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BMW Z4 Tires and Wheels

49 messages,  Last post on Jul 12, 2008 at 9:25 AM

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What is this discussion about? BMW Z4, Coupe, Convertible

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#40 of 49 Z4 M stock tires by maril556 Feb 19, 2008 (7:43 pm)
Can somebody tell me what are the stock tires on Z4 M Roadster? Are they summer or all-season?
#41 of 49 Re: BMW Z4: Tires/Wheels by markwell Feb 27, 2008 (11:21 am)
Replying to: claires (Oct 19, 2006 10:42 pm) I was the fortunate second owner of the most pristinely new, babied 2004 BMW Z4 2.5i convertible. After 2.5 years with the first owner, it was only driven 11,400 miles. It was kept in a garage at home and at work. Distance to work? 5 miles. The car seldom saw speeds above 40 miles an hour. It got garaged for the winter months. It seldom saw a drop of rain.   Ah, the tires. Standard Potenza's High Performance ZR Run Flat Tires (RFT) with little to no wear. I have been driving the car between north of Baltimore to south of Washington DC at a 2000 mile a month pace. I picked up the car Oct 06 and dry docked it for Dec, Jan, Feb. Tire wear for highway miles was negligible. It rain straight and true as the most perfect balance of roadster and performance tire I have ever experienced. That was my first 10,000 miles.   Around 22,000 miles, i picked up a small steel filament puncture in both driver side tires (months apart - Spring of 2007 and late Summer 2007) and both near the inner side wall on the bottom tread. Finding a place to plug a RFT is next to impossible. They want to sell you that $200 and up replacement tire in the worst way. "We were going to fix it for you, but ooops, its near the part of the tread near the side wall. Sorry - we won't touch it." So I squirted a couple of cans of fix flat goo into each tire and got easily another 10,000 miles out of these tires. I heard so many neigh sayers, "It will make the tires run unbalanced" or "It will ruin the tire." Poppiecock and bulltwinkies - if I couldn't use the fix flat goo, the tires were shot anyway. They are riding fine and holding tire pressure no problem. What's more, they are wearing evenly!   Where I think I goofed was I didn't dry dock the car again for the winter months (2007 to 2008). I drove it all of December 08 and January 08 as they were abnormally Northeast mild but a specially snow and ice free. What I experienced could only be compared to the exorcist on mornings below freezing. The summer RFT's take a set while the car is parked over night. The first 10-15 minutes are a challenge of every fiber in ones' body. At speeds under 25-30 mph, there is a subtle wub-wub. At speeds of 40 mph and up, the steering wheel begins shaking violently and doesn't stop until the tires have warmed.   As it turns out, I had to bring the car in for only its second service, an oil change early Feb 2008. Low and behold, with nearly 32,000 miles on the tires, they are beginning to get close to the wear indicator marks for the rear tires. A few wet cool morns, accellerating into traffic, the back was breaking free a bit with ever increasing frequency. I think if I baby the car, don't jump on it ever and only drive it when temps are over 40 degrees F, I may get another 5,000 miles out of them. The most beautiful thing is the wear has been totally even with no inside or outside wear deltas. If someone has wear only on the insides, it sounds like a definite toe, balance. alignment, or driving consistently at excess speeds on consistenly windy roads issue. I've dry docked the car now and won't drive it until late March.   Because of the "unrepairable" punctures, instead of just replacing the rear tires, I'm thinking of getting an entire new set of 4. Problem is, even with internet tire purchase, the Factory OEM as everyone knows are freaking expensive. I'm willing to try Non-RFT, but haven't heard anything good about them on the Z4. I've hear that GoodYear are a solid replacement, but don't wear as well.   I would even consider going with something less than ZR rated because I seldom even drive over 80 mph. I like the idea of All Season High Performance because odds are I will not have the luxury of dry docking her in future winters (my son gets his license and will take my non-Z4 set of keys).   Does anyone have any recommendations on off brand RFT or non-RFT replacements they have had good luck with?
#42 of 49 BMW Z4 WHEELS QUESTION by roymontemayor Mar 26, 2008 (12:08 pm)
i've got a set of 4 wheels for that i wanted to sell. they are authentic BMW alloy wheels 16x7 10-spoke wheels. 5 bolt, great condition. they've been driven on for about 29,000 miles.   they come with a set of bridgestone potenza runflat tires RE050. the tires are in driveable condition. the two on the rear are low on tread, but the tires that were on the front are in good condition. tires have been driven on for 29,000 miles.   i was wondering, what is a good price for me to sell these wheels at? is $1250 (tires included) a decent price? Replies to this message: fedlawman (Mar 27, 2008 5:39 am)
#43 of 49 Re: BMW Z4 WHEELS QUESTION [roymontemayor] by fedlawman Mar 27, 2008 (5:39 am)
Replying to: roymontemayor (Mar 26, 2008 12:08 pm) Check e-bay and see what they are selling for.
#44 of 49 Michelin Pilots by smilingphases May 17, 2008 (7:22 pm)
I just bought a lovely Z4 and it came with 4 Michelin Pilots. The tires are awesome, after 2,660 mile trip no noticeable wear. Heavy rain and no hydroplaning! I treat this car like a motorcycle, so when winter hits, it is parked. Besides where I live, we get winter 8 months of the year and they don't even plow the streets so this poor toy car would be instantly high centered!
#45 of 49 2007 Z4 3.0si by bevscar Jun 18, 2008 (11:27 am)
first bmw. tire light was on at dealer. they fixed. 5 days later light on again. bought used 9,000 miles. 225/35 R18 90W on back and 225/40 R19 88 on front. Bridgestones. know nothing about tires and why light keeps coming on........ Help please Replies to this message: markwell (Jun 18, 2008 7:11 pm)
#46 of 49 Re: 2007 Z4 3.0si [bevscar] by markwell Jun 18, 2008 (7:11 pm)
Replying to: bevscar (Jun 18, 2008 11:27 am) Hmm, The factory equip tires are definitely the finest for grip and are great if the garage is where you want to keep your car. Personally, I drive the puppy 11 out of 12 months a year and love it. I lost maybe 5% grippiness by going with the Yokohoma equivalents, but I have to tell you, the grip better when wet, drive in all temps, last 50,000 miles instead of 20,000 and give a smoother ride. I've never been happier.   As for the low tire pressure light. It means you have a slow leak in one tire. You need to check the tire pressure regularly to determine which tire is you culprit. Get the leak repaired. If its too slow or near the side wall for them to fix, use a can a flat fix, maybe two, follow the directions on the can. I got an extra 10K after the first 20K by employing that technique. (another reason why I went with non RFT's for my first replacement set. Non-RFT's are easier to repair and about 33-50% cheaper for the same performance specs. I've heard both sides as far as whether RFT's pick up small leaks quicker. I think the tires wear quicker and closing on 20K miles, you find small leaks crop up frequently. Don't toss your tires so quickly though, sometimes the "slow leak" can come from a dirty/faulty staitor value. Good Luck
#47 of 49 bevscar by bevscar Jul 02, 2008 (1:12 pm)
thank you also is it worth it to buy tire insurance???? Replies to this message: markwell (Jul 07, 2008 6:36 am)
#48 of 49 Re: bevscar [bevscar] by markwell Jul 07, 2008 (6:36 am)
Replying to: bevscar (Jul 02, 2008 1:12 pm) For the run-flats, I think its definitely worth it if you do any kind of hard cornering. The tires are prone to pick up any small debris puncture especially if you don't like slowing down for the twisties. They hold the road like no bodies business, but the also are magnets for any kind of puncture material.   For non-run flats, probably not worth it. You shouldn't be pressing the limits as much, the tires are a lot cheaper to replace and repair. They shouldn't pick up the small leaks as quickly. Generally speaking, I always lose the damn insurance receipt for the tire repair/replacement and while I have purchased it several times in the past, only once have I cashed in on it and it was for repair only. So for me, it has never been worth it.   Incidentally, I have 7K on the Yokohama's and am in heaven. I did lose a hair off dry cornering hold, but made up for that in spades in wet and cold adhesion. I'm extremely happy with them (so far).
#49 of 49 Yokohama tires by jamie15 Jul 12, 2008 (9:25 am)
I know about as much aobut tires as Bev. Can you give more specs as to the Yokohoma tire and where I find them?

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