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Old 02-19-08, 01:18 PM   #1
billallbritten
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Bianchi Veloce square taper BB/Crank spec questions

If I replace the veloce gruppo BB on my Veloce, I understand it has a 111mm spindle and 68mm English thread shell (compact double crank, 2006).

Can I use a Chorus or Record 102mm square taper BB or must I use a Chorus or Record 111mm triple spindle? Also, some of the BB descriptions refer to the Chorus and Record BB's as having an asymetrical square taper and not compatible with Centaur and below cranks.

So, if I wish to upgrade, say, to Chorus, do I have to upgrade the crank, too? Might as well go UT in that case if an ultra torque will fit the Bianchi BB shell.

No problem sticking to the Veloce BB (mine has > 10k on it, no sign of looseness or noise) so there is no rush.

Just curious as to ultimately what compatibility issues with the Bianchi frame I might encounter.

Thanks in advance,

Bill
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Old 02-19-08, 02:24 PM   #2
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Yes, the Campy AC-H bottom bracket has a 111mm spindle. It is available in English and Italian threading. You most likely can't use the Record or Chorus BB, because (as you said) the 102 spindle is too short, and the Triple version is assymetrical. You can upgrade to the Centaur BB (as long as you don't mind black cups). The only reason for doing so would be the much nicer interface for wrenching on. My biggest complaint about the AC-H is the knuckle-busting tendancy for the proprietary spanner to slip off of the edges of the cups. The Centaur unit uses the same splined lockring tool as Campy cassettes and the higher level BBs. BTW, I got 15K miles on the original Mirage BB on my dear departed Bianchi, so you probably won't have to think about this for a while.
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Old 02-19-08, 02:45 PM   #3
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I was guessing the same thing, that there is a break at the Centaur <> Chorus level in terms of spindle compatiblity. The new Park tool for the Veloce lockrings appears (I have one on order; thought, wrongly, that the campy cassette tool would remove the Veloce chainrings, works with Centaur +, though) to have tabs that allow one to "push" towards the center of the BB when wrenching the lockring to prevent the knuckle busting you mention. I'm familiar with the knuckle busting concept from the old days of removing adjustable cup lockrings with those single toothed spanners on my old stronglight bb.

From the Park website, note the stabilizing tabs. http://www.parktool.com/products/det...=25&item=BBT-4

Even if I went with Centaur, I'd still need the Park tool (nearest Campy equipped LBS is only 120 miles away, closer one is Shimano only :-) ) for one use, removing the Veloce BB.

A third option is, of course, the 110.5x68mm Phil Wood which should work, I'd think, only .25mm per side difference, if that much - I think the Phil Woods can be laterally shifted slightly to improve the chainline. 'course that requires a new tool (what doesn't) and bearing cups, about $140 all told for the SS as best I can tell v. ~$40.00 for the Veloce.

Thanks for confirming what seemed to be the case.

I appreciate your time and that of others; I've pretty much decided to go back to doing my own wrenching and have some questions that don't have obvious answers to me at Park or other how to websites. When the spanner and a couple of other tools I don't currently have come in tomorrow, I'll be able to do about everything that doesn't require a wheel jig or aheadset tools.

I seem to be getting similar excellent mileage (>10k now) on the Veloce BB. However, a sudden failure on my Trek of a low end Truvativ ISIS (I'm familiar with the design problems of the ISIS system of bearings) got me thinking about laying in a Campy spare.

Sincerely,

Bill

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Originally Posted by demoncyclist View Post
Yes, the Campy AC-H bottom bracket has a 111mm spindle. It is available in English and Italian threading. You most likely can't use the Record or Chorus BB, because (as you said) the 102 spindle is too short, and the Triple version is assymetrical. You can upgrade to the Centaur BB (as long as you don't mind black cups). The only reason for doing so would be the much nicer interface for wrenching on. My biggest complaint about the AC-H is the knuckle-busting tendancy for the proprietary spanner to slip off of the edges of the cups. The Centaur unit uses the same splined lockring tool as Campy cassettes and the higher level BBs. BTW, I got 15K miles on the original Mirage BB on my dear departed Bianchi, so you probably won't have to think about this for a while.
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Old 02-19-08, 02:59 PM   #4
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FWIW, the AC-H BB is no longer made and is getting hard to find. The AC-H was hollow spindled and the AC-S was solid spindled. The Centuar BB replaced the AC-H and the AC-S (Veloce) remain the same.
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Old 02-19-08, 03:19 PM   #5
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So, I think it will be Centaur for the replacement/spare for use whenever. Couldn't find an AC-H this side of the pond. Black cups are okay, have black seatpost/stem/bars already.
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Old 02-19-08, 05:37 PM   #6
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I think Branford Bike still has the AC-H in stock.
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Old 02-20-08, 04:11 PM   #7
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I have the same Park BB tool for my Veloce BB and can attest to the fact that while those tabs can keep the tool from slipping onto the BB shell, they won't stop it from slipping off the other way (away from the shell). To solve this, I took a short 1/2" long section of copper water pipe and soldered it to to the center of a large washer so that it looks like a short top hat. This allows me to secure the BB wrench to the BB using a crank bolt.

First, I place the BB wrench on the BB collar. Next, I slip on the pipe/washer piece so that the washer presses down on the tabs. Finally, I thread on a crank bolt throught the pipe/washer and snug it up to hold it all together.
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Old 02-24-08, 08:59 PM   #8
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that's a good idea, hadn't thought of slipping outward.

Bill

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Originally Posted by Toyman991 View Post
I have the same Park BB tool for my Veloce BB and can attest to the fact that while those tabs can keep the tool from slipping onto the BB shell, they won't stop it from slipping off the other way (away from the shell). To solve this, I took a short 1/2" long section of copper water pipe and soldered it to to the center of a large washer so that it looks like a short top hat. This allows me to secure the BB wrench to the BB using a crank bolt.

First, I place the BB wrench on the BB collar. Next, I slip on the pipe/washer piece so that the washer presses down on the tabs. Finally, I thread on a crank bolt throught the pipe/washer and snug it up to hold it all together.
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