I Beam type, load capacity is 2.3 ton; wheel track: 1750mm; spring center distance: 750mm Overall length: 2055mm Brake drum: air brake 310x 120 and 320x100; oil brake 310x80 is optional; Advantages: * more stronger for loading. * Track and spring center distance are seriation, more flexibility for application; * Brake shoe is wider, brake performance is better;