Underground's new Paradigm–S model wheel incorporates a conical shape with their grippy, flat-resistant urethane. They make the Paradigm–S in both 52 and 54 mm and the conical shape gives a feeling of greater contact than rounded edge wheels. Both sizes are in 101A durometer hardness which is bit more responsive than softer formulas. The Paradigm-S like all their wheels is made in the USA and is among the best available. If you’ve been itching to ride some conicals these are your ticket.