Identifying old bott bracket

[horhif]

Hi

I've a new road bike but been using an old Mtb off road.

It's a decathlon vitamin r rock rider. It seems the bearings have gone in bottom bracket so I'm going to replace while wait for cycle to work scheme to open again next year.

I'm struggling to identify the parts. First couple pics show bottom bracket which is 72 x 127 in size.

Then what tool can I use to remove the locking cup in pic 3. On it it says 1.27 x 2.4

Any advice greatly appreciated

Thanks !

 

[Yellow Saddle]

That looks like the Campagnolo standard, even though the BB isn't Campy' ParkTool does make a BB cup tool for that BB but I wouldn't bother. Knock it off with a chisel and replace with standard splined type and cartridge BB such as Shimano UN 52.

 

[horhif]

That looks like the Campagnolo standard, even though the BB isn't Campy' ParkTool does make a BB cup tool for that BB but I wouldn't bother. Knock it off with a chisel and replace with standard splined type and cartridge BB such as Shimano UN 52.

Thanks so much for your advice, much appreciated!!

 

[overmind]

I've been using a pipe wrench (aka Stilsons) to remove BB lock rings. It can slightly damage the outside of the ring but it works on everything.
I put a cheater bar on the end for extra leverage. Maybe if I put some strips of wood between the teeth of the wrench and the lock ring it would minimise any damage.

from: https://www.screwfix.com/p/forge-steel-pipe-wrench-14/26843

 

[midlife]

Pictures a bit dark but is it stamped Thun ?

 

[overmind]

Pictures a bit dark but is it stamped Thun ?

I think it is Shun (bottom bracket). I had Shun cranks on a bike I bought from Amazon. I would guess some Chinese brand.