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Given the low life expectancy and high cost of the tires on the EQS SUV I am planning to downsize to 20" wheels. Prices for the 20" tires are roughly 50% of the cost of 21" tires. The 29R wheels for the EQS SUV have a "Delayed Availability" status on MBUSA.com. I noticed that TireRack does not list any 20" 265/50 R20 tires with an MO and EV tuned rating. So I am wondering if it's the wheels or the tires that are delayed. I believe the part number for the 29R wheels is either A29640104007X45 or A29640104007X23 depending upon whether the wheel spokes are painted silver or clear coated machined aluminum.
I did find a reasonably priced source for EQS SUV TPMS sensors.
I think the MB A293-401-06-00-7X23 rear wheel available for the EQC SUV may work with the EQS SUV. The rear wheel dimensions are 8.5J x 20 ET 30 which is only a 0.5mm difference than the EQS SUV 20" wheel ET. The difference between the curb weights for the EQC and EQS SUVs is only about 600 to 700 pounds so I am comfortable using the EQC wheels on the EQS SUV.
I would suggest just buy tpms from mb or local shop. the taycan tpms I bought from Ebay, its battery only less for 6 mo. so not worth it.
I agree completely that you should not order off-brand sensors. However, I plan to order the TPMS sensors from the eBay auction I linked to above since I believe they are genuine MB sensors.
I decided against getting the EQC wheels when some X296 specific 20" wheels became available. I ordered a set of four wheels from Alloy Wheels Direct in the UK.
Using the X296 wheels will obviate the need to purchase another set of shorter lug bolts for the EQC wheels. I think the Vanadium Silver wheels will look good with red calipers, which is one of my next projects.
I am thinking about getting a good aftermarket wheel too but worry about not aero enough will end up as same range as 21.
I am nearing the end of a 30-day 6000+ mile trip. Mileage has varied between 1.6 and 3.0 MPkWh. These numbers are sustained averages over 80 miles or more. I doubt if the aero characteristics of the wheels have a noticeable impact on range. From my experience on this trip the factors that influence range the most are temperature, speed, and change in grade. One morning starting in Cedar City, UT with nearly 100% SoC and 19 degrees F, the estimated range was about 200 miles, which is well below the 285 mile EPA estimate. We drove downhill a few thousand feet for 56 miles and when we stopped at Zion NP, estimated range had only dropped by 20 miles.
Thanks for sharing the interesting calculator, FGWINN!
Looking at the calculator, it made me wonder about speedometer error a bit.
The EQE SUV 500 I ordered has 20" wheels as standard. I downgraded them to 19" and my order confirmation from MB reflects this.
Do you (or anybody reading) think that MB will make a configuration tweak somewhere so the speedometer accurately reflects speed of the 500 with 19" wheels?
Thanks for sharing the interesting calculator, FGWINN!
Looking at the calculator, it made me wonder about speedometer error a bit.
The EQE SUV 500 I ordered has 20" wheels as standard. I downgraded them to 19" and my order confirmation from MB reflects this.
Do you (or anybody reading) think that MB will make a configuration tweak somewhere so the speedometer accurately reflects speed of the 500 with 19" wheels?
The 265/50 R20 tires I plan to install on my EQS SUV will cause about a 1% speedometer error. After I install them I will ask the dealer if they can change the tire specification. In the Taycan there is a setting to select the tires size and tire type (Summer, A/S, Winter) for all of the tire sizes offered by Porsche. I could not find a similar configuration screen in the MB.
I have to believe that MB will deliver your EQE SUV configured to use the tire size installed at the factory.
The 265/50 R20 tires I plan to install on my EQS SUV will cause about a 1% speedometer error. After I install them I will ask the dealer if they can change the tire specification. In the Taycan there is a setting to select the tires size and tire type (Summer, A/S, Winter) for all of the tire sizes offered by Porsche. I could not find a similar configuration screen in the MB.
I have to believe that MB will deliver your EQE SUV configured to use the tire size installed at the factory.
Thank you. In the worst case, if there's a ~1% error, I can live with that.
Thank you. In the worst case, if there's a ~1% error, I can live with that.
The 235/55 R19 tires are only 3.6mm greater in diameter than the 255/45 R20 tires. So the speedometer error would be less than 0.5% if MB does not adjust the software. That's less than the difference between a new tire and a worn out tire.
20" EQS SUV wheels arrived today. I purchased the Vanadium silver wheels from Alloy Wheels Direct in the UK, but they were shipped via 2-Day UPS service from their warehouse in Germany. The wheels were well packaged and arrived with no damage. Once I have the tires mounted I will post more photos. There are a couple of sets of the same wheels in black on eBay. But they appear to have several nicks and scratches due to careless handling.
I am not ready to stop using the 21" wheels until the tires have reached end of life, but I decided to install one 20" wheel to check the fit. There is about 7mm to 8mm of clearance between the caliper and the wheel barrel. i am planning to paint the calipers before I change out to the 20" wheels in a few months.
Quick comment on the 29R wheels on the original posting:
This may or may not be relevant to you, but if you live in an area with snow then there is a risk of snow building up inside the 29R wheels due to the more closed aero design. This in turn will impact negatively the wheel balance. I assume this could apply to other aero / closed wheel designs as well. YMMV.
I decided to try out the 20" wheels this weekend. The 265/50R-20 PIRELLI SCORPION AS PLUS 3 XL tires I picked up from TireRack for $215 each (after rebate) are very quiet and provide a comfortable ride. One mistake I made was to have the wheel weights mounted in the barrel of the wheel where the diameter was greatest. There is only about 4mm of clearance between the wheel weights and the front calipers. The weights should probably be mounted just inside the spokes since this area is outside the path of the calipers.
The TPMS sensors I purchased on eBay for 40% less than online MB dealer websites worked as soon as I restarted the TPMS monitor in the cockpit service screen.
I changed out the nearly worn 21" tires for the new 20" tires because I did not want to get lectured to by the dealer about the one tire with 4/32" tread remaining. The SUV is going to the dealer tomorrow for the 20K mile service. I will remount the 21" tires later this week to squeeze out a few more miles from the tires before selling the 21" wheels.
The painted calipers look much better with the more conventional style non-aero wheels. After I have a few trips completed with these wheels I will report back with the mpkWh I am getting with these wheels.
Did you see an increase in range? I went up to 22" and lost about 100 miles in range
I did not notice a significant difference in mpkWh over the 400 miles I drove with the 20" tires. Currently, I have the 21" tires mounted trying to get a few more miles out of them before Winter sets in.
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