2021 Star G80 PS4S tires

[PayamFSU]

After seeing a recent review on YouTube I was wondering if anyone thinks the new STAR fronts in 275/35/19 would fit in the front on the F80?

I run RS-4 265/40/18 and 295/40/18 on apex ec-7 9.5 front and 11 rear no issues

UPDATE: the star spec new g8x 275/35/19 fit great and really are such a better tire for the front end of this car. I went generic 295 ps4s for the rear.

[guess2098]

Originally Posted by PayamFSU

After seeing a recent redivide I was wondering if anyone thinks the mew star fronts in 275/35/19 would fit in the front on the F80?

I think it will fit no problem.
although it's 275 but tire thread width is stretched so much vs regular 265/35/19 and 275/35/19

Tire is 26.6 vs 26.3 overall diameter so not too much.

[PayamFSU]

Regarding this video if some haven't seen it

[CanAutM3]

To take the full advantage of those G8X spec tires, one would ideally pair them with aftermarket wheels in 19"x9.5 / 20"x10.5 sizes as they are optimized to work in staggered diameters on those wheel widths. However, I believe they could work decently well on a 763M 19"/20" setup. I would have loved to try those tires on my M4cs.

One could expirement mixing and matching the front of the 19"/20" G8X spec with the rear 18"/19" G8X spec tires on 437M wheels, but I have a strong hunch this would yield sub-optimal front/rear balance characteristics.

[PayamFSU]

I have the Richland forged GT-4 in 19x9.5 and 19x10.5. Going to get the new BMW star spec see what they are like, should be better than the off the shelf ps4s. Tire rack gets the mid July. I'll update this thread then unless I get inpatient and order another tire…..

[Sunny D]

Originally Posted by PayamFSU

I have the Richland forged GT-4 in 19x9.5 and 19x10.5. Going to get the new BMW star spec see what they are like, should be better than the off the shelf ps4s. Tire rack gets the mid July. I'll update this thread then unless I get inpatient and order another tire…..

Any chance you have an update? I'm interested in ordering up GT-4s and this set. Wondering if the fronts fit. Thanks!

[PayamFSU]

Originally Posted by Sunny D

Any chance you have an update? I'm interested in ordering up GT-4s and this set. Wondering if the fronts fit. Thanks!

Yeah I posted in another thread nest tire , changed the car , the front end is more precise and dialed in should have come this way.

[Sunny D]

Originally Posted by PayamFSU

Yeah I posted in another thread nest tire , changed the car , the front end is more precise and dialed in should have come this way.

Sweet, that's great to hear! I just did a search and found this thread. I will search it out. Thanks

[jaylazy2020]

As it's a G series wheel is the fitment 5x112 like my old G30


And an F series is 5x120?

[PayamFSU]

I think the question was in regard to the tire not the wheels

[PayamFSU]

Originally Posted by Sunny D

Sweet, that's great to hear! I just did a search and found this thread. I will search it out. Thanks

I'm updating the original post with updated info thanks!

[Sunny D]

Originally Posted by PayamFSU

I'm updating the original post with updated info thanks!

Thanks for the update. Question - what wheel sizing did you go for? And, are you lowered at all? Spacers?

[PayamFSU]

Originally Posted by Sunny D

Thanks for the update. Question - what wheel sizing did you go for? And, are you lowered at all? Spacers?

Richland forged GT-4 in 19x9.5 and 19x10.5. No spacers. Eibach springs , -2.2 front camber

[eXstasy]

Originally Posted by PayamFSU

Yeah I posted in another thread nest tire , changed the car , the front end is more precise and dialed in should have come this way.

EDIT: Nevermind, I found your post here
https://f80.bimmerpost.com/forums/sh....php?t=1846072

Looks like you ran

19x9.5
275/35/19 PS4S, (100Y) XL, Star BMW
300 AA A 1,764 lbs 50 psi 9.5/32" 26 lbs 9-11" 9.5" 10.9" 8.9" 26.6" 783 FR

19x10.5
295/35/19 PS4S, (104Y) XL, MO1 Mercedes
300 AA A 1,984 lbs 50 psi 9.5/32" 28 lbs 10-11.5" 10.5" 11.9" 9.8" 27.1" 767 FR

I was just curious because I was wondering about the rolling diameter differences for your front and rear tires. The Mercedes 295s tread width of 9.8" seems thin for for what they are.

[csboi]

Originally Posted by CanAutM3

To take the full advantage of those G8X spec tires, one would ideally pair them with aftermarket wheels in 19"x9.5 / 20"x10.5 sizes as they are optimized to work in staggered diameters on those wheel widths. However, I believe they could work decently well on a 763M 19"/20" setup. I would have loved to try those tires on my M4cs.

I just fitted a set of CUP2 Star on my CS, and didn't actually know that a G8X Star specification existed. For these tires, is Star a Star? They fit both F8X CS/GTS and G8X? Or are G8X Star and F8X Star different from one another?

Edit: Thinking back to my actual order, I believe the compatible vehicle was listed as GTS.

[CanAutM3]

Originally Posted by csboi

I just fitted a set of CUP2 Star on my CS, and didn't actually know that a G8X Star specification existed. For these tires, is Star a Star? They fit both F8X CS/GTS and G8X? Or are G8X Star and F8X Star different from one another?

Edit: Thinking back to my actual order, I believe the compatible vehicle was listed as GTS.

Each "star spec" is vehicle specific. The F82 CS/GTS star spec PSC2 are of 265/35R19 and 285/30R20 sizes with a 180TW rating while the G8X star spec PSC2 are of 275/35R19 and 285/30R20 sizes with a 240TW rating. The G8X ones are the latest of PSC2 development and offer better performance than the older F8X ones.

[RugbyBro]

Originally Posted by csboi

I just fitted a set of CUP2 Star on my CS, and didn't actually know that a G8X Star specification existed. For these tires, is Star a Star? They fit both F8X CS/GTS and G8X? Or are G8X Star and F8X Star different from one another?

Edit: Thinking back to my actual order, I believe the compatible vehicle was listed as GTS.

Michelin PN:
Front - 33112
Rear - 37028

Just finished a season with them, great overall when fresh but really fall off on track after 15-20 heat cycles. I’m at 20+ now (probably 15+ from track and 5 from long road trips), I PB’d yesterday on them but it took a lot of managing and the latter half of the day was noticeably greasier than the morning. Overall I think they’re a great arrive and drive option but will suffer from getting heat cycled as a daily tire and are pretty expensive as a pure HPDE tire.

[CanAutM3]

Originally Posted by RugbyBro

Michelin PN:
Front - 33112
Rear - 37028

Just finished a season with them, great overall when fresh but really fall off on track after 15-20 heat cycles. I’m at 20+ now (probably 15+ from track and 5 from long road trips), I PB’d yesterday on them but it took a lot of managing and the latter half of the day was noticeably greasier than the morning. Overall I think they’re a great arrive and drive option but will suffer from getting heat cycled as a daily tire and are pretty expensive as a pure HPDE tire.

Agreed. The PSC2 are one of the better dual use (daily drive and track) tire out there. However, they are not the best dedicated track tire for sure. As RugbyBro mentioned, they do heat cycle out pretty fast and fall off after 3~4 track days. However, if you are not too concerned with lap times, they still hold up to a few more track days of fun. They are very sensitive to over pressure though, but as long as you keep them in the ~32psi hot range and never exceed 35psi, they wear down nicely and evenly with no chunking. Since I can no longer schlepp a dedicated set of track wheels and tires with me in my 911, I resorted to the PSC2 as a dual use tire. I have to say I have been pretty impressed with them and they last me about twice as long as the NT01 did. Twice the cost of the NT01 on my M4, but twice the longevity; so about same running cost while being ~5sec a lap faster (because of the car, not the tires; but the faster the laps, the more stress on the tires). Here are my tires after 8 track days (~50 session/heat-cycles). Not bad considering they also serve the daily drive use.

[FrozenGT]

Take a look,

I am running that setup right now!! Car feels amazing through the turns.

255/35/19 PS4S BMW *
285/30/20 PS4S BMW *
Wheels 763 M 19F /20R

Tires took 4 moths to get from TireRack.com

[Sunny D]

I recently had the G80 star spec tires put on my F80, and wow, what an amazing setup. I've not tracked them, but just the feeling on the road is pretty amazing. The biggest improvement for me is the "wiggle" that happens with quick steering inputs on the normal PS4S is gone. Big win.

No rubbing or any issues with the 275s up from on the F80.

I'm on RF 19s/20s. Rims are great, sadly not much lighter from the 666s IMO. But they are wider, so there is that.

Question - what pressures are folks running with these? My buddy as a CS, and his door sticker recommends 35 cold...

[csboi]

I run my CUP2 * (Connect) at 35PSI hot on track. This has been about 28-29PSI cold/warm, ish.

[RugbyBro]

Originally Posted by csboi

I run my CUP2 * (Connect) at 35PSI hot on track. This has been about 28-29PSI cold/warm, ish.

Yup I target 33/34psi hot, usually means 27/28psi cold. Had decent weather to run the Cup2s yesterday. Even tho they’re heat cycled a ton, driving 7/10ths they had plenty of grip still. Definitely no flying lap pace anymore tho.