ABEC 11 Longboard Skateboard Wheels - Classic BigZig 81a 75mmThe Classic formula BigZig is better for sliding and drifting compared to the Reflex urethane, but gives up a bit of traction as well as durability. It's an amazing wheel for carving and cruising and will help you roll over the roughest of terrain. This wheel is great for use on rough roads and street where it's hard to roll comfortably. Height: 75mm Durometers: 81a Width: 56mm Contact Patch: 56mm Hib 25mm Hub Setting: OS Offset Depth of Urethane: 22.