Well, for me one of the first upgrades are an extra set of offroad wheels and tires. I had to do some research and testing to find this information.
The wheel and tire information on the individual models can be found on the jeep website. I'm only listing the TrailHawk here. The hub and stud specs should be the same across all models.
Wheel & Tires:
17" Aluminum Offroad Wheel (no information on offset or width)
Goodyear Wrangler 215/65R17 All Terrain Tire
Bolt Pattern: 5x114.3 (5x4.5 is considered the same size)
Hub Size: *I need to look up how to measure it and have some time to remove the wheel and measure it on the Renegade.
* The tire sits real close to the spring perch. Anything bigger may cause rubbing issues. So keep in mind the offset and width. Wheel spacers may be needed. Note that the Renegade Limited uses 18" wheels and do not have the added .8" lift that the TrailHawk has. The limited may be using a different offset on the wheels and/or the tires are not as tall.
Camera in front of the tire:
Camera on top next to the spring looking down:
Camera from the outside looking in:
Hub and Studs:
The Renegade uses a Bolt/Stud style lug nut. It is size 17mm. You can see the length in the picture below. It is the very top one. The thread pitch size is 1/2x20. It is the same as the Compass and Patriot, but those 2 cars have the more common studs pressed into the hub vs the Renegade's bolt/stud lug nut.
* Thread pitch: 12x1.5 or 12x1.25 will not fit. The Renegades threads (1/2x20) are finer and closer together than the 12x1.5 shown in the picture. The 12x1.5 threads are wider apart. Hopefully the picture is clear enough for you to see the difference. I tired putting the 12x1.5 lug nut onto the Renegade's 1/2x20 lug stud and it did not fit as well.
Looking at the Renegade's lug bolt head it will easily clear a 1" spacer. Any spacer smaller than 1" will not come with the new set of studs. You would use the original lug bolt, but I would recommend using new extended lug bolts to make up the difference the -1" spacer would create. If you use a 1" or larger spacer, the spacers come with new pressed in studs at whatever thread pitch you want. You don't want to use extended lug studs on a spacer that is 1" or larger. The longer the stud the easier it is prone to breaking. That's why any spacer that is 1" or larger comes with a new set of short/normal length studs installed. When you want to add a 1" spacer to a more common hub that has the studs pressed into the hub, you usually run into the problem of the studs sticking out longer than the 1" spacer. This will prevent the wheel from sitting flush with the spacer, but instead hit/sit on the studs. You would need to cut the studs shorter for clearance. With the Renegade, I don't see this problem with the length of the head on the lug bolt with a 1" spacer. With any spacer I recommend a hub centric and wheel centric spacer. Hub centric means that the larger center hole on the spacer is cut to fit perfectly onto the center of the hub on the car. The spacer should not be able to slide/move around once seated flat on the hub. Wheel centric means that the outside facing part of the wheel spacer is cut to fit the large center hole on the inside of the wheel. Having a spacer that has both hub centric and wheel centric will guarantee proper fitment from your hub to the spacer to the wheel. Without this proper alignment you risk the studs breaking and the wheel coming off. You will also notice vibration and poor steering wheel feedback. There are spacers out there that will not have hub centric or wheel centric cuts. Or they will have one or the other. Make sure the ones you want the purchase have both to match your setup. With all that being said the common consensus on spacers is that there is always a risk of failure. Wear and tear, cheaply made, and improper installation can cause failure. Some don't recommend using spacers at all and recommend you buy the proper offset for whatever your wheel you purchase. Sometimes that option isn't available and we have to turn to wheel spacers.
** Out of time, more to come. Or please feel free to add or correct any information.