.5mm for larger tubes. I don't see the 111 asymetrical bottom bracket listed under the Centaur specs, so I think the AC-H is the way to go. Those are usually $20-$25, vs. approx. $100 for the Record 111.

I think you may have an issue with the geometry of an older (pre-2000) rd when used with 10 speed shifters. The pulleys may fit, but the question will be the compatability of the shifters and rd. Look to www.branfordbike.com for more on this. I've contacted Branford Bike with questions on Campy compatability and found them to be helpful.

I'm thinking of going from Daytona/Centaur 10 speed double to a triple Centaur crank and front derailleur. If I read the specs correctly, I can use the medium cage (which I have) on the triple, but only if using a maximum 26 in back. If you want Campy's 13-29 cassette with the triple, looks like the long-cage rd is needed. I'm going by Campy's rd capacity specs.

Hope this helps.

madstork
my suggestion...C-40
Jun 30, 2003 5:45 AM
Don't be so cheap. Change the rear derailleur.

If you want to save money, you should try to use your existing crank, as is, unless the chainrings are in need of replacement. The only difference between a 9 and 10 crankset is the big chainring, which is .4mm closer to the middle ring. I would also try to use the front derailleur.

The medium cage derailleur will provide full capacity with up to a 26T rear cog. It will also work with the 29T cog, but would have the capacity reduced by 3 teeth (just don't shift to cogs smaller than 16T).

The assymetrical BB is used only with the Record level triple crank. The left crankarm of the Record triple is identical to the double crank. The left side of the assymetrical BB is the same as a Record/Chorus double, which requires a 102mm BB.
my suggestion...Leroy
Jun 30, 2003 6:56 AM
It looks like I can use my Racing T crankset by replacing the large chainring to a 10 speed. I can either get my ergo re-done at branford bike for about $100.00 or spring for a 10 speed ergo shifter set, or maybe just a new right shifter; get a medium cage centaur 10 speed rear d; use the front d. I have; cassette and chain, and I'm all set. Did I omit anything or mis-calculate? Thanks for heading me in a better direction.
If you have a backup bike to ride you can try the followingkilimanjaro
Jun 30, 2003 7:51 AM
1) convert your right shifter yourself. Go to campyonly.com which has instructions. I think the kit is around $60 from Brandfordbike.

2) If your rear derailleur is 2001 or later you can convert to 10 speed by adding 10 speed pulley wheels. Again see Branford bike's website.

3) If you want to buy a cheep 10spd cassette check out Miche at Glorycycles.com. I think that they are $45 or so but have limited range.

Including cost of new chain, new chainring you could keep total cost under $200.

Good luck
Where to buy...PeterRider
Jun 30, 2003 9:00 PM
I did some search a few weeks ago, here is what I got, to switch from chorus double:
- centaur 10s triple crankset and record 10s triple ft derailleur from sdeals.com
- chorus triple bottom bracket from lickbike.com.

Everything arrived promptly, the stuff from England even faster than the stuff from lickbike.

Pierre
I don't think chorus triple bb does not fit centaur triple crankkilimanjaro
Jul 1, 2003 10:41 AM
I am pretty sure that Chorus BB is asymetrical 111mm in length and is designed for the record triple crank only.

Centaur uses a symetrical 111mm BB.

In any event. Let us know how it turns out.
Thanks for all the good adviceLeroy
Jul 3, 2003 5:21 AM
I'm going to think about it. Rode the 9 speed triple yesterday and it really works smooth and quiet. I hate to take it apart when its working like that. Maybe I'll convert my 9 speed double chainring to 10 speed. That's less complicated and cheaper.