5.70 - 8 is the tire size. Tread is worn. The Wheel is 8 inch and will also fit the smaller 4.00 - 4.80 x 8 tires.
This is a 4 Bolt wheel. I have 5 bolt wheels as well. Cleaning out the garage.
The wheel is made by Nanco They also make tires for all size Trailers - That's what they are Known for. This is a Nanco Tire and is a C Ply Rating - HD - Meaning it is Heavy Duty. It takes up to 75 lbs. of Air and will carry 1200 lbs by itself ~ Some trailers require heavy rated tires and if you just typically Overload your trailer then this tire is for you, even if you purchase it just for a spare tire.
My husband has a few other tires and wheels that are similar to the one pictured, that is the Best-Looking wheel he has. He has a few other tires that have much more Tread on them, they are the same size 5.70 - 8.
Come and take a look. He has numerous wheels/tires that you can look at while you are purchasing this one.
He also has 3 or 4 Trailer Tires size 4.80 - 8 as well some used and 2 NEW Ones