Fitment question: will 18x10.5" et 38mm fit?

[Sydewaysix]

Does anyone know if 18x10.5 et 38mm wheels (square) will fit properly on my '13 Boss? Will I have either brake clearance and/or fender rubbing issues? I see that most people run ~42mm and higher offsets so I'm wondering if the 38mm will fit poorly.

Thanks!

 

[ArizonaBOSS]

That is what I run on my race car. Enkei PF01 18x10.5 +38.

They will poke out of the rear fender about 1/2 inch on each side. They will fit under the front with camber (I am running -3 to -4 degrees, which will kill street tires), but you may need to roll your fenders depending on what tire size you want to run.

You may also need to run a small spacer in the front depending on your tire selection, in which case I recommend you install the ford racing front hubs w/ ARP studs.

 

[Sydewaysix]

That is what I run on my race car. Enkei PF01 18x10.5 +38.

They will poke out of the rear fender about 1/2 inch on each side. They will fit under the front with camber (I am running -3 to -4 degrees, which will kill street tires), but you may need to roll your fenders depending on what tire size you want to run.

You may also need to run a small spacer in the front depending on your tire selection, in which case I recommend you install the ford racing front hubs w/ ARP studs.

Thanks! The wheels I am being offered are the exact ones - Enkei PF01. He also has a set of Enkei RPF1 in 18x9.5 et 45mm. Any chance these would be a better choice?

 

[ArizonaBOSS]

This statement only applies to the PF01, not the RPF1: The 9.5s will fit properly under the fenders but they have fatigue issues from track use where the spokes crack. We haven't seen this on the 10.5s.

If you are mostly street driving, this should not be a concern.

 

[Sydewaysix]

The 9.5s will fit properly under the fenders but they have fatigue issues from track use where the spokes crack. We haven't seen this on the 10.5s.

If you are mostly street driving, this should not be a concern.

Fatigue issues are specific to the 9.5" width, or to the RPF1 model? These would be dedicated track wheels, so likely very little street use.

 

[7500RPM_Ben]

I think it is mostly the RPF1 model, they were designed for lighter cars.

 

[ArizonaBOSS]

Sorry guys, I misread the post. The RPF1s are not affected by the fatigue issues, as far as we are aware. That is only with the 9.5" versions of the PF01.

With the RPF1 you will have to check to make sure they clear your Brembos in the front (side of caliper to back side of spokes). I think Vorshlag has tried to get these on their Brembo GT in the past but couldn't make it work. Maybe if you use a spacer and ARP studs.

@modernbeat can you update the test history on the RPF1 on a Brembo S197?

 

[Sydewaysix]

Sorry guys, I misread the post. The RPF1s are not affected by the fatigue issues, as far as we are aware. That is only with the 9.5" versions of the PF01.

With the RPF1 you will have to check to make sure they clear your Brembos in the front (side of caliper to back side of spokes). I think Vorshlag has tried to get these on their Brembo GT in the past but couldn't make it work. Maybe if you use a spacer and ARP studs.

@modernbeat can you update the test history on the RPF1 on a Brembo S197?

Thanks for the clarification @ArizonaBOSS ! So with the two options, 18x10.5 et 38mm PF01s and 18x9.5 et 45mm RPF1s, it seems neither will work without slight modification. I'd definitely prefer the PF01s but don't really want to roll my fenders, especially if I don't run as much from camber as your race car. Hopefully @modernbeat can chime in and confirm whether the RPF01s will work in 18x9.5 et 45mm. I wouldn't mind running a thin spacer up front, but would really like to avoid any additional work to the car of possible.

 

[VoodooBoss]

I would not settle for 9.5" widths. Go 10's and I highly recommend these in black:

https://www.apexraceparts.com/shop-by-vehicle/mustang/s197-sn95-mustang/18x10-et43-apex-ec-7-mustang-wheel.html

 

[Sydewaysix]

I would not settle for 9.5" widths. Go 10's and I highly recommend these in black:

https://www.apexraceparts.com/shop-by-vehicle/mustang/s197-sn95-mustang/18x10-et43-apex-ec-7-mustang-wheel.html

Those Apex wheels are really nice! Almost look like the BBS wheels on the 302R. But I can get the Enkei wheels for ~$500/set so it's a very inticing price for track wheels. I'd definitely like those Apex wheels for street bling though 8)

 

[VoodooBoss]

Those Apex wheels are one of your best options for track wheels not bling.

 

[Sydewaysix]

Those Apex wheels are one of your best options for track wheels not bling.

I didn't realize they were right around the corner in Livermore, Ca! May need to pay them a visit and check these out in person

 

[steveespo]

Re: Fitment question: will 18x10.5" et 38mm fit?

Wish Apex would do a 10.5 and 11 fitments for S197/550 Mustangs


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