Alpinam3

I have the Lux package18 in 5 spoke wheels on my car with 235/40/18ZR in the front and 255/40/18ZR rear. Not sure what the exact 19 in tire size would be but pretty sure it's a 35 series tire. Anyone notice a different ride quality ? Tks.

metaleckz

iTrader: (9)

Yes but not so much where you feel everything on the road

leoferus

F/R 255/35/19/275/35/19

Frankly, the difference for me is hardly noticeable.

MWIS350

My is 18 and so far so good.

604GSE21

i found 18 gives a better ride cuz more side wall and 19 gives a little bit of a harsher ride due to less side walls... i found also depends on your wheel weight too but then again i could be wrong lol...

DickH

I went with lightweight 18" wheels and noticed an obvious improvement in ride quality. Maybe you should consider wheel weight if you are worried about ride quality.

Alpinam3

604GSE21. Your exactly right. The smaller the side wall (aspect ratio) the harder the ride. Also when your driving on the edge smaller aspect ratio as its called, tires break loose quicker so the reaction time the driver has to respond is decreased.

DickH what rims dos you go with ? Are they true forged or flow formed or cast ? Do you know weight ?

I'm looking for a lightweight wheel to save some spinning weight on acceleration.

DickH

I went with tsw interlagos, I am not sure the exact weight but the fedex shipping label said 20lbs for the 18"x9.5" which had a box within the box and all the packaging so probably 19-20lbs. They are cheaper wheels and I was worried about them at first but they turned out to have no problems so I am happy.

leoferus

Front: 245/35/19
Rear: 275/35/19

Using the tire size calculator, I come up with this:

Front sidewall height stock vs 19s: 3.5"/3.5"

Rear sidewall height stock vs 19s: 3.5"/3.4"

So, technically, no difference. If you calculate the right combo that your suspension and fenders can accomodate, you should not really notice much of a negative impact. In my case, going from heavy chrome 18s to lighter 19s while keeping the sidewall height about the same yielded, primarily, positive results. My only issue was having to roll the rear fenders.

Alpinam3

That's not entirely true because it's not just the distance. It's the distance based upon the rest of the tire. Since the aspect ratio is a percentage of the tread. So the whole tire must be considered. I used to have a couple of M3s (e42) and M5 (e39).
Used to swap tires and rims out for track use. Some of my tires were 19s and 18s. I could feel the stiffer ride with the wider tire even though the aspect was technically the same. I was just wondering what some others have experienced here.

flowrider

iTrader: (9)

Of course there's a difference. You're increasing the OD by 1". That will throw off the speedometer and the electronics. Not something I would do.

Lou

SeanO

iTrader: (1)

I don't think thats what he planned on doing..

I used to have the 18" Lobster claw wheels that came stock on my 2010 and I upgraded to 19's last year.. I can definitely notice a difference but I would say only over the harshest of bumps (which I try to slow down for anyway) I only really notice the front as the rear has a fatter tire on it.

Gville350

iTrader: (10)

Assuming the wheels were similar in weight and the tires had the same sidewall (35/40/etc), they would feel the same. Change the wheel weight significantly or the tires to something with more sidewall, then yes, it would make a difference.

flowrider

iTrader: (9)

^^^^There's so many reasons why that's not true

Lou

ItWasntMe

I noticed a difference, but wasn't too bad.