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Old 08-09-14, 11:37 AM   #1
gaggarwal1981
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Giant Rapid 2 2011 Bottom Bracket

Hello all, I hope you can help.

I have owned my much loved Giant Rapid 2 2011 (Rapid 2 (2011) | Giant bikes UK & Ireland official website | UK / Ireland) for the past several years. Unfortunately, over time, the bottom bracket has developed a little play. I have an excellent cycle shop near me who are happy to replace the part for £35 however I would first like to have an attempt myself so that I can learn more about bike maintenance.
I know I have a Shimano R453 crankset and “BC 1.37x24” is printed along the bottom bracket.

Having scoured the web I have worked out that I will need Shimano Tiagra 4600 Bottom Bracket 68mm in an English thread (Shimano Tiagra 4600 Bottom Bracket | Chain Reaction Cycles).
Would anybody with more experience be able to confirm if this the correct replacement and/or recommend a suitable replacement/upgrade.

Many thanks!!

G.
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Old 08-09-14, 01:30 PM   #2
alcjphil
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That bottom bracket will not work with your crank. On the link you give for your bike it is clearly stated that your bike has an octalink bottom bracket
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Old 08-09-14, 01:48 PM   #3
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Being more specific, you need an Octalink V2 BB Shimano ES51 Octalink Bottom Bracket | Chain Reaction Cycles you will need to measure up for what you need. (should be 68 x to match what is currently fitted)

For the quote the LBS gave you, if you don't have the tools, it's a pretty good deal.
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Old 08-09-14, 02:09 PM   #4
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Originally Posted by jimc101 View Post
Being more specific, you need an Octalink V2 BB Shimano ES51 Octalink Bottom Bracket | Chain Reaction Cycles you will need to measure up for what you need. (should be 68 x to match what is currently fitted)

For the quote the LBS gave you, if you don't have the tools, it's a pretty good deal.
In order to remove the crank, you will need a crank puller, and you will need a splined tool to remove the bottom bracket, so your cost would exceed the quote the bike shop gave you
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Old 08-19-14, 01:32 PM   #5
gaggarwal1981
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Thank you all for your responses. I thought I would give a quick update to help others who may find themselves in the same situation as me.

A friend lent me his ICE bike repair kit which had all the tools I needed. I also noticed on the link it stated my BB was an octalink however this did not look right. Anyhow I fitted the Tiagra 4600 BB and it worked perfectly!!. The only thing I did was kept the plastic o ring and refitted on the left side.

Once again,

Thanks.

Last edited by gaggarwal1981; 08-19-14 at 01:56 PM.
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