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03-02-2014, 12:38 AM | #45 |
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On the BBS CH-R I have a different setup:
BBS CH-R in mate black 8,5x19 front and 9,5x19 rear, Michelin Pilot Super Sport 225/35 and 255/30. This setup would also fit the 19" OEM tires. |
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03-04-2014, 01:23 PM | #47 |
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My conclusion is that on 18'' wheels you actually NEED rft tires to steer properly (at least if running semis is not an option).
On 19'' rims if you choose rft you must be a masochist.
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03-04-2014, 06:01 PM | #48 | |
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As for the 18s, I definitely agree there can be some loss in steering "feel" but I do wonder if most people will notice or care.... For what it is worth, with the Dunlop ZII in 235/40/18 and 265/35/18 (tread is closer to semi slick type but compound is still suitable for street use) the steering feel is very nice, and similar to with the stock RFT |
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03-04-2014, 08:13 PM | #49 |
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A 40 ratio sidewall is still low profile. I have 18 RFT's on my Z and find that they lose grip too easily. My previous car was a Nissan 350z with 18" 40 series Toyo T1R's and held the road like it was on rails. The rubber required to hold the weight of the car has to be so stiff, It just doesn't hold the road like a non-RFT does.
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03-05-2014, 12:38 AM | #50 |
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I have 18 inch winter wheels without runflat and it works quite well. Perhaps it also is very important which type of tires you have. I use the Michelin Alpin Sport PA4 and they are great.
The side wall topic is the reason why I use 225/255 instead of 235/265. The 265 setup is not stiff enough due to the higher side wall. And by the way, if you buy the 19" inch wheel with the car, you get 19" inch RFT tires. It is unbelievable how less comfort they have. The only thing you can do is replace them, fast. Last edited by itf joegun; 03-05-2014 at 09:23 AM.. |
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03-05-2014, 12:58 PM | #52 |
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03-05-2014, 01:29 PM | #53 |
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I wish BMW still offered the Fox Red interior like they did for the E85. It's a great color, especially with silver paint.
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03-05-2014, 08:27 PM | #54 |
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same thing
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03-06-2014, 03:06 AM | #55 |
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Having experience on 18s with rft, contis sc3 and bridgestone s007 the latter two have ALWAYS been ''vague'' at higher speeds and were building heat up really quickly on curvy roads actually to the point of feeling like driving on balloons after a while.
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03-06-2014, 03:18 AM | #56 |
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Anyone else reach this conclusion? If yes, maybe I'm not driving fast enough. I don't feel any difference in terms of inferior steering when I made the switch from RFTs to nons. All I know is that they feel more planted.
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03-06-2014, 04:57 AM | #57 |
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03-06-2014, 12:13 PM | #58 |
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03-06-2014, 12:55 PM | #59 | |
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If you have ever switched from a competition style summer tire to a winter tire, you will have experienced an extreme case of what jannisa is talking about.... It is also is possible the PSS has a stiffer sidewall than the 2 non RFT jannisa is commenting on. Also, I think the heat build up depends on the specific tire, as opposed to RFT vs. non RFT. Even among the factory RFT, I have found the RE050A (the E89 19" OEM) heat build up is worse than RE050A I (E89 18" OEM) and RE050A II (E90 17" OEM). I have tracked all 3 of these RFT while trying to burn off the the treads.... |
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03-06-2014, 01:25 PM | #60 |
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Very interesting find nicknaz regarding differences between 18'' and 19'' rft.
Well the pss(s) and michelins in general are renown for excellent grip but notorious for very soft sidewalls resulting in heat inflation. A couple of friends with e46 m3s warned me against choosing them for that matter. Don't get me wrong, bragging to being able to bring a product beyond its limits is foolish if not criminal, I actually drive on public roads like a virgin. It's just that few occasions when you have the opportunity to enjoy that 300+ hp car and at that moments non rft were extremely limiting.
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03-06-2014, 03:57 PM | #61 | |
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I guess I have never been super impressed by Michelins. They have always seemed to be an overrated tire, and the front runners in the street tire classes I've seen or heard results from are never using a Michelin tire. Good upgrade from stock tires, but not a competitive tire... |
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03-06-2014, 08:36 PM | #62 |
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If not michelins, than what do you recommend? I don't track my car, but I like to push it when I can. Right now I am looking at pilot sport a/s3's, potenza re 970a/s, or Pirelli P zero Nero a/s. I want all-seasons as I live in an area with a short summer and all-seasons buy me a month more driving at each end of the season. I was leaning toward michelins, but haven't decided yet. Looking for some opinions.
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03-07-2014, 09:59 AM | #63 |
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03-07-2014, 11:47 AM | #64 | |
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03-08-2014, 11:27 AM | #65 |
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When changing to non-RFTs, do most of you stick to the factory sizes for both rim and tires? I have 18" rims. I don't really want to compromise ride quality, but I am looking for a bit more grip. Would 19" wheels be rougher than 18" RFTs? Just looking for some opinions
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03-12-2014, 05:27 PM | #66 |
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Another vote for NON runflats on the E89. If ever there was an overused cliche then night and day difference is one of them, but truly the runflat tyre on this car ruins it completely here in the UK with the terrible roads we have.
I've gone to Michelin Pilot Super Sports and now completely love the car. The ride is firm, but the car is not harsh, and the damping feels suitably sporty and expensive. This is on 19's too. I have 17 inch winter wheels that are non runflat too and I didn't feel that the were that much better so I'm very happy with my big wheels- they look tremendous!
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