Rumbling noise at 30mph and above is it the cv joints?

Try this.
Jack the car up and rest it on axle stands. You will be shaking the car so you will need it to be safe.
To test a wheel bearing. with the wheel off the ground, grab the wheel top and bottom. Rock it hard back and forward. Then grab the wheel at left and right. Again rock the wheel left and right. If it feels solid it's not likely to be the wheel bearing.
For the CV joint, lower the car and find a large, safe open area to drive in. Turn the steering hard left and drive at about 30mph in a tight circle. Do the same to the right. A CV joint will give a constant "clonk, clonk' noise.
A wheel bearing will make noise that isn't affected by steering but will change with speed. A grumbling, whine noise.
Worn CV joints only make noise at a full hard turn. All the way left / right with a little bit of speed.
Comment below please if this helped.

Kia is bad with wheel bearings ;.About 80 to 100k they start going bad. You have to check them physically with a dial gauge or know how to inspect them in other manners. They cause a rumbling sound when they start to go bad.

IT is either a bearing or a CV joint.

Spin that wheel by hand as fast as you can. If you can hear the noise coming from right behind the tire it's probably a wheel bearing.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

It is either the bearings or the cv axle. If the noise gets louder or softer when going around hard corners, it is the bearing.

MOST LIKELY CAUSE OF THIS IS THE WHEEL BEARING, DEFECTIVE CV JOINTS ONLY MAKE NOISE IN TURNS AND THAT IS A CLICKING NOISE,.

I believe the bearings in the front wheel are about to come to the end.
Have it checked in a garage.... NOW! otherwise you will be driving on 3 wheels... sooon.
Iceman.

you may have wheel bearn going. they will make noise grinding when you trun

If the sound is all the time, no matter what you are doing then it is the Transmission going bad. CV Joints, Wheel bearing will only make the noise when in rotation.. Also remember that this is a front wheel drive car, so it will throw you off thinking it is the wheel bearings or CV joints due to the front wheel drive