Our exclusive SuperPremium chrome and Stainless Steel is the reason American Chrome hub caps are a favorite with major OEM truck manufacturers. These hub caps are designed to survive the worst the road can throw you way, and come through shining. Style: Baby Moon Inside Diameter: 8-5/16″ Axle Size: 8-1/2″ Height: 2-7/8″ Lip Height: 1-3/16″ Fits Stud Size: 1-1/16″ Nut The inside lip of the hub cap is curled inward, and firm pressure during installation creates a tolerance fit between this edge and the exterior edges of the bolts on the hub plate. The thickness of this inside lip varies considerably depending on the model and its intended application. Chrome or Stainless Steel? SuperPremium Chrome is unmatched for it’s brilliant shine and high gloss look, and is the choice of customers looking for a stunning and eye-catching sparkle. Customers looking for a more durable solution, particularly those in northern climates, often choose our high-quality stainless steel to maximize the life of their investment.