My HT weighs in at 22lbs (10kgs) built around a £99 SAB carbon frame (Planet X special), 100mm RockShox SID’s, XT set-up (1×10 and brakes), carbon bars and seat post, 26″ superstar wheels. All up cost less than £800 to build. Could go lighter by changing pedals and going tubeless but suits me fine. It’s fast and flickable. Only used for XC and the occasional XC race – wouldn’t want to launch it off any big jumps though.