The 1/10 scale 5-spoke RC wheel is designed for use with a 12mm hex on RC vehicles. It has a diameter of 3.15 inches, which is the overall size of the wheel when measured from one edge to the opposite edge. The width of the wheel is 1.6 inches, indicating the measurement from one side of the wheel's tread to the other.

The wheel features a center hole with a diameter of 0.2 inches, allowing it to be mounted onto the axle or hub of the RC vehicle. The center hole is designed to accommodate a 0.2-inch diameter shaft or spindle.

This wheel design is commonly used in 1/10 scale RC models and provides a balance between performance and scale appearance. The 5-spoke design adds a touch of realism to the RC vehicle, mimicking the style of wheels found on full-scale vehicles. The 12mm hex interface ensures compatibility with a wide range of RC vehicles that utilize this standard hex size for wheel mounting.

Overall, this 1/10 scale 5-spoke RC wheel with a 3.15-inch diameter, 1.6-inch width, and 0.2-inch center hole offers a realistic appearance and functional performance for RC enthusiasts.