The Hydrogen Spectre Rollerblade Wheels are designed to enhance your swivel trick skating experience. They're snappy, fast, and responsive on transitions and feature a bulletproof profile that can go the distance without taking a serious beating. Their hydrogen construction has been time-tested to offer the ultimate balance of speed, grip, and normal wear without the price tag. Offered in a pack of 4 at 76mm in width, these rollerblade wheels make an excellent companion for speed skaters seeking new tricks with reliable performance.