Wheel downsizing

Discussion of Infiniti's amazing (and underrated) sport-luxury crossovers, the EX35 and EX37. For 2014, the EX series will be renamed QX50, in line with Ininfiit's new naming conventions.
Eric.
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Joined: Fri Dec 13, 2019 6:07 am
Car: 2016 Infiniti QX50 RWD

Wheel downsizing

Postby Eric. » Tue Aug 25, 2020 11:17 am

I have a '16 with factory 19" wheels and reasonably complaint tires (Michelin Primacy MXM4s). Even so, the ride is too brittle for my tastes. It rides less comfortably than my old G35S. I've played with pressures, and that doesn't make much of a difference. I'm sure some of it has to do with the suspension, but still. It's not great.

Has anybody downsized to a 17" or 18" wheel? If so, did the extra .5-1" of sidewall make a noticeable difference? I've never driven a QX50 with the 18" wheels, so I have nothing to compare to. I'd go with something used from Infiniti, likely off of a Q50.


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AZhitman
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Re: Wheel downsizing

Postby AZhitman » Tue Aug 25, 2020 1:24 pm

Definitely doable, and a 17" wheel with taller sidewall will definitely result in a smoother ride. The Primacy aren't super-soft, so that's not helping.

I'd look at whatever's on the "base" model QX50 and go with that package, because you know the overall diameter will be the same, and clearance will be good.

I'd bet money someone out there is willing to do a trade, especially 17" for 19". Craigslist (or here) are good places to start.

Eric.
Posts: 12
Joined: Fri Dec 13, 2019 6:07 am
Car: 2016 Infiniti QX50 RWD

Re: Wheel downsizing

Postby Eric. » Wed Aug 26, 2020 6:54 am

Thanks for the info. I'm not a huge fan of the 18" QX50 wheel design, otherwise I'd definitely go that route.

My other thought was to replace the Michelins (they have 3k miles, so are worth a bit used) with something like a P-Zero A/S Plus, but at that point, I'm half way to smaller wheels and some more sidewall. In addition to ride quality, smaller wheels/tires will improve MPG a touch and maybe give me back some steering feel. Ill probably go 235/50 18... not exactly the same OD as the 19s, but there's a lot of options vs. the slightly taller sidewall 225/55 18" OE size.


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