Reflex Skateboard Wheels - ZigZags - 70mm/83a. The traction of a Grippin in an offset footprint. Excellent acceleration when pumping and awesome roll speed in GS. The urethane even sounds fast. Features - Height: 70mm - Durometers: 83a - Width: 53mm - Contact Patch: 51.5mm - Hub: 25mm - Hub Setting: OS Offset - Depth of Urethane: 22.5mm - Edges: Square - Disciplines: The faster larger hard-carving, pumping and slalom specific wheel. 78a for carver-cruisers. "Reflex" formulas for Slalom racing. - - Bearings and spacers not included. - Sold in sets of 4