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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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Old 07-07-2014, 07:56 AM
Joe3skidoos Joe3skidoos is offline
Location: Canada
Join Date: Jul 2014
Posts: 9
Mein Auto: 2007 335i Coupe / 6s MT
RFT or not RFT that is the question

I purchased a 2007 335i about 3 months ago and it has Bridgestone Potenzza run flats on it. The car has the sport package, so the tires are 225/35 R 19 on the front and 255/30 R 19 on the rear. These tires stick like glue and are lots of fun on twisty roads (as long as the pavement is reasonably smooth). However, they are quite noisy and shall I say "Bone Jarring" on broken pavement.
[*]Any suggestions on suitable replacements (that are not run flat)?[*]Can non-run flats be installed on the same rims?[*]Will non-run flats with this profile be significantly smoother and quieter?[*]What is the best way to deal with the possibility of encountering a nail vs tire situation miles from nowhere? I would definitely prefer not to carry a jack and spare.

BTW, I would be willing to sacrifice a bit on performance in the interest of comfort.
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Old 07-07-2014, 08:09 AM
luigi524td luigi524td is online now
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Location: The State of Southern NJ
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Posts: 2,783
Mein Auto: '17 540xDrive; '98 Z3 2.8
I had the Bridgestone RFT on my '07 530xi and they did begin to get noisy as the tread wore to the half-way point. But that was a tire that was developed 7+ years ago - they have IMHO improved greatly though are still subject to impact damage (ESP very-low profile versions). You can fit conventional tires of the proper size on the original equipment rims on your 335 - as for ride and other qualities well, that totally depends on how each tire is engineered. Some are designed to stick and handle - others are meant to provide longer tread life ... etc etc.

I recommend you read tire tests and reviews on Tirerack and other tire-specific websites for a broader look at how tires behave and what people are saying about them.
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Old 07-07-2014, 08:28 AM
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need4speed need4speed is offline
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Location: South Carolina
Join Date: May 2006
Posts: 5,145
Mein Auto: 16 435 CV Msport PPK
Buy real tires and a spare/jack kit for the price of RFT. RFT=
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Old 07-07-2014, 08:29 AM
sunny5280 sunny5280 is offline
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Location: Denver, CO
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Mein Auto: 2011 X5-M
It's my opinion the suspension on the E9x series cars is the problem. While moving to a non-RFT can improve the comfort any such gain is only minimal.
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Old 07-07-2014, 09:20 AM
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captainaudio captainaudio is offline
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Mein Auto: M4 Cabrio - Cayenne GTS
Get rid of the RFTs and replace the OEM shocks with Koni FSDs and you will get better handling and much better ride quality,


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Old 07-07-2014, 10:21 AM
Turborascal Turborascal is offline
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Location: Austin, TX
Join Date: Mar 2014
Posts: 281
Mein Auto: 2011 E92 335is
This topic has been covered ad nauseum in other threads.

After searching and reading input from others, I purchased Michelin Pilot Super Sport "go-flats" and a spare tire kit for my 335is with 19" wheels.

The handling, road noise, and comfort level are improved, though handling and comfort will surely benefit (per captainaudio) from a future shock replacement with Koni FSD shocks.
2011 Black Sapphire Metallic 335is Coupe | DCT | Luxury Pkg | Convenience Package | Cold Weather Package | iDrive/Nav/Sirius | Michelin Pilot Super Sports on 19" 313s
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Old 07-08-2014, 05:13 PM
Joe3skidoos Joe3skidoos is offline
Location: Canada
Join Date: Jul 2014
Posts: 9
Mein Auto: 2007 335i Coupe / 6s MT
Thanks for the help. I'm getting a CDV mod put in next week. I will check with the shop on a price for the Koni FSD's when I'm there. I will probably have to live with the Bridgestones for a time. There is currently too much tread left to truff them.
Present: 2007 335i Coupe / 2004 Toyota 4Runner
Past: 1961 Ford Anglia / 1969 Merc Cougar XR7 / 1972 Plymouth Road Runner (440 cid/4 barrel/4 sp MT)

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Old 07-08-2014, 05:24 PM
LBK335i LBK335i is offline
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Location: Lubbock,Tx
Join Date: May 2013
Posts: 65
Mein Auto: 2009 335i
running 19" Style 230's here, ditched the RFT's for Michelin PSS with a ContiComfort Kit in the trunk. One of the best things I ever did for my ride. Tirerack.com worked great

2009 E92 N54 Black Sapphire, Cream Beige Dakota, ZPP, ZSP,2R4,Steptronic, JB4 G5 ISO, DCI
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