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[flea333]

Been reading around the forums to figure out what tires are best for stock zcp replacement. I understand the whole same stagger concept of the 255/35 275/35, but if I'm going to pay to replace the tires, I really want to get it thick and fat in the back. That's my main interest, max traction.

I see success with people using 295/30 which is a nice tires size, plus the PSS's come in that size. I'm thinking of just replacing my rears with PSS 295/30's since it also is a closer stagger to the OEM than 255/35 F.

What is the reason people care about increasing the fronts by half an inch anyway? Any other issues with drivability people might see with the 245/35 F, 295/30 R?

[Need4Speed_Motorsports]

My recommendation would be the PSS hands down. If you want to go with the 295/30 then I would do it fast since stock of that tire is extremely low and can go on backorder any day now.

[slicer]

Increasing stagger = increasing understeer.

Understeer sucks.

It's always best to match the wheel width to a corresponding tire width. 295's will work on 10" wheels but not as well as they would on 10.5" or 11" wheels. 275's are pretty much perfect for the 10" rear wheels.

[Someone?]

I did 275/255 PSS on my Blackchrome ZCP's, PERFECT, i personally wouldn't go any bigger. This was before i cleaned the brand new tires.

[flea333]

Originally Posted by slicer

Increasing stagger = increasing understeer.

Understeer sucks.

It's always best to match the wheel width to a corresponding tire width. 295's will work on 10" wheels but not as well as they would on 10.5" or 11" wheels. 275's are pretty much perfect for the 10" rear wheels.

what about decreasing stagger? also by stagger, I presume you mean tire diameter and not width?

[slicer]

Originally Posted by flea333

what about decreasing stagger? also by stagger, I presume you mean tire diameter and not width?

Stagger refers to tire width. Decreasing it makes the car have more neutral handling. OEM stagger is 20mm. You are proposing 40 or 50mm which effectively increases grip in the rear relative to the front. When you turn hard into a corner you will have more a propensity for understeer due to the reduction in front grip (relative to the rear). Google understeer.

[smmmurf]

Having just driven the Yoko AD08R on the street/track in dry/wet I like the breakaway and steering response on those better than PSS. They are firmer over bumps and cracks in the road (not that much worse) but in return you get a tire that responds sharper than the PSS. Around the same wet grip (slightly worse laterally but better on braking and accel). A bit expensive but worth the money IMO.

They run wide so you'll be more than satisfied with 255/275 on your ZCP. Talk to Performance Technic in Pleasanton, they mounted mine up on an E36 track car.

[Hujan]

Slicer, you really need to put the case for 255/275 on ZCP wheels in your sig. The question comes up all too often and you are always the voice of reason.

[flea333]

Originally Posted by slicer

Stagger refers to tire width. Decreasing it makes the car have more neutral handling. OEM stagger is 20mm. You are proposing 40 or 50mm which effectively increases grip in the rear relative to the front. When you turn hard into a corner you will have more a propensity for understeer due to the reduction in front grip (relative to the rear). Google understeer.

Yes, I finally get it. I experienced understeer around a sharp on ramp with a rental 1 series, I couldn't get grip and almost flew off the corner. Scary.

definitely don't want that.

I also was told by a rim repair guy that thicker tires destroy gas mileage. He said a guy with my M3 had super fat tires and they killed his mpg so he's goign back to stock. That makes me think looking good might not be biggest priority and 275's should be good.

[Hujan]

Originally Posted by flea333

Yes, I finally get it. I experienced understeer around a sharp on ramp with a rental 1 series, I couldn't get grip and almost flew off the corner. Scary.

definitely don't want that.

I also was told by a rim repair guy that thicker tires destroy gas mileage. He said a guy with my M3 had super fat tires and they killed his mpg so he's goign back to stock. That makes me think looking good might not be biggest priority and 275's should be good.

Generally speaking, the wider the tires, the more rolling resistance. The more rolling resistance, the lower the MPG. But you're in the wrong car for MPG.

[flea333]

Originally Posted by Hujan

Generally speaking, the wider the tires, the more rolling resistance. The more rolling resistance, the lower the MPG. But you're in the wrong car for MPG.

Yes, I just wasn't sure if it was ridiculous like 11mpg instead of 15. I get 15.8 now. I just want a good balance with performance without making it way worse.

Also, based on another post, I'm really liking the idea of 275/30 F, 295/30 R PSS's.

[momo3605]

Also running 255/275 on stock ZCP rims. Perfect fitment. Like everyone has said above, 295 is too wide for a 10 inch wheel and your tire will roll on hard turns.

[Dave07997S]

Originally Posted by flea333

Yes, I finally get it. I experienced understeer around a sharp on ramp with a rental 1 series, I couldn't get grip and almost flew off the corner. Scary.

definitely don't want that.

I also was told by a rim repair guy that thicker tires destroy gas mileage. He said a guy with my M3 had super fat tires and they killed his mpg so he's goign back to stock. That makes me think looking good might not be biggest priority and 275's should be good.

I am running the GTS sizes of 255/285 setup and if their was a drop in mileage it was minimal.

Dave

[flea333]

Originally Posted by Dave07997S

I am running the GTS sizes of 255/285 setup and if their was a drop in mileage it was minimal.

Dave

I would also do this if the PSS's came in that size, 285/30. What are you running?

[Dave07997S]

Originally Posted by flea333

I would also do this if the PSS's came in that size, 285/30. What are you running?

I am currently running the ToyoT1Sport, found it to be a very good tire. I thought I would give them a try and actually have been quite pleased. However, if I was to do it again I would go back to the Continental Contisportcontact 5Ps in the GTS sizes. Had these on my 2011 M3 and they are an excellent tire, right up there with the Mich. PSS., more expensive though.

Dave

[flea333]

Originally Posted by momo3605

Also running 255/275 on stock ZCP rims. Perfect fitment. Like everyone has said above, 295 is too wide for a 10 inch wheel and your tire will roll on hard turns.

Even though the tire is a shorter tire? Seems like there would be some offset there by the shorter. I'm more worried about goign straight up to 275/35 which will definitely increase roll. The overall diameter of both 285/30 and 295/30 are lower than the 275/35.

[momo3605]

Originally Posted by flea333

Even though the tire is a shorter tire? Seems like there would be some offset there by the shorter. I'm more worried about goign straight up to 275/35 which will definitely increase roll. The overall diameter of both 285/30 and 295/30 are lower than the 275/35.

Yea, that's true, it is a slightly taller tire, but at 275, it still has just a bit of stretch on the 10 inch rim. I have another car that is running 255/35s on an 8.5 inch rim which is equivalent to 285 on a 10 and you can actually see the edge of the tire shows roll. 295 would be even wider!

[flea333]

Comparing the 3 tire sizes, you'll see that the 285/30 measured rim widtch is dead on 10", matching the ZCP size. Problem is PSS's don't come in that size. Dang, looks like I'm stuck with 275s.

$1094
255/35ZR19
(96Y)XL
300 AA A
1565 lbs. 50 psi 10/32" 24 lbs. 8.5-10" 9" 10.2" 9.2" 26" 799 US , FR

275/35ZR19
(100Y)XL
300 AA A
1764 lbs. 50 psi 10/32" 27 lbs. 9-11" 9.5" 10.9" 10.2" 26.6" 783 FR

$1194
275/30ZR19
(96Y)XL
300 AA A
1565 lbs. 50 psi 10/32" 26 lbs. 9-10" 9.5" 10.9" 10.2" 25.6" 814 FR

295/30ZR19
(100Y)XL
300 AA A
1764 lbs. 50 psi 10/32" 28 lbs. 10-11" 10.5" 11.9" 11.5" 26" 799 FR

$1376
255/35ZR19
96YXLMercedes, Front/Both Axles
240 AA A
1565 lbs. 51 psi 10/32" 23 lbs. 8.5-10" 9" 10.4" 9.1" 26" 799 CZ

285/30R19
98YXLMercedes, Front/Both Axles
240 AA A
1654 lbs. 51 psi 10/32" 28 lbs. 9.5-10.5" 10" 11.4" 11.1" 25.7" 808 CZ

[momo3605]

Originally Posted by flea333

Comparing the 3 tire sizes, you'll see that the 285/30 measured rim widtch is dead on 10", matching the ZCP size. Problem is PSS's don't come in that size. Dang, looks like I'm stuck with 275s.

255/35ZR19
(96Y)XL
300 AA A
1565 lbs. 50 psi 10/32" 24 lbs. 8.5-10" 9" 10.2" 9.2" 26" 799 US , FR

275/35ZR19
(100Y)XL
300 AA A
1764 lbs. 50 psi 10/32" 27 lbs. 9-11" 9.5" 10.9" 10.2" 26.6" 783 FR



275/30ZR19
(96Y)XL
300 AA A
1565 lbs. 50 psi 10/32" 26 lbs. 9-10" 9.5" 10.9" 10.2" 25.6" 814 FR

295/30ZR19
(100Y)XL
300 AA A
1764 lbs. 50 psi 10/32" 28 lbs. 10-11" 10.5" 11.9" 11.5" 26" 799 FR


255/35ZR19
96YXLMercedes, Front/Both Axles
240 AA A
1565 lbs. 51 psi 10/32" 23 lbs. 8.5-10" 9" 10.4" 9.1" 26" 799 CZ

285/30R19
98YXLMercedes, Front/Both Axles
240 AA A
1654 lbs. 51 psi 10/32" 28 lbs. 9.5-10.5" 10" 11.4" 11.1" 25.7" 808 CZ

Lol, yea I also wanted to do 285/30 but PSS don't offer that size and I hear it looks a little funny since it's much shorter than stock. while the front is a bit bigger than stock.

[flea333]

Originally Posted by momo3605

Lol, yea I also wanted to do 285/30 but PSS don't offer that size and I hear it looks a little funny since it's much shorter than stock. while the front is a bit bigger than stock.

Continential 5P's are a good option. I saw a pic on a thread of that combo and it looked great to me.
http://www.m3post.com/forums/showpos...94&postcount=6

I'm gonig to be economical and stick with 255/275 combo. If I wear these out next time I'll go with Continential maybe if I find I could use more tread.

[Dave07997S]

Originally Posted by flea333

Continential 5P's are a good option. I saw a pic on a thread of that combo and it looked great to me.
http://www.m3post.com/forums/showpos...94&postcount=6

I'm gonig to be economical and stick with 255/275 combo. If I wear these out next time I'll go with Continential maybe if I find I could use more tread.

That is my 2011 M3 with a set of Nitto Invos in the GTS sizes. Heres a pic of the same car with the Contis..





Toyo T1Sport..my 2013 also GTS sizes.





Dave

[kawasaki00]

Originally Posted by Dave07997S

That is my 2011 M3 with a set of Nitto Invos in the GTS sizes. Heres a pic of the same car with the Contis..





Toyo T1Sport..my 2013 also GTS sizes.


Dave

What tire did you like best of the 285 flavor?