This is a pair of 1/8 scale buggy wheels with offroad square pin tread pattern and chrome rims. They are standard replacement for several Riverhobby vrx 1/8 electric and nitro buggies.
These wheels will fit many other 1/8 scale buggies etc using 17mm hex mounting.
approx diameter: 115mm
approx width: 42mm
River Hobby Spares are also used on FTX RC brand cars , check title for FTX part number