Summit Ultramax HP A/S 235/50R18 101W XL OVERVIEW The Ultramax HP A/S from Summit is an ultra-high performance all-season tire engineered for high-speed performance cornering and braking. The aggressive tread pattern features 4 high angle grooves to channel water away from the tread face maximizing traction on wet surfaces. Tapered tread edges provided improved stability even tread wear and a quiet comfortable ride. The Ultramax HP A/S delivers the perfect balance between ultra-high performance and everyday comfort to give you confidence in all weather conditions.