Interchangeable Wheels?

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2016 Mazda CX-9
Hi everyone,

As you may all know, I own a 2016 CX-9 equipped with the factory 20-inch wheels. I’m considering installing the 21-inch wheels from the CX-70 and wanted to confirm compatibility. From what I understand, both vehicles share the same 5x114.3 bolt pattern, but I’m unsure about other potential fitment issues such as offset, hub bore, brake caliper clearance, and overall wheel-well clearance with the larger diameter.

In addition, would the existing lug bolts and wheel locks from my CX-9 work with the 21-inch CX-70 wheels, or would I need different hardware?

Has anyone attempted this swap or looked into whether the CX-70 wheels are a direct fit on the CX-9 without requiring spacers or modifications? Any insight on whether the OEM tire sizes would work without rubbing would also be appreciated.

Thanks in advance,
Shawnee
 
My biggest concern is that the CX-70 has a 9.5” wide wheel with a 45 mm offset. That’s going to give you about 179 mm / 7.05” of wheel backspacing. I’m not familiar with how much kingpin clearance the CX-9 has, but I’d bet that the CX-70 wheels are going to test it.
 
According to wheel-size.com

The CX-9 20 inch wheels are 8.5J x ET 45
CX-90 21 inch are 9.5J x ET 45

When you compare the wheels the CX-90 rim will stick out 1/2 inch on both side (towards the outside and the inside). That is probably fine but check the clearance on your CX-9.

I don’t recommend using the CX-90 tires size though, you can search on this forum what size people are using for their 21 wheels.

Also, OEM wheels are typically really expensive, you can probably find some good alternatives for a better price or higher quality for the same price ( unless someone is selling their OEM wheels)



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I rescind my previous statement of reservation. Tire Rack will sell you a 22 x 10" wheel with a 42 mm offset. That's 182 mm / 7.17" backspacing, or another 1/8" more than what you'd have with the CX-70 wheel.
 
20x9.5 +45 will just fit on a CX-5 so it should fit on the CX-9, but a lot depends on the tire. If you go with really beefy tires (relative to OEM), don't be surprised if you get rubbing.
 

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