I started fiddling to stop a creak and now the kn ckered BB is out
and the bike still hanging there.

What do I need to  measure to identify the bb as 68mm or 73mm? The old
one does not say on it.

I must say all those I have fitted previously I just bought without
checking this , so far as I remember.
I am looking forward to replacing it for about 10 to 15gbp. The
original is a cheap generic, probably cost a fiver new, and has done
loads of rough miles.

When unscrewing the bottom bracket how do people remember which way to
turn it?  I am always surprised.One day I will strip the thread.

TerryJ

"TerryJ"  wrote in message 
news:289bde8b-ed90-4b36-afa7-b7322cb8fe94@l64g2000hse.googlegroups.com...
>I started fiddling to stop a creak and now the kn ckered BB is out
> and the bike still hanging there.
>
> What do I need to  measure to identify the bb as 68mm or 73mm? The old
> one does not say on it.

Measure the frame - the width of the BB shell is the relevant bit. Bet it's 
68mm though...

> I must say all those I have fitted previously I just bought without
> checking this , so far as I remember.
> I am looking forward to replacing it for about 10 to 15gbp. The
> original is a cheap generic, probably cost a fiver new, and has done
> loads of rough miles.
>
> When unscrewing the bottom bracket how do people remember which way to
> turn it?  I am always surprised.One day I will strip the thread.

It's the other way to pedals. Or look it up on Sheldon. Or look at the 
thread on the replacement.

cheers,
clive

On 2008-09-22, Clive George  wrote:
> "TerryJ"  wrote in message 
> news:289bde8b-ed90-4b36-afa7-b7322cb8fe94@l64g2000hse.googlegroups.com...
>>I started fiddling to stop a creak and now the kn ckered BB is out
>> and the bike still hanging there.
>>
>> What do I need to  measure to identify the bb as 68mm or 73mm? The old
>> one does not say on it.
>
> Measure the frame - the width of the BB shell is the relevant bit. Bet it's 
> 68mm though...
>
>> I must say all those I have fitted previously I just bought without
>> checking this , so far as I remember.
>> I am looking forward to replacing it for about 10 to 15gbp. The
>> original is a cheap generic, probably cost a fiver new, and has done
>> loads of rough miles.
>>
>> When unscrewing the bottom bracket how do people remember which way to
>> turn it?  I am always surprised.One day I will strip the thread.
>
> It's the other way to pedals. Or look it up on Sheldon. Or look at the 
> thread on the replacement.

It can be hard looking at the replacement to know which side is which.

>
> Measure the frame - the width of the BB shell is the relevant bit. Bet it's
> 68mm though...

Yes it is 68mm

I decided to splash out and get a stronglight (still only 12gbp)to fit
the cranks, so I will not have to keep pressing the shifter when in
biggest ring.
TerryJ