I am looking to buy a (Canadian) 22 RDX A-Spec and I am hopeless about tire sizes. I currently have a 2018 TLX A-spec and have both winter and all-season tires. The winter tires (on rims) are still in excellent condition. I doubt I can use the old winter tires on the new RDX but thought I'd check in to see what others' experiences have been.

The Winter tires I am hoping to "re-purpose" are Bridgestone Blizzaks size 225/50R18.

I know the new RDX A-spec has 20 inch all seasons (I think the standard is 255/45R20?), but the base model has 19 inch. Regardless, is there any way I can use my 18" 225/50R18 snows from my current TLX or will I just have to sell them privately and take my lumps?

All advice welcome, with thanks.

 

Take your lumps.

· 255/45-20 tire has a 29.0” diameter

· 225/50-18 tire has a 26.9” diameter

 

Well, I assumed all along that this was going to be incompatible, but as I said, I have a mental block with all things tires sizes

The reason I was even a "bit" hopeful was that, although the A-Spec is a 20" wheel (255/45R20) I noticed that the Base model (Canada) of the RDX was actually a 19" wheel (listed tire size as 235/55/R19) so I wondered if my 18" snows might be accommodated since I almost always went down a size for winter tires anyway where compatible. I have no idea about physical dimensions of brakes and disks and calipers etc so maybe that also makes it a bridge too far. Oh well, can't blame a guy for hoping!

 

 

Got the exact same wheels - putting them on today.