8 Inch Trailer Wheels come in three common widths. It is important that you choose the correct width rim for your tire, else it may not fit. These trailer wheels are 5.375" wide and are designed to fit specificially tire sizes: 165/65-8 and 16.5x6.50-8 trailer tires. These wheels are commonly found on snowmobile trailers and other small utility and boat trailers. They are available in 4-Lug and 5-Lug and are standard replacements for most trailers.