do you need a tow bar for a bike rack

If your SUV, or Jeep has a spare wheel on the back of it, you will need a Spare Tire rack, since you normally can't fit a rear mounted bike rack. Spare wheel mounted cycle carriers, or rather, spare tire racks attach to the wheel instead of the trunk, so you can carry your bikes without fitting a tow bar. No need to fit a tow bar or roof bars at all, which makes it easy on and off.