I have City 5 Plus but this probably applies to all RAD bikes. Rear brake spongy. Watched several videos and I think I need to bleed line.

Trying to find info on Nutt brakes and can?t find any info. Looking for bleed kit and replacement pads. RAD parts do have pads for $25/pair which seems high when compared with what I can get on Amazon. I ordered bleed kit from Bleedzone.com on Amazon but the bleed tube screw in connector was too large for lever and caliper ports. Called Bleedzone and they are sending smaller connector. Hopefully it will work.

Considering putting different brakes on my 2 bikes. Anyone replaced?

I have City 5 Plus but this would probably apply to all hydraulic rear brakes.  Have had bike 1 1/2 years with no problems.  Rear brake just started making a clicking sound when applying hard full brake.  Sounds like it's coming from disc/drum area??  When lightly applying brake, there is no clicking.  I tried to duplicate the sound while stopped by leaning bike up on kickstand, using full throttle and then applying brake.  No clicking.  I can only hear it when rolling at a good speed and applying brake.  It clicks until come to complete stop.  Maybe something rubbing, need adjustment, ??