how low can i go?

hey i want to know from people who have exp how much can i lower my 2003 dakota R/T with 20's before i get major rubbing. and if rubbing really isnt preventable what do i need to change to stop the rubbing?

If you can't make it over the speed bump, your to low. If you are at a ricer event and they like your ride that low, then your to low!

you could maybe go 5 1/2 in. but with 20" i dunno how much rub ur gonna get cuz i have a 5 1/2 on mine and i only put 18s" on it