chopcult - Sportster Tires...Whatcha Runnin'? - Page 3 firestone replicas. 5.10x16 rear and 4x19 front. These tires kind of feel like they have a little more bounce to them. The rear gets a little rub on the belt when it gets hot, waiting for sprockets to do a chain conversion for a better fit. They don't handle all that great. They tend to get a little wobbly on the rain grooved free ways, but most tires do, so I don't worry too much about it.