Will the Ultra 50K fit my truck?

It uses a 6x139.7 bolt pattern, which covers many full-size and mid-size trucks and SUVs. Bolt pattern alone isn't enough: check brake clearance, backspacing and suspension before buying.

What does the -6 offset do?

A -6mm offset moves the mounting face inward, so the wheel sits slightly farther out than a zero-offset wheel. That gives a wider stance, but on some trucks it can push the tire close to or past the fender.

Is a 16x8 wheel good for a truck?

It keeps a taller sidewall, which helps ride comfort and protects the wheel on rough roads. It won't fill large wheel wells the way a 17- or 18-inch wheel does.

Is this wheel forged or cast?

It is a cast aluminum wheel, not forged. Cast wheels are heavier and less strong than forged ones, but they cost less and handle normal truck duty well.

Does it come with lug nuts and a center cap?

Hardware is not confirmed here. Ask the seller whether lug nuts, a center cap and TPMS compatibility are included before ordering.

Can I use my stock tires on it?

If your stock wheel is also 16x8, the same tires usually fit. If your stock wheel is narrower or wider, check the tire's approved rim width range first.