Surfndav

So I have two sets of 19" Forgeline wheels that I have been running with Hoosier 295/30/19F and 345/30/19R on my 19 GT3 RS. Well, Hoosiers are not going to be available for a while and I'd like to try some full slicks. I'm having trouble finding what size to run on these wheels. I'm sure I've seen posts with people saying they have run this setup, but my searching has come up empty-handed. Help, please.

Wind911

No personal experiencebut people run these from the info i have gathered,
Pirelli P Zero DH
458 Challenge Front 255/650-19
458 Challenge Rear 305/690-19
488 Challenge Front 275/675-19
488 Challenge Rear 315/705-19

Surfndav

I’m going to buy the 275/675-19F and 315/705-19R.
thanks for your response.
I can get a set for $650+shipping. If I can get at least one good day out of them it will be worth it.
Hoosier’s are $2100 a set and last 2 good days or 8-10 heat cycles before they fall off.

sasportas

If possible, try to find the 325 pirelli slick for the rear.

Surfndav

I have not found that size, do they make it. From what I've understood, the grip of the 315s on the Pirelli slicks is superior to the 345 Hoosiers.

chasen1211

I would recommend trying a Michelin 24/65/19 front and 31/71/19 rear. I tried to run the larger 29/67/19, but it's too wide and too tall. Was able to stuff it in, but the 24/65 size just works and fits better. You can also see the michelin recommended sizing based on rim width, assuming you're running a 10in to 10.5in on the front and 13in rim on the rear.

sasportas

Rear Pirelli
325/705/19 DH

gmgracing

We have a full set of Pirelli Ferrari Challenge slicks available Front 275/675-19 / Rear 325/705-19. They’re currently mounted on Forgeline GE1R wheels, but can be dismounted if necessary. Send us an email to sales@gmgracing.com if you’re interested.

452gt3

Will stability mgt work with either or both brands in sizing suggested?

Surfndav

I've had no problems running the T/C and the stability mgt while running the Hoosiers in the 295/30/19's and 345/30/19's. So I expect T/C S/M will work with these tires. There seems to be a consensus that if you stray from the stock sizes you will have problems with the stability mgt systems. There is a thread somewhere with a lot of discussion about this. Myself, and several others who have actually done it, seem to do fine.

452gt3

I also run the Hoosiers, I was concerned because the sizing of the slicks is quit different.
Thanks for the response

SterlingatBOM

So what about sizing for us poor folk with just a GT3 and not a RS that are dying for take off slicks?

Surfndav

I ran the Perelli Ferrari Challenge takeoffs yesterday, Wow they worked great! Shaved 3 seconds off my PR at my home 2.3 mile track. I think I’m hooked.

krell

Wind911's post covers 19" sizes for a GT3.