The training Tyre A tyre for mixed terrain. Provides excellent grip/rolling resistance compromise and efficiency when cornering or leaning over. More massive blocks in the centre, close enough to enable the tyre to roll efficiently but sufficiently spaced out to make it self-clearing. Michelin Wildgrippr 2 MTB Tyre Specifications: Inner Tube: C4 (2.1), C5/C6 (2.25). Weight: 610g (2.1x26), 680g (2.25x26). TPI: 60. Pressure (Bar): 1.8/4.