01-11-2020, 06:42 PM | #1 |
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Tires
My tires are near their limits on my 540i. It has 19 in wheels. I have the original factory Continental 245/40R19 98H M+S Pro contact GX. Run flats. I am satisfied with the ride, lack of noise and handling of this tire. The wear is not so good (25,000 miLes). Was kinda thinking of getting non run flat tires. Cannot decide between getting a 12 volt air compressor kit or a spare tire kit with a jack. Anyone else gone non run flat?
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01-12-2020, 04:39 AM | #2 |
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I have run flats but I also opted for the factory spare tire kit. And I added the pump that plugs into the cig lighter. I’ve wrecked some run flats previously. It’s a well done kit but I raises the floor of the trunk quite a Bit.
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01-12-2020, 11:39 AM | #3 |
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Where do you get the run-flat kit? How much does it cost? Is it in a bag or something? I have not had any problems with potholes where I live. No flats either. I may just go with the air pump. Car is so quiet I really don't want to mess that up with a spare tire and jack banging around in the trunk.
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01-12-2020, 12:24 PM | #4 |
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For anyone thinking about getting a portable tire pump to put in their trunk. Here is a video of a guy testing out a lot of different ones. I think I will get the Harbor freight one.
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01-12-2020, 12:34 PM | #5 | |
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https://www.shopbmwusa.com/Product/342/BMW-MOBILITY-KIT Regarding run flat vs. Go flat. In most cases a go flat tire will have a better ride and offer better handling/performance. Looks like the Conti tire on your car is a grand touring tire, not a performance tire. It also has a treadwear rating of 500. I doubt you're going to find much better longevity than the Conti and still offer good handling/performance. Yes, I'm aware treadwear ratings are subjective to each manufacturer who uses their own methodology to come up with the wear rating. Nevertheless I'm not seeing another tire other than the Conti DWS6 that might be a good go flat option with long treadwear. But looking at the tread design of the DWS6, my guess is that tire may be noisy as it ages. If you want a tire upgrade where performance and handling were top priority, look no further than the Michelin Pilot Sport 4s. Go flat tires are a good choice for people who don't mind getting their hands dirty and getting stuck on the side of the road. If you drive in rural areas where help isn't readily accessible, I'd say stick with run flat. I know 2 drivers who switched to go flat then got flats in the rain and said never again. To each his own!
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01-12-2020, 12:44 PM | #6 |
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In this video the reviewer is testing all junk. Sure maybe harbor freight is the best of the junk. If you want a good pump that will run off a cigarette lighter check out the Viair 85P. ~$50 Amazon sells it.
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01-12-2020, 07:50 PM | #7 |
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Claykin's advice is very sage. I had go flats on my Porsche, my M4, and all of my motorcycles, and rode/drove all over the country with only a pump and a Dynaplug kit to patch holes, which I never had to use. However, I was lucky enough to never have a catastrophic failure, or a puncture which leaked air very fast. I have chosen, on my M550, to continue with runflats, since I did blow out two sidewalls on the 20 inch wheels in my less than two years of ownership (Goodyear F1 Asymmetric tires, which are crap). I have switched to Michelin PS3ZP runflats, which I like very much. Expensive, and hard to find, though. It's definitely a delimma we all face. Lots of threads about it if you search the tire forum.
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01-12-2020, 08:11 PM | #8 | |
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01-13-2020, 09:23 AM | #9 | |
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01-13-2020, 09:34 AM | #10 |
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Are the fuzes on a 2019 BMW 540i G30 over 15 amps. Where would you find that information? It looks like a good one though.
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01-13-2020, 09:47 AM | #11 | |
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There's another lighter socket in the trunk but it's a stretch to reach the front tires from the trunk socket.
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01-13-2020, 11:41 AM | #12 |
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If the G30 is like the previous F chassis 5/6/7 series...the fuse index is usually located on a laminated sheet found near the trunk fuses. And the sheet contains the fuse #s, their amperage, and their location:
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01-13-2020, 02:31 PM | #13 | ||
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01-13-2020, 04:06 PM | #14 |
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My car also has a lighter socket in the center armrest and two lighter sockets in the back seat under the air conditioning vents. A total of 5 sockets. Wonder if they are all on the same circuit or different circuits.
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01-14-2020, 09:46 AM | #16 |
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Be careful
I just read in the owner's manual page 257 that came with my 2019 540i G-30 under heading General Information; "The total Load of all sockets must not exceed 140 watts at 12 volts." So here are some workarounds for the Viair 85P which is 180 watts at 12 volts and 15 amps. Yea I know I am really nit-picking but you heat up a wire in a wire bundle and get a short it could get messy and expensive.
https://www.amazon.com/dp/B074WT6LP2...v_ov_lig_dp_it https://www.amazon.com/VIAIR-85P-Por...9015949&sr=8-2 |
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01-14-2020, 10:22 AM | #17 |
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Since the OP has already made up his mind, I'll just add that "Slime" makes a kit with the fix-a-flat stuff and a compressor, neither of which I've had to use yet but reviews are good on the brand. I also have a dynaplug kit, which I have used once with not great results, but it's better than nothing (it was a big hole and required three plugs).
I really only get worried on long trips, where I may be severely inconvenienced if I have to have a tire replaced, since you're unlikely to find our size(s) instock at any local store. But every nail/screw/piece of trash that I've had in a tire has resulted in slow leaks, so a decent compressor should get you through your trip. I hate runflats. I love the technology, I think it's great for some people, but I always remove them from my cars.
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