Has anyone modified their tire size from 21" to 19" or vice versa? I'm trying to switch from 21" to 19" but DA says its too late, but they can sell me a 19" tire package. Seems like if they can sell me an extra set of wheels/tires, they should be able to make that modification. Curious to see if anyone's run across this.
Modifying tire size
- Thread starter chcho
- Start date
- Joined
- Nov 19, 2021
- Messages
- 7,028
- Location
- Cupertino, CA
- Cars
- Air DE-P, ZR, 21"
- DE Number
- 241
- Referral Code
- Q1BTN5Y3
The extra set is considered an accessory, which is why they can do that. When they register the car VINs with the various regulatory authorities, they do so with the specific wheels on the configuration; it's also listed on the Monroney Label, for example. Because of that, switching wheels is more complicated, and I understand why they don't do it.
That said, I have both sets (originally with the 21s, 19s as an accessory) and have mobile service swap my 21s for the 19s before long road trips, and it works great.
Does service have to update any calibrations when the size is changed? I'm eyeing some aftermarket 20" rims and tires that will be a little different net diameter.
- Joined
- Nov 19, 2021
- Messages
- 7,028
- Location
- Cupertino, CA
- Cars
- Air DE-P, ZR, 21"
- DE Number
- 241
- Referral Code
- Q1BTN5Y3
Yup. They need to adjust the TPMS sensors. But they can do that via mobile service.
- Joined
- Dec 25, 2021
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- 474
- Location
- Atlanta, GA
- Cars
- Lucid Air Grand Touring
- Referral Code
- 83YOVHQD
Does anything else need to change if you change tire/wheel sizes? The sticker on the drivers door column is written for the original tire/wheel size.
Any software settings need to change ?
Any software settings need to change ?
- Joined
- Aug 23, 2020
- Messages
- 3,009
- Location
- Paradise Valley, AZ
- Cars
- Lucid GT
- Referral Code
- K9WIJHB0
TPMS limits and range calculations have to be updated.
