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20" Induction tire replacement with Michelin Pilot AS4 275 /35 R20

Bulls23

New Member
Aug 28, 2021
1
0
Richmond, VA
I need to replace my tires on the induction wheels (got 17k miles out of the stock tires). I ordered the Pilot Sport AS4 in the stock 255 /40 R20 size from Discount Tire. Apparently they are on national backorder with no timeline of when they will be available so they said the 275 /35 R20 would work fine and be a little wider which may protect the rims better. He also said it would only affect the speedometer reading by 1mph at 65mph. I am a little skeptical to change the size so wanted to know what you all think and if you have any suggestions.
 

patnshan

Member
Oct 7, 2020
218
181
Milwaukee, WI USA
265/40 will fit for sure (I checked with Tesla SA), but I am unsure of 275. Also, 35's have less rubber than 40's so it might be rougher in terms of ride.
I was thinking about going with 275/40/20 when my crappy goodyears wear out.
 

NBCGLX

Member
Jul 3, 2021
27
16
Philadelphia, PA
A 275/35-20 tire has a sidewall that's about .25" smaller than a 255/40-20 tire, with the former being about .50" smaller overall in diameter than the latter. This will exacerbate the optimistic Tesla speedometer, which reads about 1 MPH slow on the highway on the factory tire size, as measured by GPS. So basically, when your speedometer says 65 MPH, your actually speed will be closer to 63 MPH. My advice would be to go to a 265/40-20 tire size, which is about .30" larger in overall diameter than the factory 255/40-20 tire size. This will give you a bit more width, a bit more sidewall, and just about fix the optimistic speedometer (many cars have optimistic speedometers). And the best part is, according to TireRack, the Michelin PS A/S4's are in stock in 265/40-20 size :)
 

AFGolf96

Member
Sep 5, 2021
7
8
Virginia
If you're going with 20", I recommend the 275/40/20. I just did this with my MYP, and am very, very happy with the result.


20210904_153934.jpg
 

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AFGolf96

Member
Sep 5, 2021
7
8
Virginia
Thank you.
20x9.5 Martian
Satin Gunmetal
I prefer the handling with these wheels and tires... Definitely not too soft, and I prefer the cornering on these better than the stock.
 

capn00

Member
Jan 31, 2018
55
23
Yardley, PA
Thank you.
20x9.5 Martian
Satin Gunmetal
I prefer the handling with these wheels and tires... Definitely not too soft, and I prefer the cornering on these better than the stock.
What is the offset on your Martian? I am very close to ordering 275/40's for our new MYLR with Inductions, but I still haven't seen them verified to work with the stock wheel offset. My only concern is clearance on the knuckle. It *looks* like it should fit fine, but even measuring it will not make up for mounting and trying...

1632396329223.png
 

AFGolf96

Member
Sep 5, 2021
7
8
Virginia
What is the offset on your Martian? I am very close to ordering 275/40's for our new MYLR with Inductions, but I still haven't seen them verified to work with the stock wheel offset. My only concern is clearance on the knuckle. It *looks* like it should fit fine, but even measuring it will not make up for mounting and trying...
Offset is +45

No rubbing with these.

 
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capn00

Member
Jan 31, 2018
55
23
Yardley, PA
Offset is +45

No rubbing with these.

Perfect, thank you.
 
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