MTB bolt size and how much tool i should have?

adamjose

How much in mm common bolt size on hardtail bike especially xc bike? and how much tool i should have maintenance at home?

reaperactual

Should cover almost every bolt on most mtb components with a set of Allen keys going from 1 to 10mm. You might end up using all those sizes at some point but some sizes you'll use way more than the others.

Other tools or tools for bike specific stuff I'd suggest looking into buying as and when you might need and build up your collection gradually.