[shwayne5]

Anyone try running these?

https://www.racewerkz.com/products/f...e-19-wheel-set

It looks like they’ve done the R&D for fitment and require small spacer, but they don’t specify exact size.

[Mapper]

It's interesting the supercsr 3rs wont fit when specs if the nankang on paper give the same size section 12.3" measurements using a 11 inch aa the supercar 3rs. Supercar have rim guard and high lettering or is one wrong on the spec sheet?

[Forzanerazzurri]

Originally Posted by BulkBen

Quick update.

I finally hit the track with this setup and all seems fine - certainly no clearance issues.
The AR-1’s are renowned for requiring bedding in, so after the morning on street tyres I only gave them two quick sessions before packing up.
In a few weeks I’ll be back out having fun them for a proper day.

Nothing really to report apart from the obvious that they’re much noisier and feel heavier in the steering vs the 4S, I consider the feel a good thing. Those who’ve driven with big, flat track tyres will know what I mean.

I do have sone other observations though, not tyre related.

On the track 4WD is much better than 4WD sport.
I tried this for the first time on the 4S’s and the car became much more taily, really lacked stability vs normal 4WD mode.

Secondly, for those trying to get away with the 4S on the track, be careful.
I thought mine looked relatively unscathed after my first putting a few months back, however they quickly disintegrated this time out with a front delaminating.

They absolutely won’t hold up for multiple track days unless you’re a novice. They’re a great street tyre but a big heavy car like the G80 driven in anger will shred them.

The PS4S delaminating on the track is not a surprise to me. They are Michelins, it's their signature feature. Those tires are junk.

[Hit_Apex]

Originally Posted by fl1by

Did you ever get to running the 305s? If not what are you running?

I'm still on stock wheels but will be trying 19x11 305 square in a few weeks. I want to run the SC3R which I'm told fit like a 320 - so still not sure about the front. This setup assumes you have coilovers/camber plates at the least, and possibly front castor adjustment (ie SPL links).

[Mapper]

SC3R on a 11 wide wheel will have a section width of 313mm plus any raised lettering.

This does raise the question I have to the OP whereas they say SC3R was never gunna happen using a 10.5 wheel which brings the section width to 308mm. Yet apex wheels has no problem fitting while having NT01s 305 35 18s that happen to also be 308mm. I would be curious where the interference is.

I plan to run 10.5x19 all four corners and would like to know why not all 305 30 19 tyre fit. Apex can do it with a 0.2" taller setup, so why cant 19s

[Blk5er33]

Originally Posted by Mapper

SC3R on a 11 wide wheel will have a section width of 313mm plus any raised lettering.

This does raise the question I have to the OP whereas they say SC3R was never gunna happen using a 10.5 wheel which brings the section width to 308mm. Yet apex wheels has no problem fitting while having NT01s 305 35 18s that happen to also be 308mm. I would be curious where the interference is.

I plan to run 10.5x19 all four corners and would like to know why not all 305 30 19 tyre fit. Apex can do it with a 0.2" taller setup, so why cant 19s

I was also wondering why Apex listed 305's on the 18's only. Maybe they are a little shorter so they're stretched on the wheel more? Maybe the NT01 "runs narrow". Is the section width reliable considering people say that SC3R "run wide"? Does that mean the true section width is greater?
I went through all of this myself and almost pulled the trigger on the 10.5 X 19 wheels, but then just decided to stay on the OEM wheels, because you're really just getting a little extra width up front. Plus even if you do rotate your rear wheels to the front, you still may only get about 20-25 heat cycles out of them = about 4-5 track days. This can also be done with the OEM setup by rotating the wheels side to side.

[Mapper]

Originally Posted by Blk5er33

I was also wondering why Apex listed 305's on the 18's only. Maybe they are a little shorter so they're stretched on the wheel more? Maybe the NT01 "runs narrow". Is the section width reliable considering people say that SC3R "run wide"? Does that mean the true section width is greater?
I went through all of this myself and almost pulled the trigger on the 10.5 X 19 wheels, but then just decided to stay on the OEM wheels, because you're really just getting a little extra width up front. Plus even if you do rotate your rear wheels to the front, you still may only get about 20-25 heat cycles out of them = about 4-5 track days. This can also be done with the OEM setup by rotating the wheels side to side.

All very good points.

[fl1by]

Originally Posted by Hit_Apex

I'm still on stock wheels but will be trying 19x11 305 square in a few weeks. I want to run the SC3R which I'm told fit like a 320 - so still not sure about the front. This setup assumes you have coilovers/camber plates at the least, and possibly front castor adjustment (ie SPL links).

Did you ever get the 305 square to work, or what did you settle with instead?

[Hit_Apex]

Originally Posted by fl1by

Did you ever get the 305 square to work, or what did you settle with instead?

I should have mounted late next week and will report back.

[Dragonperformance]

305s on the front id complete headache. I wouldn't recommend it. Unless you run the car so high it looks like an offroader.

[shwayne5]

Originally Posted by Dragonperformance

305s on the front id complete headache. I wouldn't recommend it. Unless you run the car so high it looks like an offroader.

Do you mind explaining your comment a bit more in detail? I’m asking because 305s x 4 seems to be the way to go, and at least one shop has test fit and lapped with this setup. They’re using a small spacer (I don’t know the size) and I’m told it works. But if you’ve got some additional intel, I’m interested. Thanks!

[Dragonperformance]

Originally Posted by shwayne5

Do you mind explaining your comment a bit more in detail? I’m asking because 305s x 4 seems to be the way to go, and at least one shop has test fit and lapped with this setup. They’re using a small spacer (I don’t know the size) and I’m told it works. But if you’ve got some additional intel, I’m interested. Thanks!

The distance between the shock and front fender make it near impossible to run with out serious modification. Also something like a cup 2 tyre is about 20mm wider than the equivalent ar01.

[Hit_Apex]

I know I'm late on the update but Fedex held 1 rim for 5 days. I did have 2 tires mounted this morning in order to check fitment. So far, the rear looks good at 11et which is the rim offset, so it's the max offset I can get. The SC3Rs do protrude slightly at 2 degrees of camber but should clear when compressed (will test soon). On that note, the SC3Rs are very wide - I have a mounted 305 PSC2 and will measure the difference but it's significant. I tried to mount the front at 11et (no spacers) and the bulbous sidewall of the SC3R just contacts the strut body. Min spacer I have on hand is 10MM so I did a short drive with it but it is clear that when compressed the tire could contact the fender.

I just ordered 3MM and 5MM spacers to see which works best and should get tomorrow (thanks tom @ eas) . I did a full lock to lock test driving slowly and the rearward side of the tire just brushes the liner. The smaller spacer will help but intend to deform it in with a heat gun to give a bit more room. As for the front liner, I already have some minor trimming, 3 of the louvers in the middle of the outboard vent were removed and small trimming of the outer rib. It did not seem to rub but plan to trim or deform that area to get more room. The front camber is at 3 degrees but will likely add .5 - same with the rear, to be at 3.5/2.5

Rims are 19x11 11et with SC3R 305/30. It really is pushing, and possibly exceeding, what is advisable but I won't know until I drive it hard - possibly Sunday

Preview pic is with 10mm spacer - hoping 3mm will work and should know tomorrow if UPS doesn't disappoint.

[TrackM4x]

I am also attempting 305/30/19 3Rs on my G82 xDrive. Millway camber plates with 3 deg camber up front and OEM suspension. 19x11 wheels with total of ETA 7 offset after spacers. Still don’t trust it for track use and some rub inside on full lock. Going to test some more around street before trying on track.

[Mapper]

interested in what the results are - following.

[BackOnBlack]

Originally Posted by TrackM4x

I am also attempting 305/30/19 3Rs on my G82 xDrive. Millway camber plates with 3 deg camber up front and OEM suspension. 19x11 wheels with total of ETA 7 offset after spacers. Still don’t trust it for track use and some rub inside on full lock. Going to test some more around street before trying on track.

This does not look to me like a fit. Forget full lock, when cornering with the wheel compressed, the fender will cut into it I think.

Also, don't you think you might be giving up too much of the directness of the steering with such wide tires? Turning radius is already bordering on bad IMHO, I cannot imagine it with 305s on 11"wheels.

If it actually works, it would be a great setup though. Thank you for trying

[Hit_Apex]

I went with the 3MM spacer in the front - so total offset of ETA 8 in front and 11 in the rear.

[Hendo741]

Originally Posted by Hit_Apex

I went with the 3MM spacer in the front - so total offset of ETA 8 in front and 11 in the rear.

Tested it on track or under heavy load yet? Rubbing or clearance issues?

[Hit_Apex]

Originally Posted by Hendo741

Tested it on track or under heavy load yet? Rubbing or clearance issues?

Heavy load only - including a few high speed swells on a local road that compresses the suspension more than I've encountered on track. In that case, I had just adjusted the front ride height and over shot my target by about 3/16th. Hitting the swells caused minor contact in the front inside edge at the very top of the fender. When I got home I was shocked at how low the front had settled and re-adjusted. No issue since - my preferred ride height is about 13/16" lower than a stock CSL (which is 8mm lower than regular M4).

Regarding lock-to-lock fender liner rubbing, keep in mind that 305/30 is about .5" smaller diameter than the stock tire diameter, so that helps tremendously and has not been an issue. Also, there is no correlation between tire width and turn radius. Turn in at zero front toe feels incredible but there is some tramlining on grooved highways, and resistance to centering when on a highly crowned road. I do think the turn in feel improvement has a lot to do with the stiff sidewalls of the 3Rs. Rear is not an issue at ETA 11 but the CSL is a lot lighter, particularly in the rear. I would never consider this setup on a car I intended to have rear passengers.

It is a very close fit, so your setup precision - wheel et and/or spacers, and camber matter most. In my case front ETA of 8mm is perfectly centered with a few MM clearance to the strut on the inside and about the same on the outside to the fender under compression. If this bothers you (or are not into fine tuning et, ride height, and camber yourself) go with 10.5, or at least a different brand 305 as the 3Rs are wider than others with a noticeably thick/bulbous sidewall.

[FriedPiston]

Thank you for your contributions BulkBen and Hit_Apex

It looks like the sweet spot for this setup is 19x10.5" ET10, -3 front camber, along with your choice of 200TW (or less) 305/30/19 rubber.

[Blk5er33]

Originally Posted by TrackM4x

I am also attempting 305/30/19 3Rs on my G82 xDrive. Millway camber plates with 3 deg camber up front and OEM suspension. 19x11 wheels with total of ETA 7 offset after spacers. Still don’t trust it for track use and some rub inside on full lock. Going to test some more around street before trying on track.

Can you daily this setup? Or will the -3 camber cord the inner shoulder of the front tires? Can this be pulled off with 0 toe, daily driving during track season from March to October?

[Blk5er33]

Isn't 305 too meaty for a 10.5 inch rim? Max recommended size for a 10.5 is 295, no? It would be nice to run 305 RS4's on a 19 X 10.5 square setup.