ROTA GRID EXTREME 20X8.5X6H/139.7 Plain Silver Royale Lip Groove

1. ROTA Grid Extreme: This identifies the brand and model of the wheel, which is manufactured by ROTA.

2. 20x8.5: These numbers represent the dimensions of the wheel. "20" indicates the diameter of the wheel in inches, and "8.5" signifies the width of the wheel in inches.

3. 6H/139.7: This part of the specification refers to the bolt pattern of the wheel. "6H" indicates that the wheel has a 6-lug bolt pattern, meaning there are six bolt holes. "139.7" denotes the bolt circle diameter in millimeters, which is the diameter of an imaginary circle drawn through the center of each bolt hole. In this case, it's 139.7 millimeters.

4. Plain Silver Royale Lip Groove: This describes the finish or color of the wheel. "Plain Silver" suggests a standard silver finish, while "Royale Lip Groove" could refer to a particular design element, likely a lip groove detail.

So, the "ROTA Grid Extreme 20x8.5x6H/139.7 Plain Silver Royale Lip Groove" wheel is a 20-inch diameter, 8.5-inch wide wheel with a 6-lug bolt pattern and a bolt circle diameter of 139.7 millimeters. It comes in a plain silver finish with a design detail described as "Royale Lip Groove". These specifications are essential for ensuring proper fitment and aesthetics when installing the wheels on a vehicle.