The LC2100 series is mainly designed to operate in industrial, mining, infrastructure and public works projects and is one of the most successful series from Linden Comansa. The R&D team of Linden Comansa has worked to optimise various models of this series. The 21LC335, 21LC550 and 21LC660 cranes with a maximum load capacity of 18 tonnes have been optimised to load up to 20 tonnes. In the case of the 24-tonne 21LC550, the maximum load capacity is increased to up to 25 tonne. In addition, the load chart has been optimised. In the case of the 21LC550 25t, the replacement of the hoist cable has increased the drum capacity from 640 to 720 m in the standard 65 kW motor and optional 110 kW motor, and from 1,450 to 1,580 m in the optional 110 kW motor with a high-capacity Lebus drum.