Ion Alloy 171 Polished Wheels are one-piece cast wheel built with superior design and crafted from high-strength aluminum alloy. These wheels are lightweight but unbelievably stronger than any other wheels. It has been tested under toughest condition. Ion 171 features an 8-hole style in deep setting rim with 2-step outer rim lip. Finished off with mirror like polish and crowned by matching polished Ion-branded center cap. Available in 15", 16", 17", 18" and 20" rim sizes. Ion 171 wheels are built to meet the highest standards of ISO 9000, OEM, SEA, JWL-T, VIA and TUV.