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      10-02-2014, 09:46 AM   #1
irablumberg
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Installed Yok. AD08r 275 / 295 tires

Update 10/26/14: photos added, 1 shot straight on from front, 1 shot straight on from rear, 1 shot along side

Update: photos added, 1 shot of the front, 2 shots of the rear.

I just replaced the stock MPSS tires on my M4 with 275/30-19 front and 295/30-19 rear Yokohama AD08r tires. I'm still using the stock wheels. I'll try to get pictures by the weekend. Meanwhile, I think the set up looks very good. There is not any significant "bulge" in the sidewalls out beyond the edge of the rim. The sidewall flares out slightly, but it does not look radically different than the stock tire set up.

My observations so far are as follows (based on 40 miles of driving on public roads).

* The sidewalls on the AD08r are much stiffer than the MPSS. On the adaptive suspension, Comfort Mode now feels almost as firm as Sport. I don't mind this as it also gives the car a much greater feeling of control. I still drive in Sport mode and at least on the decent roads in my area, the ride is fine.

* Steering feel is heavier than stock. I use Sport mode for steering and it does feel like the steering weight has increased. This does amplify the effect that some have reported of slightly numb on center feel followed by fairly heavy off center feel. I believe I will get used to the new steering feel in just a few days. It also feels like I get more steering feedback now. In particular, I get a better sense of the road surface. Smooth roads still feel smooth. I can definitely now feel roads surfaces with small bumps or undulations much more clearly than with the stock tires.

* Tire noise is slightly louder than the MPSS, but not at all problematic even at 75-80 MPH.

* The tires appear to fit with no rubbing. I am using stock 19" wheels and no spacers. The tires do poke out from the fenders just a bit more than stock, but it looks good.

* With only 40 miles on the tires, it is a bit early to get a sense of traction. However, I did a few full throttle stomps from a 5 MPH roll accelerating to between 60 and 70 MPH (except for the one where I was a bit slow to react and suddenly I was going 80+ MPH). Out of 5 or 6 tries, I only had traction control intrude and cut power once. This may have been due to crap in the road. On at least 2 of the tries the traction light did not illuminate at all. On the others, the traction light blinked very briefly, but I felt no loss of power. This is already better than the performance of the stock MPSS. With the stock tires I would regularly feel power getting cut when I inadvertently accelerated too hard (not full throttle) from a stop light.

* There are very few roads with any "fun" curves in my area. As a result, I don't know if I will be able to get a real sense of changes in dynamic or steady state cornering. There is one 270* freeway ramp posted at 25 MPH that I previously took at 50 MPH. I will see how the car does on this bit as soon as I have a clear shot.

So far I do like the changes these tires have provided. I do think they will hook up much better than stock once they are fully scrubbed in. This is not a cheap upgrade, but I am happy with it.
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Last edited by irablumberg; 10-26-2014 at 03:38 PM.. Reason: Added photos
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      10-02-2014, 09:50 AM   #2
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Cool! Waiting for pics.
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      10-02-2014, 10:44 AM   #3
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Quote:
Originally Posted by irablumberg View Post
I just replaced the stock MPSS tires on my M4 with 275/35-19 front and 295/30-19 rear Yokohama AD08r tires. I'm still using the stock wheels. I'll try to get pictures by the weekend. Meanwhile, I think the set up looks very good. There is not any significant "bulge" in the sidewalls out beyond the edge of the rim. The sidewall flares out slightly, but it does not look radically different than the stock tire set up.

My observations so far are as follows (based on 40 miles of driving on public roads).

* The sidewalls on the AD08r are much stiffer than the MPSS. On the adaptive suspension, Comfort Mode now feels almost as firm as Sport. I don't mind this as it also gives the car a much greater feeling of control. I still drive in Sport mode and at least on the decent roads in my area, the ride is fine.

* Steering feel is heavier than stock. I use Sport mode for steering and it does feel like the steering weight has increased. This does amplify the effect that some have reported of slightly numb on center feel followed by fairly heavy off center feel. I believe I will get used to the new steering feel in just a few days. It also feels like I get more steering feedback now. In particular, I get a better sense of the road surface. Smooth roads still feel smooth. I can definitely now feel roads surfaces with small bumps or undulations much more clearly than with the stock tires.

* Tire noise is slightly louder than the MPSS, but not at all problematic even at 75-80 MPH.

* The tires appear to fit with no rubbing. I am using stock 19" wheels and no spacers. The tires do poke out from the fenders just a bit more than stock, but it looks good.

* With only 40 miles on the tires, it is a bit early to get a sense of traction. However, I did a few full throttle stomps from a 5 MPH roll accelerating to between 60 and 70 MPH (except for the one where I was a bit slow to react and suddenly I was going 80+ MPH). Out of 5 or 6 tries, I only had traction control intrude and cut power once. This may have been due to crap in the road. On at least 2 of the tries the traction light did not illuminate at all. On the others, the traction light blinked very briefly, but I felt no loss of power. This is already better than the performance of the stock MPSS. With the stock tires I would regularly feel power getting cut when I inadvertently accelerated too hard (not full throttle) from a stop light.

* There are very few roads with any "fun" curves in my area. As a result, I don't know if I will be able to get a real sense of changes in dynamic or steady state cornering. There is one 270* freeway ramp posted at 25 MPH that I previously took at 50 MPH. I will see how the car does on this bit as soon as I have a clear shot.

So far I do like the changes these tires have provided. I do think they will hook up much better than stock once they are fully scrubbed in. This is not a cheap upgrade, but I am happy with it.
Finally!!! I love my 19 stock black wheels.. Post pics damn it lol. Wonder is 305s could fit in the back??? What about if I lower the car on h and r springs?
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      10-02-2014, 11:46 AM   #4
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275/35-19 and 295/30-19? did the car get mad about these diameters? is there a reason you chose this setup over 275/30-19 and 295/30-19, which much more closely matches the stock height stagger? also, pics please!!
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      10-02-2014, 11:51 AM   #5
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Quote:
Originally Posted by fourtailpipes View Post
275/35-19 and 295/30-19? did the car get mad about these diameters? is there a reason you chose this setup over 275/30-19 and 295/30-19, which much more closely matches the stock height stagger? also, pics please!!
Sorry, my mistake, it is 275/30-19. Original post now corrected.
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      10-02-2014, 11:56 AM   #6
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Quote:
Originally Posted by irablumberg View Post
Sorry, my mistake, it is 275/30-19. Original post now corrected.
I know you got a smartphone bro where da pics at
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      10-02-2014, 02:04 PM   #7
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Excited to see pics!
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      10-02-2014, 06:09 PM   #8
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Very nice!! End results looks good.. I'm sure it'll be a + once you get the chance to go around some curves
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      10-02-2014, 06:21 PM   #9
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Nice pics can you take one from behind the car as well and front?
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      10-02-2014, 06:24 PM   #10
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Once I wear out the Michelins I'll strongly consider the Yokohamas. I had really great results with them on a prior car.
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      10-02-2014, 06:50 PM   #11
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Any issues with rubbing in front when turning steering wheel lock to lock?
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      10-02-2014, 07:00 PM   #12
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Quote:
Originally Posted by KASM3 View Post
Any issues with rubbing in front when turning steering wheel lock to lock?
No way with that much of a gap!
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      10-03-2014, 06:46 AM   #13
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Quote:
Originally Posted by /// M sa View Post
No way with that much of a gap!
I bet you could run these with eibach or hr sport no problem. I think they look good!
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      10-03-2014, 06:57 AM   #14
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Quote:
Originally Posted by dmk08 View Post
I bet you could run these with eibach or hr sport no problem. I think they look good!
Well winter soon will be here so winter tires first and my set up next spring will be 305s and 275s on stock wheels
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      10-03-2014, 07:07 AM   #15
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So 275 went upfront instead of 255, but the rim is still 9"?

Surprised it's not muffin topped. Looks good.
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      10-03-2014, 07:15 AM   #16
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I would be interested to know how this change translates to responsiveness and "feel" of the car.

Clearly more ultimate grip (which is a great thing) and it looks good too but I wonder if the sidewall not being as supported by the wheel will make the car feel sloppy, for lack of a better word, on steering input and side to side transitions. Maybe not given the stiffer sidewalls of the AD-08 and the fact that they are a more responsive tire generally than the PSS.

It would be great if the car still felt as responsive as on OEM tires but with better ultimate grip. It would save the investment on a new set of wheels

P.S. What tire pressure are you running? The outside 1.5" of the tire isn't even getting dirty or apparently touching the ground I wonder if that is a function of the narrow wheel or from too high of a tire pressure?
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      10-03-2014, 07:46 AM   #17
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Yeh IMO the wheel/tire size vs amount of stock torque is the worst part of the new car. I guess they stayed with the installed sizes for ride quality or something.
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      10-03-2014, 08:05 AM   #18
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Quote:
Originally Posted by gthal View Post
I would be interested to know how this change translates to responsiveness and "feel" of the car.

Clearly more ultimate grip (which is a great thing) and it looks good too but I wonder if the sidewall not being as supported by the wheel will make the car feel sloppy, for lack of a better word, on steering input and side to side transitions. Maybe not given the stiffer sidewalls of the AD-08 and the fact that they are a more responsive tire generally than the PSS.

?
yes, there is no way around this. if these feel "good", imo its placebo and partially due to the stiffer tire in the ad08r. but the ad08r in stock sizes would perform much much better

plus the wider tire doesn't do much for grip if the contact patch is mostly determined by the wheel width, which it is.

anyway, to each their own, OP and glad you are happy
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      10-03-2014, 12:38 PM   #19
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Whoa'', a 275 on a 9 rim,, ( that's beyond the max ,'' I hope its still safe..
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      10-03-2014, 12:42 PM   #20
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Quote:
Originally Posted by Mere View Post
Whoa'', a 275 on a 9 rim,, ( that's beyond the max ,'' I hope its still safe..
Actually it is not outside the recommended wheel width. Yokohama states 9" is the lower end of the accepted range. Perfectly safe... whether it is ideal is to be determined.
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      10-03-2014, 12:48 PM   #21
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Quote:
Originally Posted by dmk08 View Post
Yeh IMO the wheel/tire size vs amount of stock torque is the worst part of the new car. I guess they stayed with the installed sizes for ride quality or something.
Wider tires cause more tramlining and less responsive feel as a general rule. Most M buyers would complain about this on a daily driver car. That's my guess... it's a compromise based on how most owners will use their car as you don't really need more tire for the daily drive.
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      10-03-2014, 01:09 PM   #22
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So there's no rubbing when doing a full left or right turn and they fit fine on stock rims? That's awesome! any pics of the rear where the tires can be seen closely? I want to see how wide it looks. I want to get 305's in the back eventually.
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