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      10-08-2010, 02:33 AM   #1
Veritable
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255 / 275/35R19 DWS Mounted

Excuse the dirty tires... they're bought from Bimmerpost supporting vendor Tire Rack and then JUST mounted and road-force balanced by Bimmerpost supporting vendor Brian Jessel Autohaus.

F 255/35R19, R 275/35R19, Continental ExtremeContact DWS, on stock F 8.5in R 9.5in 220M wheels, stock suspension.

A bit of a wrap for the rear wheels, but should be within spec and I guess that offers slightly more rim protection?

Only gotten about 30km on them so far so just basic impressions for now. Understeers so far, but obviously won't be pushing on them until the slippery rubber wears off. Also, boy are they quiet! Compared to the constant rumbling that PS2s have always had, these are almost... peaceful.

Bring on the rain and the 2 weeks of snow! Heck, the dirty tire sidewalls and the blocky outside tread pattern make them look like I've plowed through some white stuff already, a total winter tire look :P









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      10-08-2010, 08:45 AM   #2
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when's the earliest snow?
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      10-08-2010, 08:10 PM   #3
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Wow -- just got my DWs today. They look quite different than the DWS. So far I LOVE THEM! What a great tire - not only quiet, but the ride is much more comfortable. No PS2 bump and grind.
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      10-09-2010, 01:32 PM   #4
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Quote:
Originally Posted by mdosu View Post
when's the earliest snow?
Vancouver always has a couple weeks of snow per year. Sometimes we get it around Christmas, sometimes as late as February.

Heavy rainfall warning for this afternoon, though, and the wet stuff will continue until April or so. That's the Pacific Northwest for ya.

The PS2s were also amazing in the rain, but supposedly so are these. Bring it on!
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      10-11-2010, 08:51 PM   #5
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I keep hearing nothing but great things about those tires.
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      10-12-2010, 07:13 PM   #6
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Hey they look damn good. Just waiting to decide between DWS in exactly your sizes or Pilot Sport 2 Plus. I'd be curious to hear more of your driving experiences but like you, I won't be pushing the cold weather/slight snow tires anytime soon.

Thanks for posting!!!
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      02-27-2011, 05:53 AM   #7
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Sorry about the thread bump-age. Gotten a GoPro now so I've been recording my time behind the wheel. Here's these tires in a mountain drive:



The DWSs are plenty grippy enough for my needs in the dry, as you can see... I don't think I would be much faster in summer tires there, and I might not want to be.

Snowed for about 3in tonight, though, and had to get to a wedding banquet and back. Here's the result:



Fine in powder, fine to manuever, fine on flat ground even when stopping or starting, but unfortunately not fine having to stop on a hill, then start off again on packed down snow -> ice. Good thing I was only 2 blocks from home, so I was able to park properly (no stereotypical abandoned BMW here!), walk home to grab a shovel, clear out a 5ft patch behind my rear wheels, back up, and get going. Once I got to the unplowed and sparsely-travelled side streets, no problem at all, even stopping for stop signs and going up hill.

Both videos, all on the same tires!
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      02-27-2011, 08:05 PM   #8
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Your stock suspension looks lower than mine. Your car looks great.

Have fun in the snow! My Dunlop Wintersport 3Ds have been great too. See you around town!
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      03-03-2011, 03:31 PM   #9
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Nice
will do this set up next winter!
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      03-06-2011, 09:29 PM   #10
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OP, are you running spacers in the front?...if not, then I guess the 255/35/19 fitsd without rubbing?
Thanks
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      03-09-2011, 02:28 PM   #11
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255/35 will fit fine without any rubbing. I had the exact same tires and i loved them!
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      03-09-2011, 07:07 PM   #12
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Quote:
Originally Posted by Veritable View Post
F 255/35R19, R 275/35R19, Continental ExtremeContact DWS, on stock F 8.5in R 9.5in 220M wheels, stock suspension.
Hey man, did you compare the unmounted DWS and PS2s (front and rear separately) side to side to see the differences in width and height? Some tires are wider than others in the same size, and I assume the same thing with the profile. Just curious. I don't want to deviate from stock, but Michelins are known to run a bit wider than normal, so they might be pretty similar. Thanks.
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      03-10-2011, 08:42 AM   #13
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either brand will fit.. If my memory serves me correct I believe some M3's have come with Michelins. There is plenty of room for any brand.
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      03-13-2011, 09:40 PM   #14
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255 / 275/35r19 Dws

OP. Curiosity, why did you go with the larger sizes? 255 and 275? DWS comes in 245/35 for the front but only 265/30 for the rear. I'm interested in getting a set all around but just wanted to understand your thoughts.

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      03-13-2011, 10:35 PM   #15
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Quote:
Originally Posted by boilator View Post
OP. Curiosity, why did you go with the larger sizes? 255 and 275? DWS comes in 245/35 for the front but only 265/30 for the rear. I'm interested in getting a set all around but just wanted to understand your thoughts.

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Veritable will likely chime in, but I'll take a stab at the reasons for 255/275. Since the larger tires fit, you have the opportunity for a bit more rubber on the ground. With a 265/35 not being available, the choice is either a 265/30 (higher revs per mile than a 265/35 and even worse than standard speedometer error) or the 275/35 (more rubber and less speedometer error). Once you decide on the 275/35, the 255/35 has the advantage of maintaining the standard front to back tire stagger (in theory maintaining handling balance). You can stick with the 245/35 but they will likely cause your car to understeer a bit more at the limit.
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      03-14-2011, 01:10 AM   #16
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If you want anything other than max summer, we have no choice but to go a size larger. And yes, it's definitely best to go a size up all around. Don't know why the hell BMW chose a tire size nobody makes, but I've been waiting for an ultra-high-performance all-season for over 2 years, and appears nobody is going to make them in stock 19 sizes, so will get the DWS. Only problem is I checked yesterday, and they're backordered until the end of days. Geez.
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      03-18-2011, 02:53 AM   #17
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I remember when I first started looking at tires, searching for the stock M3 220M wheel sizes yielded nothing but PS2s, PZeros, Advans and R-comps. It's like the tire manufacturers conspire to not offer the exact sizes for certain tire categories to skew search results :P

So I've decided on getting the DWSs, and they are available in the stock front size. Unfortunately, not available in the stock rear size (so I guess they won't show up if you go to Tirerack and just search for tires by vehicle). 265/30R19 is much too small. So, I ended up with 1% bigger rolling diameter and 255/35R19 F 275/35R19 R. They put me well within the 3% rolling diameter deviation, maintains the stagger, and slightly "fixes" the well-known BMW fast speedo to boot.

Both the DWSs and the Pilot Sport A/S Plus are available in those sizes, and you can't go wrong with either.
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      03-18-2011, 09:55 AM   #18
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Quote:
Originally Posted by calintexas View Post
Veritable will likely chime in, but I'll take a stab at the reasons for 255/275. Since the larger tires fit, you have the opportunity for a bit more rubber on the ground. With a 265/35 not being available, the choice is either a 265/30 (higher revs per mile than a 265/35 and even worse than standard speedometer error) or the 275/35 (more rubber and less speedometer error). Once you decide on the 275/35, the 255/35 has the advantage of maintaining the standard front to back tire stagger (in theory maintaining handling balance). You can stick with the 245/35 but they will likely cause your car to understeer a bit more at the limit.
What is the stock speedo error rate at?
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      03-18-2011, 11:32 AM   #19
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About 3mph
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      03-18-2011, 01:24 PM   #20
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Quote:
Originally Posted by Veritable View Post
IBoth the DWSs and the Pilot Sport A/S Plus are available in those sizes, and you can't go wrong with either.
Don't know anything about the latter, but might have to look into them if the backorder lingers. I want the quietest tire possible in that category (UHP A/S).

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What is the stock speedo error rate at?
It's about 4% in my car.
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      03-18-2011, 02:23 PM   #21
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Quote:
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It's about 4% in my car.
That sounds about right for my car too. It is pretty optimistic. I haven't checked the odometer.

Here's some info on the impact of tire sizes from the Tire Rack PS2 spec tables:
  • A 275/35 will decrease your revs per mile by about 1%.
  • A 275/30 will speed it up by about 3%.
  • A 285/30 will speed it up by about 2%

I've been thinking in terms of speedo error, but I've just realized that I don't know where BMW is picking up the speedometer signal. It could be from a front wheel. A 255/35 has 1% less revs per mile than a 245/35. So; however the speed is measured, one size up on both ends reduces speedometer error by about 1% overall.
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      03-18-2011, 03:27 PM   #22
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Quote:
Originally Posted by calintexas View Post
I don't know where BMW is picking up the speedometer signal.
All modern cars get it from the tranny; that's why changing tire diameter increases or decreases speedometer error. I'm not sure how the ECU interprets wheel speed sensor input for DSC/TC purposes, but it only needs relative differences.. along with input from the yaw sensor, obviously.

As far as odometer accuracy, most cars are pretty accurate. But for some weird reason, most cars are WAY more optimistic with the speedometer than they need to be to cover their butts for understating speed lawsuits. I've used 3 different cars to the same destination, and all 3 recorded between 400.0 and 400.1 miles. And yes, the worst speedo error was the M3, according to the same police radar unit entering one of the towns, so apples with apples.
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