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[Jkuo]

Hello there, I have e92 335i 18" sport wheels(225/40/18 and 255/35/18), I want to make the ride more comfortable by changing to Continental ExtremeContact DWS, my question is can I make it 45 or even 50 in the front and 40 or even 45 in the back? If you know how to make the car more comfortable in other ways please tell me. Thank you

[Tallest]

by increasing wheel diameter you'll gear the car up and cause strain on drivetrain, even if small. long term it's not engineered into the car so ... if it's a lease go for it i guess.

alternatively, you could get a softer but better spring shock combo (from KONI/EIBACH, ALPINA).

and as another option, go down a size on wheels, get yourself 17s wiht non runflats. ditching runflat is always very good for ride comfort as many (myself included) will attest to.

[remmib]

I've seen 225/45/18 on an e92, so I think you can make 225/45 and 255/40 work. But forget about 50 and 45 profile.

[ALUFELGEN]

Changing your RunFlat tires to non-RunFlat tires will be an improvement already. The RFT are very harsh and have very stiff sidewalls. Try changing the tires to non-RFTs and that`ll be your best way to improve comfort.

Matt
ALUFELGEN Wheels

[cssnms]

Read this...

http://www.e90post.com/forums/showthread.php?t=468178

[VMRWheels]

I would suggest sticking to the recommended diameters to have the most accurate speedo and odometer. The change from a RFT to a Non-RFT is already a huge difference in comfort and I am quite sure you'll love the improvements already.

-Charles@VMRWheels

[Jkuo]

Thanks guys! two quick questions, can you guys suggest me a few brands/series that focus more on comfort? will non-run flat tires get bubbles easy like the run flat?

[HighlandPete]

From what I understand it's run-flats that really suffer from the bubble damage, seems you guys in the US have a bigger issue with that, than we seem to get in the UK.

For comfort, I'd be looking to a performance/touring tire, rather than an ultra high performance tire which typically is a stiffer construction.

I'm sure you'll get some specific tires recommended to US market spec'.

If you are wanting further mods, I've fitted the Koni FSD dampers (shocks) and that improves the comfort factor without losing the primary ride control.

HighlandPete

[BMWsky]

I agree with the non-RFT recommendations. My summer tires are the stock RFT's and my winters are non-RFT. My winter tires are far more comfortable...but they're also 17's vs my summer's which are 18".

[cssnms]

There are lots of choices out there, but it all boils down to your intended purpose. The Continental DWS is a well balanced all-season performance tire which will work out well for you in NY if you don't plan to run dedicated snow tires or track your car. I have been very happy with them. I switched from a 45 series tire on a 17" rim to a 35 and 30 series tire on staggard 19" rims and according to my butt-o-meter the ride is softer/more comfortable than the 45 series RFT's and handling/driver feel improved dramatically. The improvement though is simply a function of how stiff the side walls are on the RFT's.

More reading for you...

http://wot.motortrend.com/fast-and-g...erit-4007.html

http://www.e90post.com/forums/showthread.php?t=302424

[captainaudio]

Originally Posted by Jonathankuo

Hello there, I have e92 335i 18" sport wheels(225/40/18 and 255/35/18), I want to make the ride more comfortable by changing to Continental ExtremeContact DWS, my question is can I make it 45 or even 50 in the front and 40 or even 45 in the back? If you know how to make the car more comfortable in other ways please tell me. Thank you

I went for months feeling like the the fillings were getting shaken out of my teeth and having the car feel like it was about to break in half when I hit a construction plate, frost heaves or pot holes when driving on the roads of the NorthEast in my 2007 335i with sport package.

I replaced the RFTs with regular tires (Pirelli P_Zero Nero) and I replaced the shocks with Koni FSDs. The car was completely transformed. It handles better than it did stock and although the suspension is still firm (as would be expected in a car that is geared toward performance) but the harshness and crashiness over road imperfections and the 'Pothole Explosions" have been eliminated. The improvment in ride comfort is not subtle, it is an order of maginitude,

Before I changed out the shocks I destroyed 5 tires and bent 4 rims. I have only had the Konis on the car since early December so it is not a fair comparison but so far so good in the wrecked tire/bent wheel dept.

CA

[ianbiz]

Originally Posted by VMRWheels

I would suggest sticking to the recommended diameters to have the most accurate speedo and odometer. The change from a RFT to a Non-RFT is already a huge difference in comfort and I am quite sure you'll love the improvements already.

-Charles@VMRWheels

This. I went from RFTs on the stock 18s to 19s CSLs w/o rfts and its still softer.

[Jkuo]

Thanks again guys! these suggestions really help me, I will change my tires to DWS first and if I want more comfort, I will get Koni FSD dampers.