I'm using a combination of 18" rims w/the H&R. No gap. Plus I'm also using the Tokico HP's. Prior to the H&R I was using Drop Zone coils. Which were a little taller. Neither coil is the perfect solution. The Dropzones were better for lower speeds(<55mph) on local streets. But on the highway a little waviness would cause U to rebound out of your seat. The H&R's R a firmer ride all around.