[AHjelm]

Hi there.

I have a question regarding winter tires here in the north (live in Iceland). Would it be OK for me to put 245/45R20 on the original wheels undir my GTX id.4. It would be better for me to have the tires all the same size in order to be able to roate them between years. Is this size ok having the width of the front and rear rims in mind (currently with 235 tires in the front and 255 in the back).

The reason me asking as well is that I have found a set of barely used 245/45R20 Micheline tires that I can have for 1/3 price of new ones. 😊

All the best,
Adalsteinn

 

[VW TECHNICIAN]

For as long revolution per mile is the same you can go with 18" wheels and gat tires that will have same revolution per mile as stock tires.
And you can go same size all around....
Check data sheet on tires you buying against the stock tires. ...revolution per mile should match. ...

 

[Stinsy]

Just check the load rating of those tires you’re thinking about…

 

[AHjelm]

Just check the load rating of those tires you’re thinking about…

They are XL.

 

[AHjelm]

My main concern is the height difference in the front tires between the original 235/55R20 and the one I a looking at now, the 245/45R20.
The height difference is 1.2 inches.

 

[Stinsy]

Load rating of those tires is 103 (which is fine). The size difference is fine…

 

[AHjelm]

CORRECTION: The original front tyres are 235/50R20 not 235/55R20 as I thought.

The difference is therefore even more subtle,0.6 inches. 😊

 

[Huey52]

Should be fine, including the adequate tire load rating for the heavy ID.4 AWD.
Your speedometer will only be slightly off.
Note that the AWD variant has a bit higher ride height and therefore more wheel well capacity so again that bit taller aspect ratio tire is no issue.

CORRECTION: The original front tyres are 235/50R20 not 235/55R20 as I thought.

The difference is therefore even more subtle,0.6 inches. 😊

View attachment 5848
View attachment 5849

 

[Don]

Usually . . . . there is a ratio between the circumference of the front tires and the circumference of the rear tires which must be maintained. The car counts the revolutions of the wheels and various systems use that info to maintain the proper operation for the ABS, traction control and regenerative braking

Before you buy any tires, I would suggest that you check the overall circumference of your OEM front tires and your rears and if they're not the same, compute the difference and try to maintain that same exact difference as closely as you can in any new set you buy

I know for sure on my current Mitsubishi EV, which is not 1/10th as sophisticated as an ID.4, if you don't maintain the same ratio front to rear, regenerative braking is disabled, as the car thinks the rear wheels have lost traction

Don

 

[crabnebula]

You might want to take a look at this thread.

Staggered Tire Sizes front/rear

There is no problem with going same size all around....reason for rear tires being more wide. It is for handling and less tire wear vs front....and also to make better traction when full torque is applied from electric motor. If spirited driving is not something you are after you will be good...

www.vwidtalk.com

In short, different OEM configurations of the ID.4 have slightly different front to rear tire diameter ratios, and some do have square setups.

I think using 4 245/50 R20s would work. Your speed and odometer will be very slightly off, but there seems to be a consensus that the difference with stock is too small to throw off control systems. I actually wrote to VW to ask if it could cause any issues but they didn't reply yet.

 

[Don]

It might 'work' on some cars without throwing any of the electronics off, but the engineers who designed the car chose a smaller footprint for the front tires for some reason and I would suspect that has something to do with the handling of the car - Could you picture a 930 turbo Carrera with the same size front and rear?? It must have been a pretty compelling reason of they would certainly have preferred to stick with the same size all around which would enable owners to rotate their tires for more even wear. Until I knew what they were thinking, I would tend to respect that decision and stay with the OEM sizes. But, once you've bought it, it's your car to do with as you wish whether it's a good idea or not

Don

 

[Don]

It could be that since the car is RWD, they took great pains to make the front wheels steer to the left or right as sharply as possible, so as to give it that incredible turning circle that it has and that meant there wasn't enough room up front for a tire as wide as the ones they chose for the rears. Going wider up front might cause some rubbing somewhere at full lock

Don

 

[7S POWER]

CORRECTION: The original front tyres are 235/50R20 not 235/55R20 as I thought.

The difference is therefore even more subtle,0.6 inches. 😊

I see what you want to do. You want to make 45 Series tires all around. Be warned there'll be an increase in the overall Cd, heavier & slower steering response, tramlining, increase aquaplaning in the wet, increase rolling resistance, heavier tires decrease range, the new size front tires will wear out faster etc.

7S POWER