I have a Vitus Nucleus VR 27,5 2020 model, and i want to replace my bottom bracket but im having a hard time figuring it out.
This is the page of the bike with all its specs: [https://vitusbikes.com/products/nucleus-27-vr-bike-altus-2×9](https://vitusbikes.com/products/nucleus-27-vr-bike-altus-2×9)
info about bottom bracket: Square Taper Cartridge Bottom Bracket,73mm / 113.5mm.
Now im on a website for mtb parts where im looking to buy all parts to replace ( also changing chain and casette) and there is 0 bottom brackets with 73mm/113,5mm spec, there is only one that is close, it has 73mm/113mm dimensions, so its 0,5mm off?
I think this one should fit, but im really not sure:
[https://www.mantel.com/shimano-bb-un300&spec\[\]=21160](https://www.mantel.com/shimano-bb-un300&spec[]=21160)
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Also, why is there so little selection for bottom brackets for my bike, does my bike have unusual dimensions for a mtb? For brackets with other dimensions the site has tons of options.
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Sorry is this question comes off as stupid, im really not technical when it comes to bicycles this will be the first time im trying to replace parts on my mtb ( this my first mtb)
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by Puzzleheaded_Bike_32