03-02-2021, 10:18 PM | #1 |
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Trying to choose tires for new order
We ordered a xdrive45e in Midnight Sapphire with Tartufo leather interior. Chose the 20" 740M with our M Sport package, dealer was pushing this. But the more I look at the 21" on the build I like the look. I'm the more sporty driver, my gf is more conservative. I've had lower profile tires in the past and know it will make for more agile and 'hard' drive experience. Dealer said significantly more tire wear on the 21".
Wondering if the air suspension on the 45e would allow us to mitigate the harshness of the lower profile tires? Anyone have any experience? We already pushed the price up with Individual color and Merino leather so not sure I want to add another 950 for the 21' wheels!? Any feedback appreciated. |
03-02-2021, 10:47 PM | #2 | |
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Haven't read complaints of owners with air suspension with 21" / 22" wheel upgrades. Many praise and recommend the combo. 21" (run-flats) / 22" (non run-flats) wheels options are equipped with high performance summer and highly limit your tire options when it comes to replacing - expected tread wear ranges from 10 to 16K miles (depending on road conditions, tire pressure, driving style) If you reside in a snow region, you should factor the additional cost of having a set of snow tires or snow / winter wheel set and storing them.
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03-02-2021, 11:36 PM | #3 |
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Stick with the 20's. In addition to the aforementioned drawbacks, the 21's are also staggered which means you can not rotate them. Depending on how you drive, tread life can be as short as 10k miles.
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03-03-2021, 01:38 AM | #4 | |
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03-03-2021, 04:16 AM | #5 |
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The tire options on both the 21's and 22's are incredibly limited, there are no all season options for the 21's so if you have any real weather where you live you'll need to get a dedicated winter setup or swap tires each season. If I had to do it over again I think I would have gone with the standard 20" wheel.
BTW I have the air suspension and the ride is fine with the 21's |
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03-03-2021, 04:18 AM | #6 | ||
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03-03-2021, 05:49 AM | #7 | |
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Additionally, 22" aren't offered on a 45e build likely due to load rating concerns because of the heavier high voltage battery above the rear axle, which is in line with removing the 22" option for all variants when adding 3rd-row seating. demet123 congrats on your order! while the ride quality was excellent because of the air suspension on the 45e (my kids also noticed the improvement over my previous Q7 w/air suspension + 21" wheels), I converted from OEM 21" staggered to a 20" square setup just a couple weeks after taking delivery. the 21" were summer performance RFTs, and temps were below 40°F. I didn't like the limited staggered all-season 21" RFT offerings, and i don't have the space to store a separate set of winter wheels/tires. a couple days after the install, we got hit with our first snow/ice storm. Lucky me! one guy posted the resulting accident when he drove through a few inches of unexpected snow on his new G05 that still had summer performance tires. not so lucky! while 21" look great, I believe 20" is a very good balance of looks and their aforementioned advantages. Last edited by nZtiZia; 03-03-2021 at 06:06 AM.. |
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03-03-2021, 08:21 AM | #8 | |
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03-03-2021, 08:29 AM | #9 | |
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Not sure BMWs rationale with not offering the 22s with the 45e or 3rd row, but load ratings on the 22s is still "XL", same as on the 21s.
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03-03-2021, 08:32 AM | #10 | |
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because of 3rd row seating or the 45e's high voltage battery, the all-up weight limits or carrying capacity are too close to the 22" tires' max load rating Last edited by nZtiZia; 03-03-2021 at 12:59 PM.. |
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03-03-2021, 08:34 AM | #11 | |
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03-03-2021, 01:01 PM | #12 |
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22" tire load rating is less than 20/21" tires: 22" are rated for 104 front and 107 rear 21" are rated for 107 front and 110 rear 20" are rated for 110 front and 112 rear (staggered), 110 front/rear (square) demet123 i wouldn't recommend going 22" at all on the 45e. BMW removes this option from the build for a reason. another way to look at it for staying with 20" RFTs is that it gives peace of mind if your partner gets a flat while driving, more than likely they can continue to drive to safety versus pulling over. i mean, they can do this with 21" RFTs as well but you'll be the one dealing with its staggered disadvantages come repair/replacement time. Last edited by nZtiZia; 03-03-2021 at 01:10 PM.. |
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03-03-2021, 02:53 PM | #13 |
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OK thanks so much guys for all the info and feedback. Will stick with the 20", maybe if I cared a bit more about the look I might be willing to fight the fight but I don't. Been there done that on my Mercedes 560SEC, which I regret selling!
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03-03-2021, 03:54 PM | #14 | |
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I know many people are onboard with the 20s, but don't get lulled into a false sense of security (as you state "more than likely", that's not a 100% guarantee) with run-flat tires. They can be a tremendous help with a flat and provide safety and reassurance, but there are also drawbacks to run flat tires and I prefer to always have a spare. Most on the forum probably know or think of these things, but the average consumer buying any car with run flats probably hasn't given it a thought. Run-flats in general: Have a limited driving distance, 50miles at 50mph Can have rougher rides do to stiff side walls Reduced fuel economy because in general run flats are heavier/thicker Be more expensive to replace, compared to non-RFTs Can't always be repaired Can leave a driver to stranded in case of side-wall failure or blow-out (since you won't have a spare) Can leave you stranded in case of severe tire damage, i.e. shredded tire I don't like the last 2 points as someone who's not afraid to change a tire or depend on AAA; caveat, I do a lot of highway driving for work. Not eliminating run-flats as an option, but don't assume there are no drawbacks. In general driving around in the city or near home you are fine, but do you want to be stuck on a highway in an unfamiliar location at 11pm with no spare when you have a run flat failure. I recognize a spare is not an option in the 45e, but I do like the security of it even if I never use it.
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03-03-2021, 04:05 PM | #15 |
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Easiest solve is for BMW to offer A/S OEM as an option for +1 sizes. I agree that +1 and +2 look great but BMW needs to stop assuming that owners who want +1 or +2 sizing want high performance tires. For those who lease, investing in additional winter tires and storage is absurd.
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03-03-2021, 05:18 PM | #16 | |
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03-03-2021, 05:44 PM | #17 |
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you make all very good and valid points. I stressed RFTs to the OP and anyone with the 45e because there is no security in a spare that doesn't exist. the security is in its construction and design at the cost of comfort, cost, etc. another option would be to go with non-RFTs and carry a tire repair or fix-a-flat kit on board.
Last edited by nZtiZia; 03-03-2021 at 06:41 PM.. |
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03-03-2021, 05:53 PM | #18 |
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First, fix a flat doesn’t always work, and second, it will probably require also replacing the TPMS, which adds to the overall cost, not counting the cost to clean up the rim inside.
What may be a better tool is a stick in plug as a temporary fix...then, get a proper plug installed from the inside when you can. That also requires you carry an air compressor. |
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03-03-2021, 06:39 PM | #19 |
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i'm not advocating a fix-a-flat kit by any means, but it is an option for 45e owners who can't store a space saver spare if using non-RFTs.
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