[feconi]

Originally Posted by SEAT TIME RULES

I'll be moving to The 660's for my Street/Auto X setup

275/30 & 295/35/19's

Then mounting the Toyo RR's for track work on my 18's.

As soon as my Yoko A052's are gone..

Not happy with the lack of feedback from the Yoko's on track. heck our steering is already crappy, then adding the Yoko's its frustrating..

Been eyeing the RT660s too for stock wheels (auto-x), slightly concerned about if that’s too much stagger and might cause ABS issues? Anyone have experience with this combo?

Also looking at the 305/30/19 for the rear with 275/30 front, but worried about that width on stock 10” wheels.

[SEAT TIME RULES]

Originally Posted by feconi

Been eyeing the RT660s too for stock wheels (auto-x), slightly concerned about if that’s too much stagger and might cause ABS issues? Anyone have experience with this combo?

Also looking at the 305/30/19 for the rear with 275/30 front, but worried about that width on stock 10” wheels.

Forget the 305's unless your running a proper rear offset 10.5 or 11" rim.

If you have a C/O setup and enough neg camber up front its possible to run the 275/30's and then the 295/35's on the rears. You should be able to dial out most if not all the understeer with TP and shock settings.

I'm at a T&T event tomorrow and will be dialing in my 265/295 setup in

[bentom2]

Originally Posted by bentom2

I’m running the RT660 in 265f/275r 35 R18 on 9.5/10.5 wheels. I have two wet days on them so far and they roughly split the difference between A052 (great) and RS4 (not great) in terms of wet traction. They don’t have the grip of the A052 on a wet surface, but the way they let go left me pretty comfortable running in some terrible conditions.

https://youtu.be/R84LTGDmfLM

I hope they split the difference on tire life and grip in the dry as well. Looks like I’ll have dry weather this weekend (fingers crossed!), so hope to have more information on them Monday.

I’m hopeful they’ll release some wider 18” sizes so I can run a more conventional setup that would be more relevant to this thread, but I’ve been curious about a 10mm stagger for a while, so figured I’d give the tire and the sizing a shot.

We got a dry track later in the day today. Started at 33 degrees and snow though. Eventually got up to 42 degrees with 20mph winds. Despite the cool temps, the RT660s were quite easy to overheat once the track dried out. I could get fast times in the first few laps, then they’d lose around 2 seconds. By about the 6th lap, they’d grease up and I’d have to back off for a lap or so.

Oh, and the fastest lap was 5 seconds quicker than my previous best on Hankook RS4. So still a quick tire, and if I backed off for a lap, they recovered well and I could run a couple more laps before they go greasy again.

Probably not a great tire for hot days. Also don’t seem to be longer wearing than the A052 I ran last fall. I like their behavior a bit more at the limit than the A052, but I’d probably run either for cold and wet days, depending on what sizes I wanted to run and availability.

I ordered another set of RS4 between sessions today to run once it warms up and dries out. The RS4 is hard to beat for tire life even if they aren’t the quickest. 3-4 day tires are just a hassle.

[ZM2]

bentom2

That does not sound promising at all for 30-45min summertime sessions! What kinds of on track tire temps & pressures were you seeing from the TPMS when the RT660 got greasy?

Thanks for your feedback!

[Gusman1]

Originally Posted by bentom2

I ordered another set of RS4 between sessions today to run once it warms up and dries out. The RS4 is hard to beat for tire life even if they aren’t the quickest. 3-4 day tires are just a hassle.

How much more tire life you getting out of the RS4s compared to the other tires?

[bentom2]

Originally Posted by Gusman1

How much more tire life you getting out of the RS4s compared to the other tires?

I can get 10 or so days from a set of RS4.They heat cycle out and lose grip before they cord.

A052 were good for three days. I think I can get a 4th out of them. I’ll find out on the 22nd.

I’ll get some pics of the RT660. I did two wet days prior to this weekend with maybe half a session (~10minutes) in the dry. Fortunately we’re changing direction so that should even out wear, but CCW yesterday left the right side tires quite worn. I did get over 200 miles on track yesterday, and will probably get similar today. Hoping I can flip them after this weekend and get another couple normal length (5x 20 minute sessions) days before they’re done.

[243Racing]

My A052s corded on day 5. With more camber they may have lasted longer

[Kelse92]

Originally Posted by BeastieBombRacing

My A052s corded on day 5. With more camber they may have lasted longer

A052's honestly just wear fast. Camber or not. Especially on these heavy cars. They seem to last somewhat better on light cars.
They are very fast, but at the expense of higher cost and higher wear.

[243Racing]

Originally Posted by Kelse92

A052's honestly just wear fast. Camber or not. Especially on these heavy cars. They seem to last somewhat better on light cars.
They are very fast, but at the expense of higher cost and higher wear.

Honestly, I'm perfectly happy with that life. I'm on the extreme end , though, where I'd buy a tire that lasted 1 day if it was 3 seconds faster

[Kelse92]

Originally Posted by BeastieBombRacing

Honestly, I'm perfectly happy with that life. I'm on the extreme end , though, where I'd buy a tire that lasted 1 day if it was 3 seconds faster

Sticker Pirelli DH or Michelin S8M's for all driving! Where's that money tree?!?

[SEAT TIME RULES]

Originally Posted by BeastieBombRacing

Honestly, I'm perfectly happy with that life. I'm on the extreme end , though, where I'd buy a tire that lasted 1 day if it was 3 seconds faster

If that's the case get some BFG R1S's.

Only thing faster is a full slick.

[243Racing]

Originally Posted by SEAT TIME RULES

If that's the case get some BFG R1S's.

Only thing faster is a full slick.

I'm switching to Pirelli DH from now on

[ZM2]

Originally Posted by BeastieBombRacing

I'm switching to Pirelli DH from now on

So, what’s the comparo of the take off Pirelli or Michelin slicks vs new R7’s?

I know the take offs are cheaper and capable of quick laps. What about grip, tread/heat cycle longevity, durability over a 30-45min summertime session, etc?

[243Racing]

Originally Posted by ZM2

So, what’s the comparo of the take off Pirelli or Michelin slicks vs new R7’s?

I know the take offs are cheaper and capable of quick laps. What about grip, tread/heat cycle longevity, durability over a 30-45min summertime session, etc?

Remains to be seen, but the prevailing wisdom is that even a takeoff slick will be capable of better times than an R7 - and consider that I can get 3 takeoffs for the price of one R7.

Also, we only get 15 minute sessions in time attack

And finally, takeoffs will only be temporary/for warmups/track tour laps. Stickers for the sessions that count

[ZM2]

Originally Posted by BeastieBombRacing

Remains to be seen, but the prevailing wisdom is that even a takeoff slick will be capable of better times than an R7 - and consider that I can get 3 takeoffs for the price of one R7.

Also, we only get 15 minute sessions in time attack

And finally, takeoffs will only be temporary/for warmups/track tour laps. Stickers for the sessions that count

I love take off pricing, but I was getting enough grip with the R7’s that I was afraid of breaking stuff on the car, e.g., I had to get the diff replaced.

Maybe the take offs vs new slicks will be a good bang/buck grip compromise that won’t over stress my daily driver on the fun days.

[SEAT TIME RULES]

I caution anyone who's looking to run slicks.

They are wicked sensitive and require being operated in a specific heat range.

I ran some take offs about 10 years ago until I had my left front tire internally let go on the downhill corner at LRP. Diapers were needed.

No more slicks for me and I'm also not chasing times anymore either.

I want to set a suspension up, set the cold tire temps, and drive with no worries.

They also are MUCH more twitchy at their rolling friction limits (squarer sidewall and internal construction)

Yes they're faster, and can be cheaper if you get the race day leftovers from a source you trust. I just don't like the extra work and worries of them...

[Rundskop]

Originally Posted by juicy

My wheel is 9.5 et23 in the front.
Unfortunately it's not apex but you get the idea. I don't think spring with smaller diameter would have any problem with et23
Here's a pic of using 275/35 in the front with spacer. 265 would be totally fine

Originally Posted by juicy

My wheel is 9.5 et23 in the front.
Unfortunately it's not apex but you get the idea. I don't think spring with smaller diameter would have any problem with et23
Here's a pic of using 275/35 in the front with spacer. 265 would be totally fine

This post and pic are super helpful. Now I'm concerned that the set up I ordered will require a spacer:

- Ohlins RT
- BBS E88 race pocket front 19x9.5 +26
- 265/30 MP4S
- Millway street camber plates

I did opt for a 7" front spring which is a tad shorter than standard.

I'd love to not use a spacer. I've seen a couple others claim to get away with 9.5 +27 and +25 on the front with Ohlins and no spacer.

[HoustonM2]

Is anyone here running 295s in the front? The Tyspeed M2 is running 295s at all four corners on 18x10.5et40 wheels. He’s got 25mm spacers up front to accommodate the extra rubber. I’m wondering if anyone else is running this setup and if so what suspension setup are you running and do you get any rub on the fender liner?

[Wisco M3]

Originally Posted by HoustonM2

Is anyone here running 295s in the front? The Tyspeed M2 is running 295s at all four corners on 18x10.5et40 wheels. He’s got 25mm spacers up front to accommodate the extra rubber. I’m wondering if anyone else is running this setup and if so what suspension setup are you running and do you get any rub on the fender liner?

I have heard of a few stock ride height M2's running 295 in front with a massive pinch. My goal is 295 square, but I really dont' want to run 25 mm spacers. I'm running 285's on a 10" rim right now, lowered on MCS w/ camber plates. 5" front springs with helpers. I recently made some ride height adjustments to get rid of push and that pushed the tire into the ride height adjuster so I moved from 7.5mm spacers to 12mm. ET 33 wheels.

Off season work is going to be to raise the entire car about 3/8" to get out of the wheel adjustment and see what I can do about fitting 10.5" rims.

[n8dgr84]

Here's my setup, looking for a "streetable" track tire.
19x9.5ET24
19.10.5ET44
Dinan HAS lowered .5" front (no inside clearance issues such as R&T)
"Street" Camber plates could be set to -2.8

-Would 265/35/19 fronts "rub" with 13mm lowering?
If not, I would run Goodyear Supercar 3/3R.
-Is 275/30/19 and 305/30/19 workable in an RT660?
-Am I stuck with a shorter 265/295/30 in Trofeo R or PSC2 Connect?

Thanks!

[ZM2]

Originally Posted by n8dgr84

Here's my setup, looking for a "streetable" track tire.
19x9.5ET24
19.10.5ET44
Dinan HAS lowered .5" front (no inside clearance issues such as R&T)
"Street" Camber plates could be set to -2.8

-Would 265/35/19 fronts "rub" with 13mm lowering?
If not, I would run Goodyear Supercar 3/3R.
-Is 275/30/19 and 305/30/19 workable in an RT660?
-Am I stuck with a shorter 265/295/30 in Trofeo R or PSC2 Connect?

Thanks!

On an M2 the 265/35 will rub under compression and at lock, but it's minor and self clears over a little bit of use. On an M2C, I think you'll have significant liner rubbing with that setup, but I couldn't tell you for certain.

You'll have no issue with the 305/30/19 and your setup, but the 275/30 may rub at lock. I think the 275/30 would be fine under compression since it's shorter, but IDK for certain if it was the height or the width of the 265/35 that rubs at lock.

The Trofeo is pretty damn comfortable & quiet relative to other streetable track tires, but lacks some grip compared to say the now gone loud ass RE-71R. Several guys have run the Supercar 3 and liked it, so that's another option depending on sizes.

The M2/M2C is definitely under tired for the track, so any rubber you can get on the car larger than stock will help.

[n8dgr84]

Originally Posted by ZM2

On an M2 the 265/35 will rub under compression and at lock, but it's minor and self clears over a little bit of use. On an M2C, I think you'll have significant liner rubbing with that setup, but I couldn't tell you for certain.

You'll have no issue with the 305/30/19 and your setup, but the 275/30 may rub at lock. I think the 275/30 would be fine under compression since it's shorter, but IDK for certain if it was the height or the width of the 265/35 that rubs at lock.

The Trofeo is pretty damn comfortable & quiet relative to other streetable track tires, but lacks some grip compared to say the now gone loud ass RE-71R. Several guys have run the Supercar 3 and liked it, so that's another option depending on sizes.

The M2/M2C is definitely under tired for the track, so any rubber you can get on the car larger than stock will help.

Someone in Tires forum says running stock height and 275/30 + 295/30 no problemo. If it's not a height issue, can I deduce that the width isn't an issue if no coil interference?