Brand new crystal gym commercial heavy duty exercise spinning bikes spin bikes Spinning bike Material: Steel & tube (Dim 30*70MM) Handbar: Dia 25MM Seat post: Dia 38MM Flywheel Weight: 18KG Spinning bike Colour: Yellow/silver/white Cosole: Speed, Time, Distance, Calorie, Scan Product Features : 1. Using steel and iron as material, and be thicker and more sta...