Any recommendations for tyres for a 27.5 trail bike for rocky conditions? Currently I'm running conti x-King protections (2.2) at 1.7 and 1.8 bar (front and back), and they well and truely suck at getting up loose rocky climbs. Can not lower the pressure more as I'm a solid 97kg and it feels like I'm already on the limit of how low I can go... I guess, from a more important point of view of actually trying to understand what's happening, can someone comment on the type/size of knobs required for loose rocky terrain in order to have better traction?
