We have a Touring and I always dreaded my wife curbing those wheels. I was never that fond of any of the Passport wheels anyway, and really would have preferred 18". After 2 wheels curbed, I put on the 18" wheels (option on the R/L and 3 lower trims of Pilot).
The 20" has a section width to rim clearance of 1/8+", and the 18" has a clearance of .5". And the ride is a lot better on 18's.
The 20" has a section width to rim clearance of 1/8+", and the 18" has a clearance of .5". And the ride is a lot better on 18's.