What Size PSS for OEM 19" Wheels?

[CanAutM3]

I have just gotten the 265/35R19 M0 spec PSS installed in the front.

I just came back from 2 track days at LCMT in semi-dry semi-wet (including snow ) conditions. So I mostly lapped with the PSS on the car. This exhausted whatever life was remaining on my front 275/35R19 PSS (the original rears). Interestingly, they corded on the inside first. I had already observed the inner shoulder wearing faster. Maybe this comes from the fact that these are intended as rear tires and have a squarer contact patch .

First observation from the 265 is the the longitudinal channels in the tread are much wider than the 275/35R19 BMW star spec I had up front. This should reduce the increased aquaplaning sensitivity I had with the 275. The tire is also quite meaty, filling the fenders well. First impression from the short drive from the shop to my house is that there is less feedback coming through the steering wheel compared to the 275, I however cannot recall how it felt with the OE 255 though. There is also much less tram-lining going on, which is a good thing.

I will wait for the tires to break-in before posting a more substantial review.

[aboulfad]

where did u buy and install them? Prix?

[CanAutM3]

Originally Posted by aboulfad

where did u buy and install them? Prix?

Pneu Expert in Longueuil. $349ea.

[farbmw]

CanAutM3 any pics of the set up?

[aboulfad]

Originally Posted by CanAutM3

Pneu Expert in Longueuil. $349ea.

Thanks. Do they have the hunter force machine or just standard balancing machine? I don't trust VAG Auto as the winter set I had wasn't perfectly balanced so I am looking for a better place.

[CanAutM3]

Originally Posted by aboulfad

Thanks. Do they have the hunter force machine or just standard balancing machine? I don't trust VAG Auto as the winter set I had wasn't perfectly balanced so I am looking for a better place.

They only have a standard balancing machine, but I never had vibrations from their installs.

IIRC, the hunter force machine would help to cure a car that pulls to one side, but shouldn't affect vibrations...

[aboulfad]

Originally Posted by CanAutM3

They only have a standard balancing machine, but I never had vibrations from their installs.

IIRC, the hunter force machine would help to cure a car that pulls to one side, but shouldn't affect vibrations...

OT: Don't know as much as you on tires but the hunter force has many modes, one of them is road force matching and the other is smart weight which both lead to a better more accurate balancing. Most of my research and reading has led me to believe that if you tradionnally balance a new tire few times and still has vibration issues (assuming no suspension issues), then RF is the next course of action.

But when it comes to changing my tires, I trust that you are quite content with that shop and will visit them! Thanks for the info.

[CAOZKAN]

Originally Posted by CanAutM3

The problem with the 265/40R19 is that they are taller than the rear 295/35R19, thus reversing the diameter stagger ratio which in turn will through off the DSC/MDM calibration. Further, the sidewalls of the 265/40 will also be significantly taller than the 265/35 thus potentially yielding a more sluggish steering response. I would still be more inclined of going with the 265/35R19 M0 spec from the AMG GT-S paired with the 295/35R19 star spec from the M5.

Okay I bought 295 35 19 PSS(star spec) and they are at very good condition.(6.5mm tread) Now I'm trying to find good fronts, since my old rear tires are put to front and they are almost gone. I found psc2 265 35 19. Do you think it would be a good idea to mix&match different tires? I mean in ideal world I know it's not the best idea but the Trackdays are killing the tires so fast that's why I don't want to spend too much since I'm not a professional or something.. I think they will be better for sure then using old rears, what do you think?

[CanAutM3]

Originally Posted by CAOZKAN

Okay I bought 295 35 19 PSS(star spec) and they are at very good condition.(6.5mm tread) Now I'm trying to find good fronts, since my old rear tires are put to front and they are almost gone. I found psc2 265 35 19. Do you think it would be a good idea to mix&match different tires? I mean in ideal world I know it's not the best idea but the Trackdays are killing the tires so fast that's why I don't want to spend too much since I'm not a professional or something.. I think they will be better for sure then using old rears, what do you think?

I would definitely NOT recommend going with an R-comp on one axle and a street tire on the other. This will seriously alter the overall handling balance of the car.

[CanAutM3]

Originally Posted by Mark's M

Thanks and no worries. Here's a pic of the OEM's with the MO1 265's for comparison thus far. I posted this in the other threat but SROC didn't post a pic of his MO's. Difference in water channel widths is as follows (from left to right)

OEM(not mounted) - 1.5mm, 15mm, 15mm, 15mm (the larger channels look different in the pics but measured the same)
MO1 (mounted) - 6mm, 11mm, 13mm, 12mm ( ditto above)

Thanks to MarksM, we now have a better understanding of the difference between the M0 and M01 spec 265/35R19. The M0 have much larger longitudinal grooves for better water evacuation. Which is consistent with a front tire. However, combined with a slightly narrower tread width, this translates to less rubber on the road.

The measurement in blue from my freshly mounted M0 compared to the ones from Mark's M. I also added tread width as measured by TireRack in inches and extrapolated "rubber on the road" width. The latter is highly un-scientific and should be used as a ballpark figure only.

OEM(not mounted) 8.5" - 1.5mm, 15mm, 15mm, 15mm = 169mm
M01 (mounted) 9.4" - 6mm, 11mm, 13mm, 12mm = 197mm
M0 (mounted) 9.3" - 3mm, 16mm, 18mm, 18mm = 181mm

Pictures:

1. 265/35R19 M0 sidewall marking
2. 265/35R19 M0 tread pattern
3. 255/35R19 * / 265/35R19 M01 tread pattern (courtesy of Mark's M)

[CAOZKAN]

Originally Posted by CanAutM3

I would definitely NOT recommend going with an R-comp on one axle and a street tire on the other. This will seriously alter the overall handling balance of the car.

I already did that, trofeo r in the rear and pss in the front ended up killing the fronts in one day but since the R compound tires will be in the front and the rears are already wider pss, I was thinking it won't be a big of a problem but you got me thinking

[Mark's M]

Originally Posted by CanAutM3

Thanks to , we now have a better understanding of the difference between the M0 and M01 spec 265/35R19. The M0 have much larger longitudinal grooves for better water evacuation. Which is consistent with a front tire. However, combined with a slightly narrower tread width, this translates to less rubber on the road.

The measurement in blue from my freshly mounted M0 compared to the ones from Mark's M. I also added tread width as measured by TireRack in inches and extrapolated "rubber on the road" width. The latter is highly un-scientific and should be used as a ballpark figure only.

OEM(not mounted) 8.5" - 1.5mm, 15mm, 15mm, 15mm = 169mm
M01 (mounted) 9.4" - 6mm, 11mm, 13mm, 12mm = 198mm
M0 (mounted) 9.3" - 3mm, 16mm, 18mm, 18mm = 181mm

Thanks CanAut, really interesting info (and tks for the fixes from the other thread). Had a fairly warm day finally and I was out on some back roads with MDM on and TC completely off for a bit. While not the best place to push the limits, I was amazed at how difficult it was to break straight line traction with these 295's. Night and day really when compared to the OEM 275's. Had to be respectful of the road widths where I was so it wasn't a 10/10ths venture by any means so I'm on a quest to find some better "private" space to feel out the limits before track time next month.

[SteveSuk]

http://www.camskill.co.uk/m55b0s7616..._Noise%3A_73dB

So these for the rear? (UK site )

[A47]

Originally Posted by CanAutM3

Thanks to , we now have a better understanding of the difference between the M0 and M01 spec 265/35R19. The M0 have much larger longitudinal grooves for better water evacuation. Which is consistent with a front tire. However, combined with a slightly narrower tread width, this translates to less rubber on the road.

The measurement in blue from my freshly mounted M0 compared to the ones from Mark's M. I also added tread width as measured by TireRack in inches and extrapolated "rubber on the road" width. The latter is highly un-scientific and should be used as a ballpark figure only.

OEM(not mounted) 8.5" - 1.5mm, 15mm, 15mm, 15mm = 169mm
M01 (mounted) 9.4" - 6mm, 11mm, 13mm, 12mm = 198mm
M0 (mounted) 9.3" - 3mm, 16mm, 18mm, 18mm = 181mm

Pictures:

1. 265/35R19 M0 sidewall marking
2. 265/35R19 M0 tread pattern
3. 255/35R19 * / 265/35R19 M01 tread pattern (courtesy of Mark's M)

Given the wider tread of the generic 255,I would be surprised if they don't have as much tread as some 265s.Also how much tread does the BMW 275 actually have?

[CanAutM3]

Originally Posted by A47

Given the wider tread of the generic 255,I would be surprised if they don't have as much tread as some 265s.Also how much tread does the BMW 275 actually have?

All the info is in the OP .

The tread of the generic 255 is almost as wide (9.2") as the 265 M0 spec (9.3"). However, I find the diameter a bit smallish to be paired with a rear 295.

The 275 BMW spec has a 9.5" tread, but is not ideal when used as a front tire.

The generic 255 would match great with the generic 275. I had this combo on my E92 and loved it .

[Jaymax85]

i took the leap

295/35/19 star spec with 265/35/19 mo spec ordered

i thank everyone for their contributions

[CanAutM3]

Originally Posted by HELLOimJ

i took the leap

295/35/19 star spec with 265/35/19 mo spec ordered

i thank everyone for their contributions

You won't be disappointed . I love this combo .

[Jaymax85]

Originally Posted by HELLOimJ

i took the leap

295/35/19 star spec with 265/35/19 mo spec ordered

i thank everyone for their contributions

update on this; I am lowered on swift spec R

295/35/19 fit without a hitch, even was able to put my 12mm spacers on for a perfect flush look

265/35/19- not so great fit, the taller tire looks tucked, and I was unable to put my 15mm spacer up front because the taller tire rubbed the fender lining when the wheel was turned.

The car feels great though, TONS of grip, really like how the car feels.

I am thinking of trying a 5-10mm spacer just to get the tire closer to the fender wall. I will post pictures later to illustrate my point;

If I have further rubbing issues I am wondering if i should go back to 255/35/19 up front.... i am wondering how adverse of an effect that would have on handling..

[Jaymax85]

Pics

[CanAutM3]

Originally Posted by HELLOimJ

update on this; I am lowered on swift spec R

295/35/19 fit without a hitch, even was able to put my 12mm spacers on for a perfect flush look

265/35/19- not so great fit, the taller tire looks tucked, and I was unable to put my 15mm spacer up front because the taller tire rubbed the fender lining when the wheel was turned.

The car feels great though, TONS of grip, really like how the car feels.

I am thinking of trying a 5-10mm spacer just to get the tire closer to the fender wall. I will post pictures later to illustrate my point;

If I have further rubbing issues I am wondering if i should go back to 255/35/19 up front.... i am wondering how adverse of an effect that would have on handling..

I tried 12mm in front with the 265/35R19 and had a significant interference when the wheels were steered, not just a rub. Note that it is a combination of the wider tread with the taller tire that causes this. 5mm fits just fine with no rubbing. I reckon 8mm would work but 10mm might be too much. Let us know if you try it out.

[Jaymax85]

Originally Posted by CanAutM3

I tried 12mm in front with the 265/35R19 and had a significant interference when the wheels were steered, not just a rub. Note that it is a combination of the wider tread with the taller tire that causes this. 5mm fits just fine with no rubbing. I reckon 8mm would work but 10mm might be too much. Let us know if you try it out.

probably in the next few weeks I will try a 5mm/10mm and report back

[g2g8969]

sorry to bump a thread
but consensus is that the 265/35/19 M0 tire won't fit with lowered and 15 mm spacers up front correct? However the 295/35/19 does fit rears with 12mm

Any good front tire that can fit with spacers? or just use the stock 255?