jmartpr

That video is 4 years old....the current SC3R available in 19" is on par with MPSC2R. The regular SC3 is the equivalent of a MPSC2.
I can vouche for the SC3R and it ability to keep up with 2Rs while lasting a bit longer.....

ExMB

sictiru

I'm almost done with a set of RE71RS in 255/285 so I have SC3 245/295 20" and RE71RS 265/305 19" on order at tire rack. Both rear tires are on back order :/

I'm hoping for no surprises with 305 in the back. -2.7F and -2.2R with front camber plates, TPC toe link, Apex 9/10.5 wide wheels, stock ride height.

TRZ06

Good luck on the SC3's in the 295/20 stock size. They have been on BO now for over 1.5 years. Every date that has been listed on TR over that time frame ultimately gets changed to BO status with no date avail. every time the time reaches.

sictiru

I've seen you mention this before around here and I'm planning on getting the AD09 if I don't hear anything back in 1-2 months.

TRZ06

The AD09 is a great alternative to the SC3. They share MOST characteristics, most importantly the stiff sidewalls and them being consistent thru their entire tread depth.

I have shared my comparison between them before, but for ease of having to search...

The differences are the SC3's have a little better cold grip and a tad more ultimate grip. The SC3's also run wider than others for Tread Width and are sized more like a 255 & 305 respectively. That is probably where the additional grip levels come from compared to the AD09's rather than compound.

The great news is the AD09's have been in stock for our stock sizes since their release and do not seem to have any issues with producing them, unlike GY which just can't keep the SC3's stocked.

I suspect one of the issues with the SC3's (other than they are amazing and everyone wants them) is that they are OEM on the SS 1LE and ZL1, so they have to fill that OEM obligation first.

smclaughlin

Hi all, I just bought a 2020 718 GT4 with comprehensive track-focused modifications. I've done around 85 track days on 7 different Midwest tracks (all in 911s) and consider myself an intermediate-level driver who is always trying to improve. This is a dedicated track car for me but I will drive it to and from the track as well, so I want/need tires with decent wet weather capability so I don't get caught out in a dangerous situation on the street. On track, I care about consistency of the tire to build confidence more than I care about lap times. I am going to buy a set of 19" wheels and tires ASAP, and then have the car aligned and corner balanced to have a "fresh start", even though it currently has an aggressive track alignment.

Wheels: I'm thinking Apex SM-10RS 19X9 front and 19X11 rear.

Tires: I'm leaning toward something in the ~200 tread wear category. I've read countless posts on tires brands and sizes and tried to wade through the mess of what is available vs backordered which varies from tire to tire. One thing I am wondering: it seems for all the recommended size combinations the rear tires have a greater diameter than the front tires. Are there traction control or ABS problems when the rear tires are a bit smaller in diameter than the front tires? For instance, 265/35/19 front and 295/30/19 rear shows a few available tire choices but the rears would be about 0.4" smaller in diameter than the fronts. Is that a problem?

265/35/19 front and 295/35/19 rear has very few tire choices

The 265/35/19 front and 305/30/19 rear combo has many recommendations and many choices, but those rear tires are $$$ and I'm concerned about the rear tires rubbing even with all the track suspension bits on the car. Should I be? The car won't be set too low, again because I need to drive it to the track.

The 255/35/19 front and 285/35/19 rear has a few options and lower pricing: any endorsements for this combo?

I know, lots of questions...thanks in advance.

ramans

I'm running 255/35R19 and 305/30R19 and have a slight amount of rubbing on the left side rear fender, my race shop is going to check on this to see if they can remedy it, this is on Apex 19x9ET50 front and 19x11ET46 rears. Hopefully it can be sorted, I know several of my friends are running the same setup without issue. it's just a slight gloss on the outside lip of the tyre right now and a mark on the fender.

TRSCobra

Your only 2 options are to change to thinner control arm shims (and reduce your negative camber) or do rear camber plates to get the same camber without the shims.

DER951

What brand of tire? I’m using sc3r’s, and they’re almost an inch wider than some other 305/19’s.

is rolling the fender lip an option?

btlackey

I'm running 265/305 SC3R's with camber plates / toe links and no rubbing. -2.5 camber though.

btlackey

FYI - Longevity on the SC3R's for me looks to be about 20hc (20min sessions). I was overdriving them a bit, so probably will get a few more out of the next set, but I wouldn't expect more than 24HC.

enduro

My SC3R really shifted my car toward understeer vs same nominal size RT660 (265F 305R 19) and vs 255F 305R Cup2. (and otherwise same setup)

I'm not rolling the fronts to the ^ even with really low hot pressures. Kept lowering the fronts until I started to at least get them to roll under some and am now at 29 PSIG hot front, and while the car is still understeer prone, it's better, and lap times are decent. Still about 1/4" from wearing to the '^'. Anyone else experienced this? Will be putting my car on a lift and checking, and prob adjusting, the sway bars before the next outing.

btlackey

What were your laptime and longevity differences between those three tires?

jpbacs12

Hi are you running 245/295 on the 20"?