Model 7 Tyre Size + Wheels 20" 20x8.5 vs 20x9 vs 20x9.5

[K009]

Hey all

Been reading so much on Model Y tyre size + wheels and am getting a little confused so thought best to start my own thread.

I am wanting to put 20" tyres (aftermarket) and 20" wheels (aftermarket) on a Model Y.

1. Tesla suggest that the correct tyre size is 255/40/R20. Is this the recommended tyre size for Model Y if wanting to go 20"? Or is there a slightly bigger size better? I ask because I know on the Model 3 that for 19", 235/40/R19 is recommended, however 245/40/R19 is also possible.

2. There's not many 20x9.5 wheels out there and I know this is the recommended wheel size from Tesla. Any issues going 20x9 or 20x8.5 (I'm assuming 20x9 would be best). Or is 20x9.5 the way to go?

3. I know bolt pattern is 5/114.3. Tesla suggest offset should be between 40-45 (is that on 20x9.5 only?). If I changed to say 20x9, should the offset still be 40-45 or something else?

4. Tesla say Centre Bore (CB) is 64.1. Do the new wheels have to be CB 64.1 also?

Thanks so much!!

 

[K009]

Ok. For Question 1, I did some more reading and found out Model Y can also have 255/45/R20 tyres and they seem to fit the car perfectly with no rubbing, even with 5 people in the car. However, speedo will be out by around 2% (which isn't a lot actually)...I'd prefer speedo to be accurate so I'll stick with aftermarket 255/40/R20.

Question 2/3 - I assume 20x9 wheels will be fine? Does offset for these still need to be 40-45 or does offset change given they are no longer 20x9.5 like the factory induction wheels.

Question 4 - I have no idea. Read conflicting infomration on the internet. CB 64.1 doesn't seem to be common? Does CB then change if I go to 20x9 wheels?

 

[Neil818]

Hey so I am in the same dilemma. I plan on getting 20x9 it’s a bit lighter I imagine. Offset should be around 35 for 9in wheel and you can stick with 255/40/20. You can do +25 apparently it’s supposed to be flush with 25, maybe minor poke.

 

[Maxmir88]

Has anyone tried size 20x8.5 with 35mm offset on 2023 Model Y LR? Tire rack does not recommend it, but I see some companies sell wheels in this size specifically for Tesla Y.

 

[Neil818]

Should be fine, my buddy has 19x8.5 with a 35 offset on his Y and it’s fine. 20 just bigger diameter. Wider or too aggressive offset is where the problem lies. Tire rack doesn’t suggest anything but stock most of the time

 

[Maxmir88]

Should be fine, my buddy has 19x8.5 with a 35 offset on his Y and it’s fine. 20 just bigger diameter. Wider or too aggressive offset is where the problem lies. Tire rack doesn’t suggest anything but stock most of the time

Thanks for replying. Any concerns (perhaps around the breaks) with pairing 20x8.5 (+35) with all season tires - 255x45 (instead of 40)?

 

[Neil818]

There shouldn’t be especially with 20’s. Putting a 45 will cause your speedo to be off. You may want to check a tire size calc. Should probably stick to 19s if going with a 45.