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Old 09-28-12, 07:48 AM   #1
pandaking
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Tighten / Repair the Bottom Bracket on my Specialized Allez 24 2011 (triple?)

Hi,

Sorry if this is obvious but after searching around I wanted to double check.

I have a Specialized Allez 24 2011 - specs are here: http://www.evanscycles.com/products/...25026#features

After cycling the length of Ireland through rain, more rain, and then the bike surviving two Easyjet flights, it has started to make a little noise when I pedal.
On inspection it appeared to be from the cranks which I tightened, before realising the whole bottom bracket has some wobble to it.

I have managed to remove both the crank arms now after buying the much needed tools, but am now a little unsure how to proceed.
Here is how the bottom bracket looks:


I think it could also do with a bit of a clean too as they look dirty and doesn't feel/sound smooth. I have purchased some bearing grease.

From what I have read, it would appear I have a Shimano bottom bracket? And to tighten it I will need to purchase something like these?:
http://www.evanscycles.com/products/...18385#features
http://www.evanscycles.com/products/...05486#features

I just wanted to confirm that I had got this right before buying something I might not need.

Many thanks
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Old 09-28-12, 08:30 AM   #2
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Either tool should work; the Park tool BBT2, now replaced by the BBT22, has a wider variety of driving options (3/8" square drive, 1" or 32mm wrenches) than the Icetoolz (1/2" square drive only) Don't forget to use grease or antisieze on the BB threads and that the drive side is left-hand threaded.
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Old 09-28-12, 08:35 AM   #3
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Odds are, that is a cartridge bb. Those are generally not serviced, but replaced as a whole. The tools you suggest would both work to remove it - but you only need one. The two easy parts are determining BB shell width (68 or 73 mm) and the axle lengths. There are some options on which threading it might be, but sone net searching might tell you what to use. Then pick up a new square taper bb of the required spec and desired price level and go at it.
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Old 09-28-12, 08:49 AM   #4
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Man you guys are the best, thanks for such useful responses!

I have a 3/8" torque wrench, so I have purchased the park tool BBT2 - thank you so much dsbrantjr for the detailed response.

dabac - From the specs on the bike, I believe I have the widths/lengths you mentioned (68mm x 118mm). I will see how I get on with this tool and cleaning/tightening the existing bottom bracket, and if I get no joy I might post back here to double check the new one I order should it come to that.

Thanks again both of you!
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Old 09-28-12, 08:56 AM   #5
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According to the information link in the OP it has a 68mm x 118mm BB. Given its 2011 vintage it is extremely likely that it is English threaded (1.37 in x 24 TPI) and can be replaced by the run-of-the-mill Shimano BBs.
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Old 09-28-12, 09:23 AM   #6
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as dabac mentioned, cartridge BBs are not serviceable but are replaced. The BBT2(22) tool fits well but I find it difficult to keep it from popping out of the BB while applying sufficient torque. I find that using a bar clamp across the tool/wrench and BB makes easy to apply the correct torque (with a torque wrench) without wrestling with the tool.
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Old 09-29-12, 02:48 PM   #7
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Quote:
Originally Posted by dsbrantjr View Post
as dabac mentioned, cartridge BBs are not serviceable but are replaced. The BBT2(22) tool fits well but I find it difficult to keep it from popping out of the BB while applying sufficient torque. I find that using a bar clamp across the tool/wrench and BB makes easy to apply the correct torque (with a torque wrench) without wrestling with the tool.
Pedro's has a neat little tool to help the BB tool:
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Old 09-30-12, 10:48 AM   #8
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When you do your disassembly make sure that the BB cartridge itself is the loose culprit. It could be just the cartridge is loose in the BB. I've also found out that there are different levels of quality in replacement cartridges, but havent gotten any real good answers to which are cheap and which are really good in an earlier thread I posted. Since you really RIDE your bike a high quality one would be a good choice.

Work Smart!

-SP
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Old 09-30-12, 11:30 AM   #9
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Originally Posted by speedy25 View Post
It could be just the cartridge is loose in the BB.
No 'just' about that... if left long enough, it could toast the frame, making a special threadless BB necessary.
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