Exercise bike Front/rear stablizer: 50*1.5mm Front/seat post : 50*1.5mm Frame tube : 60*30*1.5mm Building size: 650*500*1110mm Feature: Flywheel: 6kg ( diameter 200mm ) Magnecic brake system Adjustable tension for varied resistance:1-8 section N.W/g.W: 23kg/25kg Packing Size: 610*220*490 Container: 20ft: 430pcs 40ft: 880pcs 40ft hq: 950pcs