Bear Grizzly 181mm 8.52 Gen 5 Longboard Skateboard Truck (Iridescent) The Bear Grizzly 8.52 have been revamped to focus on strength, versatility and weight reduction. The 5th gen truck has a stronger heat treaded axel, revised and less restrictive bushing seat as well as a laser engraved logo. The baseplate now features an 8 hole mounting system to accommodate both old and new school drill patterns.