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08-30-2009, 03:44 AM | #23 | |
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My 325i had the same size all around, the 330i of that same model had staggered. Performance difference? Other than more power for the 330i, nothing. For the 135i, most of this understeer is due to being under-tired at the front, as there needs to be more bite. But, the tire width is too narrow. BMW didn't tune the suspension to compensate for the narrow front width. Look at the size of that front hub. Why is it so wide? Right there BMW could have had more room to add at least a 235 if not more. The rears and fronts wearing at different rates is due to not being able to rotate them. That's why the driving tires wear faster. On a RWD the rears will obviously wear quicker as they are what powers the vehicle, just as the fronts power a FWD. Notice on cars that have the same size tires, as the drive wheels start to wear, you rotate them, so that the less wear tires are now the driving tires. For me I see you get even wear and extend the useful life of all 4 tires. And, when it's time to get a new set, you get 4 new, fresh, full tread tires that will get even use as they wear away. Take the car in a staggered setup. Let's say your rears are done at 20k miles, but the fronts still have good useable tread. You now have to replace the rears. But, if you only do the rears, then you have to replace with the same kind of tire to match the fronts. Your choice is limited to that brand and type of tire. I like my tires to be replaced at the same time with the same tire. I don't go for changing just 2 tires and mixing type and brand. Look at the RFT situation. Most people seem to hate them. When the rears are worn, people are still replacing all 4 so that they can get away from the RFT's. No savings there as you're throwing away still good tires. You go with a different set, but the rears are wearing twice as fast. So, when they wear you have to get new rear tires. But, you want to try something else. Well, you have to replace all 4 again, even though the fronts may have 1/2 their tread left. This happens because you can't rotate the tires to get 100% full use of all 4. If you only replace 2 tires, then you're back in for 2 more very soon and you're back to the same situation of never having a fresh new full tread set. You're always driving on partially worn tires in front or in back. I don't like having to buy tires that often. How much benefit is this staggered thing really giving me? Not much I think. |
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08-30-2009, 03:49 AM | #24 | |
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08-30-2009, 10:41 AM | #25 |
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I don't think running a different branded tire on the rear until the fronts are done is a big deal at all provided they have like performance characteristics. With mine I'll probably wear the rears until they're nearly slicks- (I don't really drive the car in the rain anyway) and by that time the fronts will likely have a few 32s and as I'm going to non-RFTs, I would like to change all 4 together for that reason. But I'm not going the throw the fronts out if they still have 5-10k left on them. I'll buy all 4 and keep the fronts in the garage until the OEMs are done. After that I plan on having to change the rears twice as often as the fronts. The conti dw has a 340 treadwear which is pretty amazing for a max perf. tire so that should help with not having to change them quite as frequently.
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08-30-2009, 11:17 AM | #26 | |
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On my Z4, I rotated the OEM tires (non staggered 225/45WR17) once at 16,000 miles and got nearly 30,000 miles out of the set - and these were the Bridgestone 050A RFTs that all our 135i brethen love to complain about. Tom |
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08-30-2009, 02:32 PM | #27 | |
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yeah thanks....i was actually kind of planning to take a closer look also.
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08-30-2009, 02:34 PM | #28 |
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Questions:
Does the tire pressure monitoring system still work if you do not have Run Flats? Also -- what do you guys do if you DO HAVE A FLAT with one of the non-run flats? that is my concern....
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08-30-2009, 02:35 PM | #29 |
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Same question for you,
Questions: what do you do if you DO HAVE A FLAT with one of the non-run flats? that is my concern.... obviously id like to save a few bucks with traditional tires, but i don't want to be stuck with a flat Thanks.
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08-30-2009, 04:34 PM | #30 |
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The TPM senders are contained within each wheel and don't care what kind of tires are mounted. And without a spare or RFTs, do what touring motorcyclists do - carry a small 12 volt compressor and plug kit. In my 128i, they easily fit beside the battery.
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11-16-2009, 05:04 PM | #32 |
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that's all good and wonderful but come trade in time I imagine that without the little star on the sidewalls like the bridgestones have the dealer will try to say no to these tires too
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