-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
40 vs 45 Sidewalls
I plugged in the numbers in the calculator above. You'll notice there is 1" difference in height between a 40 & 45 sidewall. Wondering if you could just tell the vehicle that you have 21" Uberturbine wheels to compensate. Hoping this would make the speedometer more accurate.
I plugged in the numbers in the calculator above. You'll notice there is 1" difference in height between a 40 & 45 sidewall. Wondering if you could just tell the vehicle that you have 21" Uberturbine wheels to compensate. Hoping this would make the speedometer more accurate.
im sure the 21's have less sidewall equal diameter
my question is has anyone put 245's on a 9.5" rim? besides setting yourself up for curb rash does it work?
Got the Quatrac Pros (255/45r20) installed today thru Tire Rack mobile installer. Took a quick drive and immediately noticed the extra sidewall has softened up the ride. Tires were installed at 41 psi.
ABRP has my "speed overreporting factor" at 3.0%. Believe they run a gps vs car data for comparison. So assuming the change in speedometer will be negligible.
ABRP has my "speed overreporting factor" at 3.0%. Believe they run a gps vs car data for comparison. So assuming the change in speedometer will be negligible.
Attachments
That is great news! I ordered the exact tires and size today from TireRack and will have them installed next Thursday. Here’s to less curb rash and softer ride!
Bumps in the road are much less jarring. They are inflated to the same 42 PSI recommended on the door jamb.
I've had them on my car for 900 miles now. I love them! The ride is much softer. My coffee doesn't spill when I go over railroad tracks like it used to every time. The speedo is slightly low. It's about 1 MPH off at 60 MPH on the highway. So, 60 MPH on the speedo is 61 MPH according to the GPS on my phone. I can adjust for that, no big deal.
i am looking at these sizes too. can you post full side profile shot please? thanks
MatildaModelY
Active Member
MatildaModelY
Active Member
There are som photos above! I think the tires look great. I will be posting pictures when I get my tires put on this week.
Attachments
Ahh- assumed you wanted to see if there was any offset. Same diameter so no noticeable change. Had to mess with the side shot to get the tires to show with the lighting.Thanks... what i meant though was full side view shotlooks good! thanks!
Haven’t experienced any rubbing at full turn/lock.
Consumption comparison between Goodyears and 255/45/20 Vredesteins. City driving with temps 30-60 range.
Attachments
MatildaModelY
Active Member
Does anyone know if the 255/45R20's might rub with a Model Y Performance since the MYP is a little lower than the LR?
They shouldn't; the MYP OE (front) size 255/35R-21 have a 28" outer diameter. The MYP OE (rear) size 275/35R-21 have a 28.6" outer diameter. The 255/45R-20 have a 29 inch outer diameter. The OE front and the 255/45R-20 have the same 10" width. The OE rear have a 10.8" width.
Tire Size Comparison
MatildaModelY
Active Member
So a 1" difference in the front height wise. I imagine only going over pretty harsh bumps would cause any rubbing then. Thanks!
Similar threads
- Question