Any Cyclists - Tech question ?

John Young

John Young

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I have replaced my rear freewheel / cassette on my bike (worn out) and my front crank (also worn) and I am thinking maybe I should also change my front front bottom bracket while the crank is off.

My dilemma is the front bottom bracket 'seems' fine - no noises or grating and grinding nothing - it seems in good condition and I think it was replaced in 2014 and it has been replaced a couple of times by me but using the same crank so should I just leave alone and put new crank on or should I replace while the crank is off to save problems later ??
 
The one time I needed to replace a bottom bracket it had done something like 40k miles.

I'd leave it if there are no obvious signs of wear.
 
neil_g said:
you dont have to replace the bb, what style bb is it? if it sounds and feels okay then id leave it.

i take it you're doing the chain with the new cassette and crank?
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Its the sealed cassette type bottom bracket and yes I am replacing the chain. I am sure it feels OK but I will double check


zendog said:
The one time I needed to replace a bottom bracket it had done something like 40k miles.

I'd leave it if there are no obvious signs of wear.
Click to expand...

Thanks for the advice :)
 
If it's the good old thread type (which it sounds like it is) rather than the new-fangled but pretty shoddy press-fit ones then I would leave it, they're basically bomb proof.
 
i recently removed mine cleaned and repacked it with lithium grease on my giant after 10 years.
 
15 quid for a new one as per your link i would fit a new one while you are down ther,
 
Fit a new one, gives you a good chance to clean out the BB shell, gravity ensures all the crud collects in there with nowhere to go.
(drilled a small hole in a steel frame I owned to let the water out)
 
Mr Bump said:
i recently removed mine cleaned and repacked it with lithium grease on my giant after 10 years.
Click to expand...

10 Years :jawdrop: that's impressive - what make is that ? Shimano ?

Mr Bump said:
15 quid for a new one as per your link i would fit a new one while you are down ther,
Click to expand...

Yeah that is what I was thinking - its not much money for some peace of mind for years ahead

tijuana taxi said:
Fit a new one, gives you a good chance to clean out the BB shell, gravity ensures all the crud collects in there with nowhere to go.
(drilled a small hole in a steel frame I owned to let the water out)
Click to expand...

Yes very true - looks like its a new one then

Thanks all for the feedback :banana:
 
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