Just change the font configuration as below:
URxvt*font: xft:Agave:pixelsize=24:minspace=False, xft:DejaVu Sans:pixelsize=18
URxvt*boldFont: xft:Agave:pixelsize=24:minspace=False, xft:DejaVu Sans:pixelsize=18
URxvt*letterSpace: 0
Reload.
xrdb ~/.Xresources