How do these hold up for MTB? Seems the best value weight shaving possible?

If I’m building I bike I’m doing the best job I can, gonna splash £60 on one!

myprotein do a decent one

Rubber Queen 2.4?

I think I’m going to try Goodridge

Had the £340 deal been around before I bought anything I would have jumped on it.

I bought most of the X9 stuff used, its good condition but I could probably get back what I paid for it.