What bottom bracket to get?

[maxido]

Hi there, I've taken my bottom bracket out of my vintage bike because it felt loose pedalling (not an easy task but I managed to knock out the pins and pull it apart). Now I want to replace it, but I am aware that vintage bottom brackets can be tricky to replace. Based on the photos, could someone please advise as to what type I should be looking for?

Any help is much appreciated.

Thank you !

Max

 

[the_abhiG]

If you can also have option to change crankset, then I would suggest to go with Square taper BB which is more modern version of vintage BB, but if you don't want to change crankset then it'll be a little tricky, you have to buy same BB components.

 

[midlife]

Give everything a really good clean and see what it looks like, might be OK with new balls and grease?

 

[MichaelW2]

How is the bearing surface of the spindle? Unless it is badly pitted it should clean up OK. You can get new cottared bb spindles ( SJS cycles, Freemans of Norwich) . Keep your old cottar pins, new ones are made of cheese.

 

[MontyVeda]

As others have said... give it a good clean and replace the bearings. There's a strong chance it'll live another fifty years

 

[rogerzilla]

Cotter pins are supposed to be soft (or at least softer than the crank). As well as not wearing the crank, they bed in better.

Apparently one firm briefly marketed aluminium cottered cranks. It did not go well.

 

[cyberknight]

Give everything a really good clean and see what it looks like, might be OK with new balls and grease?

@Fnaar

 

[maxido]

Thanks for all your comments, based on this advice I have ordered grease, bearings and white spirit to give it a good clean. I'll see how that goes!

 

[maxido]

I've cleaned the axle thoroughly and I've noticed a slight chip on one end (pictured here), and both ends seem quite used. Would this need replacing or can still be used?

Thanks again!