Louie Lopez Pro Model Durable all-purpose truck for any type of skateboarding. 55mm tall for optimal performance and wheel clearance with wheels 56mm and under. A356 T6 Aluminum Hanger & Baseplate The best lightweight aluminum alloy heat treated to T6 condition for strength, durability, and grind feel. SCM435 Chromoly Steel Axle: Highest quality and durability available. Grade 8 Kingpin: Never break, never bend. 159 model features 6-hole universal baseplate with old and new school mounting pattern.