Greetings all!

Im new to the Hyundai community after buying a 2018 Tucson. I really enjoy my suv, however I want to change out the 17" wheels for perhaps the larger oem 19" wheels. What changes to my vehicle will happen if I decide to go this route?

Thank you in advance!

 

Welcome to the forum.

 

It's not just the rims, it's also the tires. If the rims get larger the tires must have a lower cross section. That means there is less space between the contact patch and the rim. The ride is less cushy and cornering is more crisp. You can have a preview by raising the tire pressure of you current tires to the max. Maximum pressure is imprinted on the sidewall, recommended pressure is shown on the label in the door jamb area.
The lower cross section also means that the tire is more likely to be damaged when you go over sharp edged things like big pot holes and curbs.
If your new tires are also wider you need to check clearances to the body. The tires may interfere with the fender or suspension parts.

Now the rims: There is a measurement called offset. A rim with higher offset than OEM will narrow the track width, and a rim with lower offset will widen the track width. Some will say that wider is better and that would be inaccurate. The steering is designed with a fixed scrub radius. If you change the offset either way that scrub radius is also changed. You can feel that in the way the car reacts to ruts and uneven bumps in the road. You may have to hold on to your steering wheel harder to keep the vehicle on track.
If you go to the tire rack website you can find some more information.

 

If your speedometer is accurate right now, once you change tire wheel size speedometer accuracy can be affected.