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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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.
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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.

LQQX50
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Car: '16 QX50 Malbec Black 3.7 325HP
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Re: Wheel downsizing

Postby LQQX50 » Thu Dec 10, 2020 1:54 pm

The Tires are too NARROW ~ Resulting in a less than desirable feeling of sure-footedness.

My '16 with the 19" OEM Split 5 Spoke came with OEM Bridgestone Turanza EL P245 / 45 / 19 tires.

Road grooves and surface imperfections seem to just swallow up the narrow tires and send feed back to steering wheel.

With just 13,000 miles on the car and original tires, I can wait to to get wider tires when replacement time comes.
That will be my route to attempt to improve the ride quality and gain a sense of better handling.

Nothing like a Pandemic to keep me working from home and away from putting on fun commuting miles on the QX50 . . .

Agreed, the Factory 18" wheel looks old and tired as it's been around since '07, the 19" looks a bit better, but still lacks a " Beefy " appearance.

Check out some wheels from other Infiniti or Nissan Models :yesnod Believe it or not, some newer Murano Designs would look good on your '16 QX50 :dblthumb:

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AZhitman
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Re: Wheel downsizing

Postby AZhitman » Thu Dec 10, 2020 5:52 pm

^ Good suggestions.

Keep in mind, too much wider can lead to tramlining or too much sidewall flex (tires should be within the recommended size for the wheel width).

Too narrow is no good either. Don't stray too far from the original OD, as that's what the ABS and TCS are calibrated for, as well as your speedo and odo - It'll cause all sorts of mayhem if you get too far out of spec.

LQQX50
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Joined: Mon Aug 26, 2019 3:48 am
Car: '16 QX50 Malbec Black 3.7 325HP
Location: Lake Michigan's South Shore

Re: Wheel downsizing

Postby LQQX50 » Fri Dec 11, 2020 2:58 am

Agreed on not straying too far from factory tire Dimensions, especially the OD.

As far as width goes, the Bridgestone Turanzas that came on the car from Japan are 27.7" OD x 8.2" Wide

Tire Rack Consumer Reviews rip them them apart too for multiple reasons besides my gripe of feeling " too narrow " for the car.

Come replacement time, won't stray too far for original specs in OD, but will go with wider width up to an inch.

If ever bored and want to tire shop online :crazy: the varying consumer reviews that praise and slam the same tire are all over the place.

One other note . . . Proper inflation is key to reducing ware and keeping up optimal handling . . check tire pressure often and keep it at the recommended PSI . . . it really is amazing how just a few pounds difference can affect handling manners.


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