LEGO 6851 Tri-Wheeled Tyrax Set Parts Inventory and Instructions - LEGO Reference Guide
Neo Space Blacktron 6851 Tri-Wheeled Tyrax Squad. Only reason I could see for a tricycle would be a mounted gun on the back. Should easily be able to modify it to have
LEGO Space: Tri-Wheeled Tyrax (6851) for sale online | eBay