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New campy BB or new Crankset

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New campy BB or new Crankset

Old 04-13-14, 05:58 PM
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tuxedotomson
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New campy BB or new Crankset

So I bought a used bike a couple of months ago, and it has a set of Campy Chorus cranks. The bottom bracket is now wearing out and there is some play in the bearings. I bike daily on it at least 8 miles a day. I ride fixed-gear with a front brake, but I do find myself doing skid stops from time to time and am also 180 pounds. Replacing the campy BB is pretty expensive, the BB goes for around $110 dollars. Is it worth replacing the BB, or would my weight and abuse on the bike just lead to another BB replacement in the near future? If anyone thinks I shouldn't replace the BB and switch to a more versatile crankset, please recommend some in the $100-150 range.
Side note... Two of the chainring bolts do not tighten, and just keep spinning. Any help on fixing that?
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Old 04-13-14, 06:06 PM
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You didn't say what type or Chorus cranks you have. If, for example you have 10 year old square taper cranks, you have the freedom to chose from any number of bottom brackets, and aren't locked in to Campag. OTOH more modern Ultra-torque limits your options, but I believe (don't know) that there are analog BBs that will work.

In any case, I'd focus on replacing the BB rather than starting fresh with new cranks.

As for the chinring bolts, take them out (you need to hold the nut side) and work the threads off the bike then oil and reassemble. O buy new bolts, since they're cheap enough (no need for them to be Campy.
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Old 04-13-14, 06:15 PM
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Awesome, so these are the same cranks. Vintage Double Campagnolo Chorus Alloy Bicycle Crankset 53 39 CSA009 | eBay So they are square tapered, can you recommend a BB? My frame is a Surly Steamroller.
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Old 04-13-14, 06:20 PM
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Campy Chorus and Record from the square taper era used specific bottom brackets, not the more common ACH or ACS used for Centaur and below. However, since the OP is using a single chainring on a fixie, the "correct" chainline required for a double or triple isn't as important so any similar length ISO taper can be tried. Maybe even a JIS taper will work
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Old 04-13-14, 06:32 PM
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Phil's BBs are made in California , and can be rebuilt , fit new bearings, etc. indefinitely .
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Old 04-13-14, 07:40 PM
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any problem with compatibility has more to do with the frame's BB shell width and threading , not so much the square taper crank. get ready to fuss with your chainline though. if you like the chainline as it is, make sure the overall length of the BB you purchase is within a millimeter of two of the one you are replacing, assuming it is symmetrical, which it may not be. even if you do, you may still have to fuss with it.
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Old 04-13-14, 07:43 PM
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Originally Posted by tuxedotomson View Post
So I bought a used bike a couple of months ago, and it has a set of Campy Chorus cranks. The bottom bracket is now wearing out and there is some play in the bearings. I bike daily on it at least 8 miles a day. I ride fixed-gear with a front brake, but I do find myself doing skid stops from time to time and am also 180 pounds. Replacing the campy BB is pretty expensive, the BB goes for around $110 dollars. Is it worth replacing the BB, or would my weight and abuse on the bike just lead to another BB replacement in the near future? If anyone thinks I shouldn't replace the BB and switch to a more versatile crankset, please recommend some in the $100-150 range.
Side note... Two of the chainring bolts do not tighten, and just keep spinning. Any help on fixing that?
Here's a compatible bottom bracket for $36.50 with free shipping

Origin8 Alloy Campagnolo Square Bottom Bracket - 68 x 102 at amazon

and if you really want the Campagnolo part you can order it from the UK for much less than $110. Ribble has 102mm bottom brackets for $74 provided that you don't live in Europe where they must collect VAT

Genuine Campagnolo 102mm bottom bracket at Ribble
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Old 04-13-14, 08:54 PM
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Originally Posted by Drew Eckhardt View Post
Here's a compatible bottom bracket for $36.50 with free shipping

Origin8 Alloy Campagnolo Square Bottom Bracket - 68 x 102 at amazon

and if you really want the Campagnolo part you can order it from the UK for much less than $110. Ribble has 102mm bottom brackets for $74 provided that you don't live in Europe where they must collect VAT

Genuine Campagnolo 102mm bottom bracket at Ribble
Is 102 what i'm looking for? I don't have a crank remover so I can't check out my current. I'm just using a single chainring.
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Old 04-13-14, 09:33 PM
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to do it right, you'll need to get that crank off there, and you might as well remove the BB and get an exact measurement. if you like the chainline you have, you'll have to get the BB length within a millimeter or two. or just take it to the LBS and ask them to remove the BB for you.
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Old 04-13-14, 09:57 PM
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Originally Posted by tuxedotomson View Post
Is 102 what i'm looking for? I don't have a crank remover so I can't check out my current. I'm just using a single chainring.
Second generation 8 speed Chorus/Record cranks like the one linked plus 9/10 speed square taper Chorus/Record use that bottom bracket. The older C-Record design uses a longer one. Perusing old catalogs and spares manuals for confirmation of what you have would be a fine idea.
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