New 20" wheels

artsci · Dec 27, 2014

I installed on my car early this week a new set of M580 20" wheels from GetYourWheels. They're powder coated in Brushed Stainless, which is a cross between silver and gunmetal. Eric Molinatti from getyourwheels was an enormous help with the order and my hat's off to him.

The wheels are shod with 245/40R-20 Pirelli Cinturato P7 All Season Plus XL, which will be the basis for my experiment with sound deadening foam to line the tires. Once I get a enough baseline sound meter readings without the foam, I'll receive another set of the same tires lined with the foam from the manufacturer in Brussels.

I can use the 20" wheels year round but I will put my OEM 21" wheels on the car when the cold weather fades away in the spring.

Here are a few photos of the wheels. I think it's a more aggressive look than the turbine wheels and I'm pleased with their high quality, finish, and appearance.

Thanks Eric!

omarsultan · Dec 27, 2014

Nice wheels - so they come with stock offsets and will they take Tesla center caps?

O

artsci · Dec 27, 2014

omarsultan said:
Nice wheels - so they come with stock offsets and will they take Tesla center caps?

O

Offsets are correct but the center caps are 68mm diameter, much larger than the Tesla center caps. So as might be expected, I'm customizing the center caps with the Telsa logo.

jeffmatt · Dec 27, 2014

Great looking wheels. I have been considering the 20s as a good compromise between the 19s and 21s. I worry that the 21s will damage too easily if I hit a pothole. How was your experience dealing with GetYourWheels?

artsci · Dec 27, 2014

jeffmatt said:
Great looking wheels. I have been considering the 20s as a good compromise between the 19s and 21s. I worry that the 21s will damage too easily if I hit a pothole. How was your experience dealing with GetYourWheels?

GetYourWheels was great to deal with. Eric Molinattti stays in frequent touch about the order and shipping. The service could not be better.

bxr140 · Dec 27, 2014

Did you get weight by any chance?

sickfox · Dec 27, 2014

very nice set up!

linkster · Dec 28, 2014

artsci said:
I can use the 20" wheels year round but I will put my OEM 21" wheels on the car when the cold weather fades away in the spring.

View attachment 67205

Lighted T Man

With those ultra smart 20's, I will be very surprised if you go back to the problem-laden, heavy, low-performance factory 21's. :wink:

Todd Burch · Dec 28, 2014

I got similar wheels (M310s) from GetYourWheels in matte black. GetYourWheels and Eric were great to work with...and I have 4,500 miles on the wheels with no issues.

hbombdaddy · Dec 28, 2014

looking good

still owe you dinner

let me know when you are in town again

howard in cincinnati

mdevp · Dec 31, 2014

Love the wheels and stance! Perfection.

tomas · Jan 1, 2015

I'm starting to realize I (with no help from my retailer) made a mistake on my 20" tire spec.

I have 255/40R-20 Pirelli Cinturato P7 All Season tires that I use in winter, and plan to leave on in perpetuity once my OEM 21" Contis are worn out. I love the 20s, both in terms of look and performance.

I took little notice of this last winter... but now I have noticed that when I have my winter wheels/tires on, I get slightly fishy mileage and WH/MI numbers...

By my math, diameter for OEM 19s, 21s, my setup, and ArtSci's setup should be:

OEM 19s = 482.6mm + 2(.45x245mm) sidewalls = 482.6mm + 220.5mm = 703.1mm
OEM 21s = 533mm + 2(.35x245mm) sidewalls = 533mm + 171.5mm = 704.5mm
my 20s = 508mm + 2(.40x255mm) sidewalls = 508mm + 204mm = 712mm
ArtSci's 20s = 508mm + 2(.40x245mm) sidewalls = 508 + 196mm = 704mm

Am I doing this right? If so, this means that - because I have 255 vs 245 width - my mileage and speed are 2.2% understated; and my wh/mi is 2.2% overstated. I'm breaking my brain trying to figure out effect on rated range...

In the interest of having mileage, WH/MI, and other stats as close to correct as possible... It sure would be nice to be able to specify more specifics at TPMS reset!!

This probably also explains why I have a slight bit of rubbing in front wheel wells when I do sharp maneuver as well.

Oh well, live and learn! I guess when these wear out I'll get similar all season 245/40R20s

bxr140 · Jan 1, 2015

tomas said:
...this means that - because I have 255 vs 245 width - my mileage and speed are 1.6% understated; and my wh/mi is 1.6% overstated. I'm breaking my brain trying to figure out effect on rated range...

The additional 1.6% rolling dimension is equivalent to a gearing change for highway efficiency...so theoretically you'll get a little better range. Though, the slightly wider tires are slightly less aerodynamically efficient, so that's less range. And then there's the lower vs higher ride height debate. :wink:

In reality, you probably won't notice anything. But let us know if you do.

kennybobby · Jan 1, 2015

It's not clear how the tesla measures or calculates the vehicle speed or distance travelled. There are wheel speed sensors on each wheel in order to have Anti-skid brakes, but is that dedicated to the ABS or do they also use that for the mileage?

Your larger tires travel further per revolution so in a typical car your odo/speedometer would read low by 1.25%.

wheel	ref	width	profile	diam. inch	circum ft/rev	revs/mile	delta %
19	standard	245	45	27.68	7.25	728.6	0 (baseline)
20	Tomas	255	40	28.03	7.34	719.5	-1.25
20	Artsci	245	40	27.72	7.26	727.7	-0.13
21	standard	245	35	27.75	7.27	726.7	-0.26

How does the car know what size wheels/tires are mounted? It knows the motor speed and the gearbox ratio so it could use that to calculate a speed with an assumed wheel/tire size. And it knows the voltage and current being used in the motor so it can calculate the power. Somehow it gets to Wh/mile.

Maybe you can do calibration runs on some flat interstate using a stopwatch--measure 10 mile markers at 60 mph...

tomas · Jan 1, 2015

When you reset tpms it asks if you have 19 or 21. I've assumed FW uses that to calibrate.

MichaelJ · Mar 7, 2015

Artsci,
That looks awesome. Thinking of doing exactly the same for mine that is due in a week. Two questions:
1) Can you please give me the specifics on the rims and tires, front vs back offsets, rim sizes, tire sizes, etc.
2) I noticed you said you have the air suspension always set on low. My Tesla guy that sold me my car recommended staying with the standard suspension and that is what I ordered. I am assuming mine will sit higher than yours and I would need to have it lowered to get the look you have? I know nothing about having it lowered so any advice on where, how much, etc?
Sorry, kind of a novice here so appreciate any help and advice I can get.
Thanks!

artsci · Mar 7, 2015

Thanks Michael J. The wheels are 20x8.5 ET30 Avant Garde M580 in a bespoke stainless steels powder coat finish, available here. Yours will sit higher with the springs so you may want to check this thread regarding lowering springs. Hope this helps.

mdevp · Mar 8, 2015

Didn't you get your wheels refinished/painted artsi? Let's see some pics! :smile:

artsci · Mar 9, 2015

mdevp said:
Didn't you get your wheels refinished/painted artsi? Let's see some pics! :smile:

Yes, all but the 20" have been re-powdercoated, but they go in for work tomorrow. Two were bent and one cracked in a huge pothole and I'm having them refinished as well.

The 19" are now on the car but with all of the salt and other crap on the roads around here they're filthy and unsuitable for photos. But things are looking up weather wise and I should have some photos soon.

All of my wheel sets now have custom 3D center caps with the Tesla logo and I want those in the photos as well. The 20" wheels go back on the car next Wednesday when I have the lowering links installed, lower the car 3/4" and reset the rear alignment. So photos will be posted in about 10 days.

mdevp · Mar 13, 2015

Sry to hear that about your wheels, that's got to be painful. I'm sure they'll look great after a good powdercoat though. Can't wait to see the new caps too!

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