How do you know what size Wheel Tub to get? First, you measure the outside
diameter of your tire, or its total height in other words. You then add 4
inches to your tire measurement. This will give you 2 inches of clearance
all the way around your tire. For example, If you measure a 20" wheel and
tire, you will get a measurement of about 27.5" to 28". The size tub you
would need is a 32". The stock width of our tubs is 14". That gives you
plenty of extra tub to trim down for a perfect fit. If you need a wider tub
for some reason, just give us the measurements and we will be more than
happy to build it for you.