2UP Extended Seat for Ariel Rider X-Class.Seat Size (24" Long x 4" Front x 6 1/2" Rear) Front - approx 2 3/4" thick Rear - approx 3 3/4" thick; Marine Grade Vinyl · Black · Distressed Black · Red · Caprice · Cafe · Rust Brown · Distressed Pecan · Distressed Brown · Saddle · Dark Brown · Pink; Stitch Style · Caterpillar A (Full Diamond). The classes include: Class 1: The Class 1 e.