China real crawler undercarriage manufacturer As a track undercarriage manufacturer,we promise our customers 1.on time delivery time 2.Competitive price with best quality 3.provide custom design according to customers request. 4.12 months product warranty 5.24 hours on phone service 6.after sale service:Spare parts service guaranteed, absolutely fa st and efficient able to reply in real time to customer's need. Custom design: 1.track lenth,track shoe width,track undercarriage height etc,All the dimension can be made according to your requirements,and we also make proposal for you. 2.rubber track shoe type:we have various rubber track shoe type for your choice,rubber track,steel track,steel track with single stuffened grouser,steel track with rubber pad,steel track with bolt type,etc for the rubebr track shoe,you can also choose the color according to your specific request. 3.for the middle parts cross members,X frame (Excavator type) H frame with removable side frames Fixed undercarriages with cross beam are suitable for a wide range of application. X frames undercarriages are usually designed for excavator and represent the best balance between lightness and torsional rigidity of the steel structure. Undercarriages with central frame can be designed complete with hydraulic swivel joint and hydraulic connection to the motors, slewing ring and more optional.