[ebisu8]

Originally Posted by juicy

Do you believe 18*10.5+37 in the rear with 295/30 will fit?

Yes. I don't know which tire you're planning on but some are more fitment friendly than others.

[juicy]

Originally Posted by ebisu8

Yes. I don't know which tire you're planning on but some are more fitment friendly than others.

I'm going for A052 or R888. I have heard that they both run wide.

[ebisu8]

Originally Posted by juicy

I'm going for A052 or R888. I have heard that they both run wide.

Ya you should be fine. Ride height and negative camber will help. I too plan on trying out a 10.5 et37 RIA square setup at some point next year.

[juicy]

Originally Posted by ebisu8

Ya you should be fine. Ride height and negative camber will help. I too plan on trying out a 10.5 et37 RIA square setup at some point next year.

Will post pics once I got it done. Thanks

[Gusman1]

So which tire size safest bet on 10.5" wheel with 37 offset, 295/30/18 or 295/35/18 A052?

Tire racks specs says the A052 295/35 is narrower 11" thread width vs 295/30s 11.2" thread width.

I think only other option in the A052 tire is 255/40 & 275/40

[ZM2]

Originally Posted by Gusman1

So which tire size safest bet on 10.5" wheel with 37 offset, 295/30/18 or 295/35/18 A052?

Tire racks specs says the A052 295/35 is narrower 11" thread width vs 295/30s 11.2" thread width.

I think only other option in the A052 tire is 255/40 & 275/40

That's a tough call b/c when you're running that wide and offset <40mm, both width and height become an issue with the fender, especially if you're lowered.

I haven't tried this exact fitment, but if I had to coin flip I'd say go 295/30 b/c 1 inch less diameter will have more clearance impact than 0.1" further outboard from the tire width. Maybe someone who's tried these specs can chime in.

I'll end up trying 265/295/35/18 on mine, but I'm ET40, only lowered 3/4", and have trimmed the fender tabs. I still expect the 295/35 in the back to be very tight with my setup.

[bentom2]

Originally Posted by Gusman1

So which tire size safest bet on 10.5" wheel with 37 offset, 295/30/18 or 295/35/18 A052?

Tire racks specs says the A052 295/35 is narrower 11" thread width vs 295/30s 11.2" thread width.

I think only other option in the A052 tire is 255/40 & 275/40

I got some liner rub in the back through deep compressions with the A052 in 275/40/18 on an 18x10.5 et40 wheel with ohlins set to recommended drop (10-15mm?). Probably not enough to stop me from running them again, but I’m not sure whether the 3mm offset difference would make a notable difference.

I’ll probably try 295 in 30 series next year after i experiment with a couple other tires that are not max width attempts.

Hankook RS4 in 265/35 and 285/35 fit perfect. I wish more tires came in that size combo.

[SEAT TIME RULES]

Originally Posted by Gusman1

So which tire size safest bet on 10.5" wheel with 37 offset, 295/30/18 or 295/35/18 A052?

Tire racks specs says the A052 295/35 is narrower 11" thread width vs 295/30s 11.2" thread width.

I think only other option in the A052 tire is 255/40 & 275/40

Gus, I responded to your PM as well.

I've got the 295/35 Yoko's on my rear Apex 10" rims.

Under full compression the rears will rub on the inside fender walls.

I'll either be switching to the 295/30's on my next set, or just go nuts and squeeze the NT01's under there.
275/35 & 305/35's......

[Gusman1]

Originally Posted by ZM2

That's a tough call b/c when you're running that wide and offset <40mm, both width and height become an issue with the fender, especially if you're lowered.

I haven't tried this exact fitment, but if I had to coin flip I'd say go 295/30 b/c 1 inch less diameter will have more clearance impact than 0.1" further outboard from the tire width. Maybe someone who's tried these specs can chime in.

I'll end up trying 265/295/35/18 on mine, but I'm ET40, only lowered 3/4", and have trimmed the fender tabs. I still expect the 295/35 in the back to be very tight with my setup.

I'm lowered at 590mm all around right now but have no problem adjusting the height to fit the 295s.

Yeah was leaning towards the 295/35 because it's very close to oem diameter but seems like it might be too much sidewall.

I'll have to look at those fender tabs as well.

[Gusman1]

Originally Posted by bentom2

I got some liner rub in the back through deep compressions with the A052 in 275/40/18 on an 18x10.5 et40 wheel with ohlins set to recommended drop (10-15mm?). Probably not enough to stop me from running them again, but I’m not sure whether the 3mm offset difference would make a notable difference.

I’ll probably try 295 in 30 series next year after i experiment with a couple other tires that are not max width attempts.

Hankook RS4 in 265/35 and 285/35 fit perfect. I wish more tires came in that size combo.

It appears that the closer to get to oem diameter the more likely you are to rub a little bit.

Hear good things about those RS4, where do you find those? Didn't see them listen on tire rack.

[Gusman1]

Originally Posted by SEAT TIME RULES

Gus, I responded to your PM as well.

I've got the 295/35 Yoko's on my rear Apex 10" rims.

Under full compression the rears will rub on the inside fender walls.

I'll either be switching to the 295/30's on my next set, or just go nuts and squeeze the NT01's under there.
275/35 & 305/35's......

I tried to reply but your inbox full.

[bentom2]

Originally Posted by Gusman1

It appears that the closer to get to oem diameter the more likely you are to rub a little bit.

Hear good things about those RS4, where do you find those? Didn't see them listen on tire rack.

Yeah, seems like you need to reduce OD when you increase width to keep rubbing to a minimum.

RS4 seems to be stocked up 1x per year in the US, around April, then they sell out and get delisted, so slim pickings right now. At least that’s what happened the last two years that I personally observed.

The A052 and RS4 are much different tires though. RS4 is great if you want durability and longevity at the expense of wet and dry grip. They also break away more suddenly if you exceed their limits. But they’ll heat cycle out most of the time before they cord.

A052 had tons of grip, wet or dry, but only last a few days. A052 was around 3 seconds faster for me on my local 1:40-2:00 tracks, but life is probably half. That was 255/275 a052 vs 265/285 RS4.

[Kelse92]

RS4 can be had year-round at HankookMotorsports.com they do charge for shipping so it increases the cost. But they do exist. Just not at the usual sources. A lot of people don’t realize this.

No one thinking about going for the Falken Rt660 in here?

[Gusman1]

Originally Posted by bentom2

Yeah, seems like you need to reduce OD when you increase width to keep rubbing to a minimum.

RS4 seems to be stocked up 1x per year in the US, around April, then they sell out and get delisted, so slim pickings right now. At least that’s what happened the last two years that I personally observed.

The A052 and RS4 are much different tires though. RS4 is great if you want durability and longevity at the expense of wet and dry grip. They also break away more suddenly if you exceed their limits. But they’ll heat cycle out most of the time before they cord.

A052 had tons of grip, wet or dry, but only last a few days. A052 was around 3 seconds faster for me on my local 1:40-2:00 tracks, but life is probably half. That was 255/275 a052 vs 265/285 RS4.

Noted. Sucks there isn't any more 285/35/18 200tw tire options.

[slicer]

Originally Posted by Gusman1

So which tire size safest bet on 10.5" wheel with 37 offset, 295/30/18 or 295/35/18 A052?

Tire racks specs says the A052 295/35 is narrower 11" thread width vs 295/30s 11.2" thread width.

I think only other option in the A052 tire is 255/40 & 275/40

Absolutely the opposite. I tested both the 295/35 and 295/30 A052 and found that the 295-35/18 was 12mm+ wider

[TUNEDM3]

I would love to get a little more meat under the car for track work. Its very under tired. I have a set of 19x9.5 et25 and 19x10.5 et40. Car is lowered and am running about -2.8 front and -2.0 rear camber. Currently running 255/275. 18's are out of the question because of the brakes. Any idea if a 265/295 combo would work with those offsets and camber settings?

[bentom2]

Originally Posted by Kelse92

RS4 can be had year-round at HankookMotorsports.com they do charge for shipping so it increases the cost. But they do exist. Just not at the usual sources. A lot of people don’t realize this.

No one thinking about going for the Falken Rt660 in here?

Good to know there’s another option year round. Thanks.

RT660 is probably the tire I’ll try next, but not offered in ideal sizes for 18s. I’ll probably try them in 265/35 and 285/30. Not sure how wide they run, but there might be an option here for 19s relevant to this thread-275/30f and 305/30r. Rear will be a tight squeeze though unless these happen to run narrow.

[ZM2]

Originally Posted by TUNEDM3

I would love to get a little more meat under the car for track work. Its very under tired. I have a set of 19x9.5 et25 and 19x10.5 et40. Car is lowered and am running about -2.8 front and -2.0 rear camber. Currently running 255/275. 18's are out of the question because of the brakes. Any idea if a 265/295 combo would work with those offsets and camber settings?

If 265/30 & 295/30, it’ll be close but should work.

[TUNEDM3]

Originally Posted by ZM2

If 265/30 & 295/30, it’ll be close but should work.

Thank you

[ZM2]

Originally Posted by TUNEDM3

Thank you

Np, more details and a pic link to compare my previous setup with yours in post #259.

[Gusman1]

Originally Posted by slicer

Absolutely the opposite. I tested both the 295/35 and 295/30 A052 and found that the 295-35/18 was 12mm+ wider

Oh damn that's a lot. Any feedback or issues with the 295/30?

[nando_514]

Originally Posted by ZM2

Hey guys.

I have a conversation going with Apex (http://f87.bimmerpost.com/forums/sho...5#post22760045), but I wanted to open it up to everyone.

Most of us are a little lowered and are running negative camber. This limits us to about 275/35/18 in the front, but I should be able to get a 285/30 or 295/30 to fit in the back with their new FL-5 10.5” wheel. Have any of you guys ran these combos on this or other cars?

I’m trying to figure out if the gain in rear rubber is offset by negative impacts to handling or the way the differential works. This isn’t a square/stagger question, but a wider/lower diameter rear vs front question.

The reason I’m looking at these sizes is bc these are the RE-71R and R7 sizes in this range.

Thanks.

------------------------------
Quick update:

I ran 265/35/19 & 295/30/19 Hoosier R7s on the car at an open track day last week. I believe this is the Max Rubber you can get on a track prepped M2 with camber and lowered suspension!

I originally tried 295/35/19 R7s in the rear, but they were too tall and had to go 295/30s. They don't make 265/30 R7s, but the balance was still good front to rear and there was tons of grip and it was a blast!

The 265/30/19 & 295/30/19 Trofeo R setup I tried on track were great, as well. For cheaper tires, I think I can fit a 305/30/19 RE-71R in the back, but I probably won't try that until next year.

You can find my suspension and wheel specs in the thread if you're trying to figure this out, as well.

———————————————-

Latest update:

On my 19” track setup that I used for the last two years I ran Trofeo’s, Cup 2, R888R, RE-71R, and R7s, and was able to run 265/30-35 in the front and 295-305/30 in the rear.

I am going back to 18s so I can run NT01, AR1, A052, Toyo RR, and Pirelli slicks.

Crazy thing is going to the forged EC-7 18’s with A052’s will save 30lbs of rotational unsprung weight, vs my 19” VMR’s (1/2lb heavier per wheel than 19” EC-7) and RE-71Rs.

The wheel/tires I’m comparing for my setup are VMR 710FF 19x9.5 ET33 (with 3mm spacer) and 19x10.5 ET45 with 265/35/19 and 305/30/19 RE-71R’s, vs Apex Forged EC-7 18x10 ET25 and 18x10.5 ET40 with 265/35/18 and 295/35/18 A052’s.

Four width size differences was too much for good balance, but 2-3 width difference has been good in my other staggered setups, so looking forward to 265/295 and 275/295-305 with the 18’s.

I just need to make sure a 305/35/18 will clear with ET40 and lowered 3/4” in the rear. It’ll be a while before I test it bc of all the track events being shut down, but I’ll post an update when I do.

Thanks for continually updating this thread OP! I'm new here and this was super helpful. I plan on heading to Lime Rock and NJMP several times this year on PS4S and RE71s