Russian Museum of Art_Sergei Isupov _ Photo Credit John Polak_32931_Free Ride_front72dpi Sergei Isupov, Free Ride, 2012, porcelain, slip, glaze, 20.5 x 14 x 6". Sergei Isupov, Free Ride, 2012, porcelain, slip, glaze, 20.5 x 14 x 6″.