Alcoa announced it has updated its comprehensive product handbook known as the 2013 Alcoa Commercial Vehicle Wheels Spec Data Guide Catalog (Spec Data Guide). The Spec Data Guide features a complete product portfolio, including 45 wheel part number "families" with corresponding finish options for heavy duty (tractor and trailer), wide base, bus and medium duty fitment applications. This annual update now includes cross-reference information to obsolete part numbers up to two generations back where applicable and full technical data, including mounting system, offset and load rating data.