The Adventure features an aggressive, directional tread design with lots of working edges to provide grip on difficult or slippery terrainRound overall profile paired with a consistent centerline tread make for low rolling resistance should you find yourself on a paved surface E25 - are rated for use with E-Bikes up to 25kph (15mph)Standard20x4.0406WireBk/Blk30127860EBIKE25NoUPC/EAN/GTIN: 6933882533004