Since I'm sure that at some point somebody will come looking for this...
All models use a 5 x 114.3 mm (5 x 4.5") hub bolt pattern. Offsets in the range of 35 - 50 mm should fit - you don't normally see wide wheels with high offsets that result in big backspacing. Hopefully someone can find out the center bore of the stock wheels...
Sport/Touring:
Stock tire - P225/65R17 100H
Stock wheel - 17 x 7J
Safe +0 tire fitments (all listed sizes will mount on a 7" wide wheel):
215/70R17
235/60R17
235/65R17
255/60R17
Safe +1 tire fitments and suitable wheel width for tire:
225/60R18 - 6.0-8.0"
235/55R18 - 6.5-8.5"
235/60R18 - 6.5-8.5"
245/55R18 - 7.0-8.5"
255/55R18 - 7.0-9.0"
Safe +2 tire fitments and suitable wheel width for tire:
225/55R19 - 6.0-8.0" (1)
235/50R19 - 6.5-8.5"
235/55R19 - 6.5-8.5"
245/50R19 - 7.0-8.5" (1)
255/45R19 - 8.0-9.5" (1)
255/50R19 - 7.0-9.0"
265/50R19 - 7.5-9.5" (2)
Safe +3 tire fitments and suitable wheel width for tire:
235/45R20 - 7.5-9.0"
245/40R20 - 8.0-9.5"
245/45R20 - 7.5-9.0"
255/40R20 - 8.5-10.0"
255/45R20 - 8.0-9.5"
265/40R20 - 9.0-10.5"
265/45R20 - 8.5-10.0" (1, 2)
Grand Touring:
Stock tire - 225/55R19 99V
Stock wheel - 19 x 7J
Safe -2 tire fitments and suitable wheel width for tire:
215/70R17 - 6.5-7.5"
225/65R17 - 6.0-8.0"
235/60R17 - 6.5-8.5"
235/65R17 - 6.5-8.5"
255/60R17 - 7.0-9.0"
Safe -1 tire fitments and suitable wheel width for tire:
225/60R18 - 6.0-8.0"
235/55R18 - 6.5-8.5"
235/60R18 - 6.5-8.5"
245/55R18 - 7.0-8.5"
255/55R18 - 7.0-9.0"
Safe +0 tire fitments (unless wheel mounting width is noted, tire will fit stock wheel)
235/50R19
235/55R19
245/50R19
255/45R19 - 8.0-9.5" (1)
255/50R19
265/50R19 - 7.5-9.5" (2)
Safe +1 tire fitments and suitable wheel width for tire:
235/45R20 - 7.5-9.0"
245/40R20 - 8.0-9.5"
245/45R20 - 7.5-9.0"
255/40R20 - 8.5-10.0"
255/45R20 - 8.0-9.5"
265/40R20 - 9.0-10.5"
265/45R20 - 8.5-10.0" (1, 2)
Note 1: Pirelli doesn't seem to think that the rest of the tire industry's standards for suitable wheel mounting width apply to them. There are quite a few Pirelli tires that have oddball width ranges compared to other tires of that size. I've noted where I ran across these in compiling this list, and marked sizes for which Pirelli has at least one offering with a different recommended mounting width. There are undoubtedly more, but this is just what I've run across so far.
Note 2: These sizes are somewhat questionable, but Continental's Tire Selector indicates that they're suitable fitments for a CX-5. They certainly meet the load rating requirement for the vehicle, but I'd keep an eye out for rubbing if anybody wants to try them.
As for bigger sizes - If anybody can find a 21" wheel that will fit the CX-5, I'll be happy to compile suitable tire sizes. Until that happens, I'm not bothering with it. Anybody who wants to put 22" wheels on their CX-5 can do their own homework - the load ratings on the tires are marginal at best, and the wheels are ridiculously heavy. I strongly recommend against it.
All models use a 5 x 114.3 mm (5 x 4.5") hub bolt pattern. Offsets in the range of 35 - 50 mm should fit - you don't normally see wide wheels with high offsets that result in big backspacing. Hopefully someone can find out the center bore of the stock wheels...
Sport/Touring:
Stock tire - P225/65R17 100H
Stock wheel - 17 x 7J
Safe +0 tire fitments (all listed sizes will mount on a 7" wide wheel):
215/70R17
235/60R17
235/65R17
255/60R17
Safe +1 tire fitments and suitable wheel width for tire:
225/60R18 - 6.0-8.0"
235/55R18 - 6.5-8.5"
235/60R18 - 6.5-8.5"
245/55R18 - 7.0-8.5"
255/55R18 - 7.0-9.0"
Safe +2 tire fitments and suitable wheel width for tire:
225/55R19 - 6.0-8.0" (1)
235/50R19 - 6.5-8.5"
235/55R19 - 6.5-8.5"
245/50R19 - 7.0-8.5" (1)
255/45R19 - 8.0-9.5" (1)
255/50R19 - 7.0-9.0"
265/50R19 - 7.5-9.5" (2)
Safe +3 tire fitments and suitable wheel width for tire:
235/45R20 - 7.5-9.0"
245/40R20 - 8.0-9.5"
245/45R20 - 7.5-9.0"
255/40R20 - 8.5-10.0"
255/45R20 - 8.0-9.5"
265/40R20 - 9.0-10.5"
265/45R20 - 8.5-10.0" (1, 2)
Grand Touring:
Stock tire - 225/55R19 99V
Stock wheel - 19 x 7J
Safe -2 tire fitments and suitable wheel width for tire:
215/70R17 - 6.5-7.5"
225/65R17 - 6.0-8.0"
235/60R17 - 6.5-8.5"
235/65R17 - 6.5-8.5"
255/60R17 - 7.0-9.0"
Safe -1 tire fitments and suitable wheel width for tire:
225/60R18 - 6.0-8.0"
235/55R18 - 6.5-8.5"
235/60R18 - 6.5-8.5"
245/55R18 - 7.0-8.5"
255/55R18 - 7.0-9.0"
Safe +0 tire fitments (unless wheel mounting width is noted, tire will fit stock wheel)
235/50R19
235/55R19
245/50R19
255/45R19 - 8.0-9.5" (1)
255/50R19
265/50R19 - 7.5-9.5" (2)
Safe +1 tire fitments and suitable wheel width for tire:
235/45R20 - 7.5-9.0"
245/40R20 - 8.0-9.5"
245/45R20 - 7.5-9.0"
255/40R20 - 8.5-10.0"
255/45R20 - 8.0-9.5"
265/40R20 - 9.0-10.5"
265/45R20 - 8.5-10.0" (1, 2)
Note 1: Pirelli doesn't seem to think that the rest of the tire industry's standards for suitable wheel mounting width apply to them. There are quite a few Pirelli tires that have oddball width ranges compared to other tires of that size. I've noted where I ran across these in compiling this list, and marked sizes for which Pirelli has at least one offering with a different recommended mounting width. There are undoubtedly more, but this is just what I've run across so far.
Note 2: These sizes are somewhat questionable, but Continental's Tire Selector indicates that they're suitable fitments for a CX-5. They certainly meet the load rating requirement for the vehicle, but I'd keep an eye out for rubbing if anybody wants to try them.
As for bigger sizes - If anybody can find a 21" wheel that will fit the CX-5, I'll be happy to compile suitable tire sizes. Until that happens, I'm not bothering with it. Anybody who wants to put 22" wheels on their CX-5 can do their own homework - the load ratings on the tires are marginal at best, and the wheels are ridiculously heavy. I strongly recommend against it.