Sold as a set of 4 wheels.

Hight: 68mm

Contact Patch: 43mm

Bearing Hub: Center Set

Lip Profile: Rounded

The Seismic Tantrum takes the EC (Energy Conversion) and tweaks it with a special "Fin Trimmed" version.  This still give you the solid wide core while saving weight.  

This wheel currently comes in two urethane formulations.

78a Mango DEFCON: Stoneground, with a super fast roll speed, smooth consistent slides, with a defined easy realease

81a Mint DEFCON: Stoneground, with a super fast roll speed, minimal grip, and ultra-smooth slide

81a Premium Clear: Fast rolling initially grippy wheel, that breaks in to a sugary slide when the skin is worn off.