I have two sets of these wheels shipping hopefully this week so I have them for BIR next weekend. It doesn't sound like they're marked "FRONT" or "REAR" nor do they have offsets marked on them.. I'm using 295s up front and 315s in the back so need to make sure I get them mounted to the correct wheels. Does anyone have these wheels and know how to identify which ones are front versus rear? Vorschlag keeps their offsets "proprietary" so I don't know which wheel has more offset. I'm guessing it's the rears because the fronts need to be pushed further from the strut. Any help distinguishing them from someone who is using these would be appreciated since I'm going to be running short on time and may not have time to mess with test fitting them before mounting tires.

Forgestar F14 Mesh Wheel, 18x11", PCD: 5x114.3,
Color: Flat Black, Fitment: S197 Mustang FRONT

Forgestar F14 Mesh Wheel, 18x11", PCD: 5x114.3,
Color: Flat Black, Fitment: S197 Mustang REAR

I think it's the rears which have more offset, but if you take measurements for me then I'll confirm it.

Grant 302 said:

I think it's the rears which have more offset, but if you take measurements for me then I'll confirm it.

Click to expand...

In other words, the fronts will sit outboard further than the rears? Let me know where to measure to and from. Inside of rim to hub?

cloud9 said:

In other words, the fronts will sit outboard further than the rears? Let me know where to measure to and from. Inside of rim to hub?

Click to expand...

Yes and yes!

Grant 302 said:

Yes and yes!

Click to expand...

Good deal thanks!

The fronts should have around ~20mm less backspacing.

neema said:

The fronts should have around ~20mm less backspacing.

Click to expand...

Perfect. Just to confirm, that means if I measure from the inside of the wheel to the hub, the front hubs will be 20mm closer to the inside edge of the wheel than the rears.

Correct. From the inside rim surface to the hub pad (aka backspace measurement). Rears will have ~8" of backspacing, fronts somewhere around 7-7.2" backspacing

So the fronts will have more mass in the hub area and you can use that to identify them?

That all sounds right.

Rick - Good idea. I don't see why not.

Rears have 8 1/4" backspacing and fronts have 7 3/8".

06mach1 said:

Rears have 8 1/4" backspacing and fronts have 7 3/8".

Click to expand...

Great, thanks for all the info guys. Makes it easy. The hard part now is going to be getting them here by next Wednesday. Damn port strike. Glad they widened the Panama Canal so we don't have to be held hostage by the CA dock workers every few years.......

In for pics of the new shoes mounted up on the pumpkin, Gary... Playing around with track wheel & tire options myself... Thinking the F14s in an 18x10 front, 18x11 rear may be the ticket for me for a while.

Z20WHAT said:

In for pics of the new shoes mounted up on the pumpkin, Gary... Playing around with track wheel & tire options myself... Thinking the F14s in an 18x10 front, 18x11 rear may be the ticket for me for a while.

Click to expand...

You got it. Just got a call yesterday that they were shipping so shouldn't be long. I won't have them for BIR this weekend but will get tires mounted up for NASA event mid-May.

NFSBOSS said:

So the fronts will have more mass in the hub area and you can use that to identify them?

Click to expand...

Yes

Dude..WHAT PAGE ARE THE PICS ON???

ArizonaBOSS said:

Dude..WHAT PAGE ARE THE PICS ON???

Click to expand...

I'm afraid patience is in order. I just dropped them off to mount tires but may not get them on the car until next weekend for the NASA event the following weekend.

Z20WHAT said:

In for pics of the new shoes mounted up on the pumpkin, Gary... Playing around with track wheel & tire options myself... Thinking the F14s in an 18x10 front, 18x11 rear may be the ticket for me for a while.

Click to expand...

I test fit the wheels today. I will be running a 1/4" spacer front and rear. At the front it leaves me with about 1/8" clearance to the strut with a 295/30/18 Hoosier R7 to the rim protector on the tire. I am going to use a 1/4" in the rear just to maintain the track with the front wheels. I did have to remove my inner fender liners in the rear otherwise I would be rubbing them.

I think I'm going to accomplish my goal of increasing the contact patch with the wider wheels on the same sized tires. The first picture is a stack of R7s 295 & 315 on the 11" Forgestars and the other stack is 305 & 315 Pirelli Slicks on 9.5" and 10.5" wheels. The Forgestar stack is a full 3" taller!

cloud9 said:

I test fit the wheels today. I will be running a 1/4" spacer front and rear. At the front it leaves me with about 1/8" clearance to the strut with a 295/30/18 Hoosier R7 to the rim protector on the tire. I am going to use a 1/4" in the rear just to maintain the track with the front wheels. I did have to remove my inner fender liners in the rear otherwise I would be rubbing them.

I think I'm going to accomplish my goal of increasing the contact patch with the wider wheels on the same sized tires. The first picture is a stack of R7s 295 & 315 on the 11" Forgestars and the other stack is 305 & 315 Pirelli Slicks on 9.5" and 10.5" wheels. The Forgestar stack is a full 3" taller!

Click to expand...

Looks great. These tires are definitely pinched especially on the 9.5" wheels. Be interesting to see how your times improve with the wider contact patch.

RPM (Formerly MAM) in a couple weeks will be a good test. It's a 2.3 mile very technical track where decreasing radius cornering matters more than BIR or RA. At some point I wonder if the rolling mass eats into straightaway speeds at big tracks like RA or BIR? These things are steamrollers