Continental Ruban Tire - 29 x 2.30 Tubeless Folding BLK SL PureGrip ShieldWall System E25Continental Ruban Tire 29 x 2. 30 Tubeless Folding Black SL PureGrip ShieldWall System E25. Ruban is an energy saving allrounder e bike tire that gets you to both Rural and Urban destinations. This tire is the partner for your daily commute running errands and weekend tours. Center tread keeps you rolling efficiently Outer knobs grab the ground when you need it in the corners Specifications: Flat Protection Tread and SidewallTPI 330Color Black