RichSNJ
Well-known member
So I am eagerly awaiting my '22 GCL Summit Reserve with the 21 inch wheels and tires. I currently have a '19 GC O HA with 20 inch wheels and the Pirelli Scorpion Verde M+S tires, and honestly they're ok for light snow, but nothing major and certainly not for anything muddy, as I learned after Hurricane Ida came to town last year.
In addition, I've been watching lots of videos saying how bad 20 inch and over wheels are for doing anything that's not on pavement. For instance, I watched a video where they compared a Bronco to a Wrangler to a Land Rover on an off road course, which really had nothing super serious on it. The Land Rover had 20 inch rims and they blew a tire going over a small rock (maybe 3-4" tall) which happened to be angled in such a way that the 20 inch rims weren't happy with it, but looking at it from my armchair position, it really didn't seem like something which should have blown the tire. They put the spare on, and it immediately blew the tire even though they were going super slowly and carefully over the rock. They had to abandon the Land Rover on the trail and go back for it a couple of days later. Meanwhile the Bronco and Wrangler, both with 18 inch wheels, had no issues. The presenters said that they weren't that surprised because the low profile tires on 20 inch rims don't have the give to take any kind of serious stress, while the 18's would have no issues. I've seen other presenters say the exact same thing.
To that end, I'm seriously considering purchasing an extra set of 18 inch wheels with K02 tires on them to be used mostly in the winter. Does anybody on here do this?
My concerns are the TPMS sensors and speedometer calibration. I think that the TPMS sensors automatically get picked up by the car with no user intervention, but I'm not sure if that includes switching between 2 complete sets.
The speedometer is a different story. The '22 GCL spec sheet lists the "Revs" for the various wheel size options on each trim. I think it's like 419 for the 21" and 422 for the 18". Is this something that can be easily entered into the car system somehow? I've heard that there are various OBD systems that can do this based on known distance driven, but that they may not work because of the firewall on FCA cars... I don't want to have to go to the dealer every time I want to switch wheels...
In addition, I've been watching lots of videos saying how bad 20 inch and over wheels are for doing anything that's not on pavement. For instance, I watched a video where they compared a Bronco to a Wrangler to a Land Rover on an off road course, which really had nothing super serious on it. The Land Rover had 20 inch rims and they blew a tire going over a small rock (maybe 3-4" tall) which happened to be angled in such a way that the 20 inch rims weren't happy with it, but looking at it from my armchair position, it really didn't seem like something which should have blown the tire. They put the spare on, and it immediately blew the tire even though they were going super slowly and carefully over the rock. They had to abandon the Land Rover on the trail and go back for it a couple of days later. Meanwhile the Bronco and Wrangler, both with 18 inch wheels, had no issues. The presenters said that they weren't that surprised because the low profile tires on 20 inch rims don't have the give to take any kind of serious stress, while the 18's would have no issues. I've seen other presenters say the exact same thing.
To that end, I'm seriously considering purchasing an extra set of 18 inch wheels with K02 tires on them to be used mostly in the winter. Does anybody on here do this?
My concerns are the TPMS sensors and speedometer calibration. I think that the TPMS sensors automatically get picked up by the car with no user intervention, but I'm not sure if that includes switching between 2 complete sets.
The speedometer is a different story. The '22 GCL spec sheet lists the "Revs" for the various wheel size options on each trim. I think it's like 419 for the 21" and 422 for the 18". Is this something that can be easily entered into the car system somehow? I've heard that there are various OBD systems that can do this based on known distance driven, but that they may not work because of the firewall on FCA cars... I don't want to have to go to the dealer every time I want to switch wheels...
