Mechanics and Fixing Any Questions Answered

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drn22

Hi all, can anyone help with old BB bearings? How do I know if they need replacing (figure since it’s stripped down I might as well - and it’s from an old crappy eBay purchase) and how do I know what size. Spindle/axle is marked 70 = W =115

Thanks for any help!

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gbj_tester in reply to @drn22

Spindle/axle is marked 70 = W =115

Those aren't the marks I'd worry about, your real problem is the pitting on the races.

70 would be an Italian BB, so check what you've actually got, and then sling a BB-UN300 in there assuming it's actually just an Italian axle in a BSC BB. If it really is Italian, VP make a beater grade 70×115 Italian cartridge BB, or you might get lucky and find a NOS BB-UN55 in that size.

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drn22 in reply to @gbj_tester

Many thanks for the help. I think it is italian (both shells are conventionally threaded the same way), so with a bit of luck you think this should fit...?

https://www.tradeinn.com/bikeinn/en/vp-monoblock-steel-ita-bottom-bracket/137578044/p?utm_source=google_products&utm_medium=merchant&id_producte=10777869&country=uk&gad_source=1&gclid=Cj0KCQjw1qO0BhDwARIsANfnkv_slO0XTuUcPwUqXQV6Y7woL4PhnBDOAee7jsMOgHCwqsd3Vfobk8oaAlFHEALw_wcB&gclsrc=aw.ds

It is just for a pub bike, and I'm a novice mechanic, so anything that works will do

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