Just want to make sure i purchase the right size. On my current BB it says.

CHINHAUR
CH52 - 73
113.5L
BC1.37x 24T

I havent found a 113.5 size so would i just need to get a 113mm, 73mm Bottom Bracket?

Oh and are all bb serviceable/lubed? after taking my bb off I have no idea how to get to the bearings to see if they are worn or not. Thanks again.

You're on the right track. If it was my bike I'd buy specifically a Shimano UN52 73 X 113 bottom bracket. If I was feeling rich I might step up to a UN72. Since somebody put it together I'm sure there's a way to take it back apart but cartridge bottom brackets are generally considered not to be user serviceable.

Hi guys !

Greetings from UK !

On my 2013 Careera MTB I got an CH 52; 68x113L EN , BC 1,37x24T bottom bracket which has got some water inside of it and the sound of it spinning is not great, looks like is no more grease inside. Can the bearings be removed for inspection / grease apply or replacement ? Also , in the worst case scenario, what other model of bottom bracket can I use instead of the old one ?

Thank you in advance

P.S I m new on the forum so could not find much info on this

Most cartridge unit BBs are not meant to be taken apart or the bearings not meant to be accessible for servicing. Their replacement cost is so little that this is the path the industry has adopted when things get worn out. Before I would remove the unit I would get a sense of the range of chainring/crank position options. Can the rings fit closer to the frame and still have the der adjust in or opposite? Will the crank arm ends clear the stays? How's the current chain line front to rear? Then with an idea as to where the crank/rings can end up and still all be good I would look at the replacement choices and decide on the new BB accordingly. Pretty much all (but PHIL and Campy) Bbs will be JIS in their tapers, meaning to fit Shimano and their clones cranks. English threading is also pretty much the standard (but still needs confirming) and the shell width is a simple measurement any one should be able to do. Andy.

10 years
4 months
17 days

Is this a-
NEW ZOMBIE RECORD?

Andrew, thank you for the comprehensive reply. Its a shame the manufacture does not allow the replacement of the bearings( only ) as mine for example looks and work stunning just needs a bit of grease in the bearing.
Would a Shimano UN55 do as replacement as looks prety much the same in specs ?

Cheers

Yes; a UN55 68 x 113 will work fine.

Decoding yours:
CH 52; model
68; BB shell width
113L; BB axle length
EN BC 1,37x24T; English thread, British standard, 1.37 inch diameter, 24 threads per inch.

On you old BB, you could try pulling the seals of the individual bearings, flushing and re-greasing. You are likely to damage the seals, which are not available as replacements.

Plus, a Shimano UN55 is going to be a huge step up from what you have now...you'll most likely never need to replace it again.