Created using new construction principles and with new high tech materials. Rolling resistance is now even further reduced by 10% compared to Ultremo R. Radial Technology. For the first time, our High Density Technology makes it possible to integrate a protection belt radialy into a bicycle tire. The tire retains its shapebetter. Internal friction and rolling resistance are reduced. Triple Nano Compound. A completely revised nano sized polymer base and fillers has made our triple compound even better. Small particles less internal friction. Improve your personal best by a factor of R. R Factor: Reduced weight: 180 g. Reduced Rolling Resistance: Radial Technology. Reduced puncture risk: High Density Guard. Note: Colored rubber compounds are good, but black ones are better. For the verybest performance in grip and durability choose the Ultremo R.1 in black.