are there any lift spacers for rear struts only? want to lift it up no more than 1" I just have LPG tank installed in trunk it makes constant load on rear part and car is always tilted back a little especially when I have two tanks full and 4 people inside
I would just get stiffer springs for the rear. That way you aren't changing suspension geometry all that much from stock. This is pretty usual for trucks that tow/haul. I wouldn't add spacers or anything like that.
If you are still running stock springs, just go to any of the Renegade retailers and purchase a set of the rear "lift springs". Eibach, ATP, AVID, Renegade Ready all sell these. All you need are the rears because you won't be changing anything else. Spring install is pretty straightforward if you were planning on doing it yourself. I'm sure it's not prohibitive if you were going to have a local shop do it, but strut/spring systems are pretty easy for a DIYer. If you want the "best" springs, I would highly recommend just punching in a search for "springs" or "lift springs" in the forum search bar and read through other Renegade owners' experiences. I'm sorry I don't have a ton of experience on this platform to give you a specific recommendation.