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2010 2011 BMW 5 Series Forum F10 Swapping tires to a slightly wider non-runflat |
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05-05-2014, 06:40 PM | #1 |
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Swapping tires to a slightly wider non-runflat
Hi all,
I live in the NYC metro area with an F10 running the OEM 245/40ZR19 front tires. Unfortunately, my car seems to be really attracted to potholes, and I have continuously developed bubbles on my front tires. I just replaced them a month ago, and I got new bubbles already. These replacement runs me about $500 per tire. I'm thinking about switching these tires to a slightly wider, not as low profile 245/45ZR19 regular tires which I guess would not be as prone to potholes. Anything that I should look out for? Thanks! |
05-05-2014, 06:54 PM | #2 |
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The tires will be around 3.6% taller, or around an inch, which may cause clearance problems. And, your speedometer and odometer will be off by that same amount (you'll be going faster than you realize, but won't be logging as many miles, so your on-board service timers will be off as well). Plus, that will raise the gearing by about that same amount, resulting in maybe better cruising economy, but maybe not if it needs to downshift to maintain speed going up that grade when the stock gearing could stay in top gear. Your acceleration, baring any other changers would be slower because you're gearing is going to be taller. Will you notice 3.6%? Some will, some won't. It will cause a little more stress on initial startup to either the clutch or torque converter because of the taller gearing.
So, is it worth it? Your choice. |
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05-05-2014, 08:15 PM | #3 |
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Just ditch the runflats and get tires that don't suck. I just put on some Conti DW summer tires in 245/40 and they are a dramatic improvement. Waaaay stickier, softer riding, much lighter and only $200 per tire. I've been running lower profile tires for years and haven't had a bubble or a flat in about a decade. It's the runflats, not the profile of the tire.
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05-06-2014, 07:30 AM | #4 |
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I removed the Goodyear Eagle LS2 run flats after similar issues. Replaced those with Michelin Pilot Sport AS3 (I needed an all-season tire). I have good experience after 10k miles.
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05-06-2014, 10:49 AM | #5 |
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05-06-2014, 01:59 PM | #6 | |
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Quote:
RFTs are the devil! They can help you out in a pinch, but honestly they can be more trouble than they're worth sometimes.
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05-06-2014, 05:25 PM | #7 |
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Yeah I never really got the point. You still need to take it to a shop to get it patched up if you get a flat. May as well have better handling at half the cost.
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