That is because normally, as most **** and European trucks are rated at 500mm LC which is 19.68" so they have converted it and just rounded it up. Its not just the Chinese. In Europe we rate in KG so a 2500kg machine will be rated @500mm LC but the equivalent US machine would be a 5000lbs a 24" (2267kg at 600 mm LC) So the lost 233kg is due to the 100mm of extra load center.
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