[johnung]

Originally Posted by boyerizm

I got the wheels from some guys in Jersey rimsus_nyc through eBay. 18x8 just like what came with the car.

And the Continentals from TireRack 225/45ZR-18 CONTINENTAL EXTREMECONTACT DWS 06 PLUS SL

I nearly stepped up to the 19s but read some posts that it really wasn't worth it unless you were going for that slammed look, which I was not. That said next mod is gonna be some Dinan springs, not to lower it per se but to tighten up the suspension a bit more.

What year & model? RWD or XDrive? There may be some other options to consider to tighten up your suspension

[ATL_Nak-Muay]

I have rft's as well. I will be replacing the original set before too long, as I don't drive it much. We can run zr's year round here so I'll be there next.

[boyerizm]

Originally Posted by johnung

What year & model? RWD or XDrive? There may be some other options to consider to tighten up your suspension

Cool, thanks! I'm totally open to suggestions. While shopping I test drove a 240i and an M2 and both just felt way more planted to my liking. The 3 feels like it gets a bit floaty in the front end. But the dog and gf won and I went with 4 doors.

I'm not looking to go crazy since the roads by me are terrible, but a bit stiffer would be nice.

She's a 2013 328i xDrive M-Sport.

[johnung]

Originally Posted by boyerizm

Cool, thanks! I'm totally open to suggestions. While shopping I test drove a 240i and an M2 and both just felt way more planted to my liking. The 3 feels like it gets a bit floaty in the front end. But the dog and gf won and I went with 4 doors.

I'm not looking to go crazy since the roads by me are terrible, but a bit stiffer would be nice.

She's a 2013 328i xDrive M-Sport.

There are several components contributing to that suspension feel. I'm not a big fan of Dinan springs on an XDrive. They are overly stiff and lower all four corners equally, not desirable when the XDrive has reverse rake.

Do you have stock runflat tires in 225/45-18? If so you can upgrade to non-runflats in 245/40-18 for great handling and much better ride on rough roads. Continental DWS06 Plus and Michelin Pilot Sport A/S4 all seasons are excellent choices.

A lot of the vague feel in the front end and steering is due to the big fluid filled Upper Control Arms bushings. Swap out the Upper Control Arms for these Monoball UCA's. Huge improvement. Easily one of the best mods that I've done.

https://www.kiesmotorsports.com/prod...8;_ss=r?aff=22

The stock springs and shocks are weak. A great replacement combination are Koni Special Active Shocks and Eibach springs. See photos. Great control and ride. They lower the front more than rear to eliminate some reverse rake.

If you have Adaptive/EDC shocks then just swap in the Eibach springs.

Hope this helps!

[boyerizm]

Originally Posted by johnung

There are several components contributing to that suspension feel. I'm not a big fan of Dinan springs on an XDrive. They are overly stiff and lower all four corners equally, not desirable when the XDrive has reverse rake.

Do you have stock runflat tires in 225/45-18? If so you can upgrade to non-runflats in 245/40-18 for great handling and much better ride on rough roads. Continental DWS06 Plus and Michelin Pilot Sport A/S4 all seasons are excellent choices.

A lot of the vague feel in the front end and steering is due to the big fluid filled Upper Control Arms bushings. Swap out the Upper Control Arms for these Monoball UCA's. Huge improvement. Easily one of the best mods that I've done.

https://www.kiesmotorsports.com/prod...8;_ss=r?aff=22

The stock springs and shocks are weak. A great replacement combination are Koni Special Active Shocks and Eibach springs. See photos. Great control and ride. They lower the front more than rear to eliminate some reverse rake.

If you have Adaptive/EDC shocks then just swap in the Eibach springs.

Hope this helps!

Wow, thanks for sharing this. I can definitely vouch for switching to the Continentals, just did last week.

As for the springs, good call on the non-equivalent lowering front to back. I hadn't noticed the reverse rake until I took a profile shot of my car the other day.

Going all in with the controls arms and the shocks/struts seems like the way to go. And…my gf thought I was gonna buy her a new sofa with my Christmas bonus lol.

[johnung]

Originally Posted by boyerizm

Wow, thanks for sharing this. I can definitely vouch for switching to the Continentals, just did last week.

As for the springs, good call on the non-equivalent lowering front to back. I hadn't noticed the reverse rake until I took a profile shot of my car the other day.

Going all in with the controls arms and the shocks/struts seems like the way to go. And…my gf thought I was gonna buy her a new sofa with my Christmas bonus lol.

Great! My wife still thinks I'm saving to take her to Hawaii, but BMW parts cost money! Also along with the Eibach springs, swap out the stock bump stops for shorter F80 bump stops. See photo

[Onizukachan]

I gave it a really hard look, but for f31 xdrive, the koni SA struts + bump stops + eibachs from the polish rally guy on eBay were within a couple Hundos of the KW Street comforts, so i did the KW. I can set it where I want it to sit… currently 1.5” down front and 1.0 down rear.

[johnung]

Originally Posted by Onizukachan

I gave it a really hard look, but for f31 xdrive, the koni SA struts + bump stops + eibachs from the polish rally guy on eBay were within a couple Hundos of the KW Street comforts, so i did the KW. I can set it where I want it to sit… currently 1.5" down front and 1.0 down rear.

Sounds like a great choice. Can't go wrong with KW's. Please keep us posted on your daily driving impressions.

I was researching options for my F30 335i XDrive. Below is some data that I collected.

My dampers are Koni Special Actives. The springs are Eibach XDrive springs (with -06 in part number)

Spring Rate Comparison
—————————————

Eibach
Front 194/Rear 542 lbs/in

KW Street Comfort
Front 226/Rear 575 lbs/in

KW V1,V2,V3
Front 226/Rear 630 lbs/in

So the KWs are a bit stiffer than the Eibachs but not a huge difference. (By comparison the H&R's and Dinan's can be 30% stiffer than stock.)

Basically comparing KW-SC spring rates to Eibach spring rates:
Front +16%/Rear +6%

Hope this helps!

[ewizzle]

Originally Posted by boyerizm

I got the wheels from some guys in Jersey rimsus_nyc through eBay. 18x8 just like what came with the car.

I think these are the same wheels that I have in my cart - haven't pulled the trigger on purchasing them. I've been told to always to with like a reputable place especially for wheels. What's your thoughts on these?

Quality? Durability? Seattle roads are awful and not the kindest on wheels.

[boyerizm]

Originally Posted by ewizzle

I think these are the same wheels that I have in my cart - haven't pulled the trigger on purchasing them. I've been told to always to with like a reputable place especially for wheels. What's your thoughts on these?

Quality? Durability? Seattle roads are awful and not the kindest on wheels.

Well they've handled Chicago roads for the last couple weeks. Not exactly a long term test but so far so good. They look fantastic in person.

[webtemp]

Thank you for sharing. ( I need to make 4 posts and wait 1 hour. )

[boyerizm]

Originally Posted by johnung

Great! My wife still thinks I'm saving to take her to Hawaii, but BMW parts cost money! Also along with the Eibach springs, swap out the stock bump stops for shorter F80 bump stops. See photo

Hey while we're talking suspension, what are your thoughts on sway bar links? I'm reading they should be swapped out on lowered cars but don't see a lot of discussion on this.