So, according to this Toyota dealer website, this appears to be an 18" Toyota wheel that fits the Bz4X: Toyota BZ4X Wheel, alloy. WHEEL, DISC. Confirm the OEM - 426110R510 | Toyota Parts Overstock, Lakeland FL
I searched for the part numbers and many dealers sell it for about $400. The specs for the wheel aren't given, but this one indicates that it fits 2020-2022 Highlanders: 426110E510 - Wheel. Disc; disc (for spare) - Genuine Toyota Part
Searching Tirerack for wheels that fit the 2022 Highlander, it returns a number of 18, 19, 20, and 21 inch options: https://www.tirerack.com/wheels/res...l=Highlander+FWD&autoYear=2022&autoModClar=LE
I didn't review all the specs, but the first one I looked at seems to match the specs @majorhawkm
found, albeit a tad wider:
Offsets vary from 30 to 40 mm.
So, at least it looks like the bolt pattern is standard and it appears possible that existing aftermarket wheels could work, but will have to confirm all the specs. I also wonder if even a slightly different width and offset than factory wheels could be an issue, esp. for those of us who want to keep the warranty intact? Maybe someone knows a good wheel supplier who can investigate? Would also be nice to confirm that the first link above, indicating the part number of Bz4x wheel replacement, is correct.
I would like to get a set for winter tires and have the 20" rims for summer, but 20" winter tire options are limited (seems to be an odd size), but there are many more for 18". Aesthetics aside, are there any down sides to going 18" v. 20"? I gather smaller rims will tend to provide a softer ride because of the higher tire profiles? But will that also mean more rolling resistance and less efficiency? What about traction?