315/30/19 Front Fitment Question

[MoneyPit#53]

2018 Base GT350. FRPP .5-.75” lowering springs. Will the 315/30/19’s fit up front without any issues or will a small spacer be needed on the front 10.5” wheels?

Ultimately would like to run a square 315/30/19 setup if possible.

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[EFI]

You can fit that size tire/wheel up front but you'll need either a 1" spacer or some wheels with low 20s offset. Then to tuck it you'll need some -3* of camber.

 

[MoneyPit#53]

You can fit that size tire/wheel up front but you'll need either a 1" spacer or some wheels with low 20s offset. Then to tuck it you'll need some -3* of camber.

Appreciate the advice!

Was really hoping I wouldn’t have to run that much camber for that size. I guess I’ll just go the 305/35 square route that everyone else does.

 

[EFI]

Was really hoping I wouldn’t have to run that much camber for that size. I guess I’ll just go the 305/35 square route that everyone else does.

Even then if you don't want the wheels poking out past the fender you'll need some decent camber.

Look at the PP2 and how its wheels kinda poke out a bit. Ford didn't want to go super aggressive with the alignment so they choose that look instead.

 

[17MagMetal]

Poke = race car, send it.

 

[NightmareMoon]

Even then if you don't want the wheels poking out past the fender you'll need some decent camber.

Look at the PP2 and how its wheels kinda poke out a bit. Ford didn't want to go super aggressive with the alignment so they choose that look instead.

350 has wider fenders than the GT PP2. IIRC 0.4" wider? Something like that

 

[NightmareMoon]

Poke = race car, send it.

No, camber = race car.

 

[17MagMetal]

No, camber = race car.

I’ve got both. GT350 wheels need like -2.5 to tuck on a base GT and I won’t be cutting the strut towers to get that far LOL.

 

[EFI]

350 has wider fenders than the GT PP2. IIRC 0.4" wider? Something like that

Yes, that's why that car doesn't really poke by the PP2 does a bit. The same reason the Mach1 got that little fender lip thingy to hide the poke.

 

[MoneyPit#53]

I’ve got both. GT350 wheels need like -2.5 to tuck on a base GT and I won’t be cutting the strut towers to get that far LOL.

I have a GT350 though.

 

[17MagMetal]

I have a GT350 though.

Yeah sorry for hijacking.

Honestly the 315/30/19 is 20mm wider but shorter due to the aspect drop. I’d bet coffee money you could run it square. Your concern is probably rubbing up front.

If you’ve got, while compressed, ~15mm of clearance between fender/tire strut/tire I think you’d be good to go. This is assuming you have factory wheels/tires on and will be mounting a wheel and 315/30 that matches (offset wise).

My 5.0 is tapped out on space with 295/35 up front and ~-1.6 deg of negative camber (with Steeda’s plates).

 

[MoneyPit#53]

Yeah sorry for hijacking.

Honestly the 315/30/19 is 20mm wider but shorter due to the aspect drop. I’d bet coffee money you could run it square. Your concern is probably rubbing up front.

If you’ve got, while compressed, ~15mm of clearance between fender/tire strut/tire I think you’d be good to go. This is assuming you have factory wheels/tires on and will be mounting a wheel and 315/30 that matches (offset wise).

My 5.0 is tapped out on space with 295/35 up front and ~-1.6 deg of negative camber (with Steeda’s plates).

Your thoughts were mine as well but was hoping to see if another forum member was running them as well to confirm 100% or not.

 

[17MagMetal]

Your thoughts were mine as well but was hoping to see if another forum member was running them as well to confirm 100% or not.

Definitely! There’s gotta be someone here.

Apex has a LOT of good intel on max tire widths/fitment and mods necessary. I gotta find the link.

 

[17MagMetal]

https://apexwheels.com/fitment-guid...r-wheel-and-tire-fitment-guide#hardcore-track

Found it. Looks like 305 square is really where these cars end before you get into coils and hammer time.

 

[SheepDog]

I have the GT350 R fitment on my MACH1 now. fronts are 19x11 +24 with a 305/30, and the tire is only about a pinky finger away from hitting the strut. a 315 would be very close.

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