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Technical Topics Wheels and Tires 19" Forgestar F14 Bronze on Portimao Blue M340i

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      08-22-2019, 07:39 PM   #1
raptorapture
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19" Forgestar F14 Bronze on Portimao Blue M340i

Big thanks to Kevin **********s and Forgestar Wheels for going back and forth with me regarding fitment and tires.
---Specs---
Front Wheels- 19x8.5 +25 (Semi Deep Concave)
Rear Wheels- 19x9.5 +30 (Deep Concave)

Front Tires - Michelin Pilot Sport 4S 245/40/19
Rear Tires - Michelin Pilot Sport 4S 265/35/19
-------




Rears have a bit more room to go wider but would have to adjust the offset since +30 is showing a little poke, front fitment is tight on this one with +25.


Rear wheel and tire profile.


Front fitment.

Waiting for Dinan to wrap up their R&D on the suspension goodies so I can drop it a hair to eliminate some of the gap.
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      08-22-2019, 08:13 PM   #2
stratatak7
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Beautiful car! The F14's look so good.
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      10-11-2019, 06:31 PM   #3
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How wide could you go with the rest? Do you know what the offset would change to?
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      10-11-2019, 10:09 PM   #4
raptorapture
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Quote:
Originally Posted by Wyndi335I View Post
How wide could you go with the rest? Do you know what the offset would change to?

Rears you could go wider, I have to get the car up in the air and check it out to see how much wider but i dont think 10" wide wheels with 275's would be an issue other than when you pass 265 you start getting into hydroplane city.. Fronts are probably about perfect there in my opinion.
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      10-11-2019, 10:13 PM   #5
raptorapture
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Couple more images after a bath.
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      10-17-2019, 09:42 PM   #6
Wyndi335I
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They really look nice. I want 20's but the 30 and 25 profile scares me. I have a 7 with 22's and bent my wheel on a pot hole. Also I do not want to compromise ride.
I was thinking a 19 x 9 with a 245 and a 19x10 with a 275 or 285 rear. Not sure if this will fit.
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      10-18-2019, 09:50 AM   #7
BarryB
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Those look great. Can't wait to see mine with the same tire sizes (different wheels)
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      02-13-2020, 09:58 AM   #8
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Quote:
Originally Posted by raptorapture View Post
Big thanks to Kevin **********s and Forgestar Wheels for going back and forth with me regarding fitment and tires.
---Specs---
Front Wheels- 19x8.5 +25 (Semi Deep Concave)
Rear Wheels- 19x9.5 +30 (Deep Concave)

Front Tires - Michelin Pilot Sport 4S 245/40/19
Rear Tires - Michelin Pilot Sport 4S 265/35/19
-------

[IMG]
View post on imgur.com
[/IMG]
[IMG]
View post on imgur.com
[/IMG]

Rears have a bit more room to go wider but would have to adjust the offset since +30 is showing a little poke, front fitment is tight on this one with +25.

[IMG]
View post on imgur.com
[/IMG]
Rear wheel and tire profile.

[IMG]
View post on imgur.com
[/IMG]
Front fitment.

Waiting for Dinan to wrap up their R&D on the suspension goodies so I can drop it a hair to eliminate some of the gap.
According to tyre and wheel calculator you have wheel outside diameter at front 679mm (26.7") and at rear 669mm (26.3") so rear wheel has 10 mm (1.5%) smaller outside diameter then front wheel. As I know it's not good for xDrive transfer case. As I see you have RWD car, you don't have this problem. How do you think is it necessary to use 235/40 + 265/35 tyres size on xDrive car with the same wheels?
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      02-13-2020, 10:49 AM   #9
ChOy BoY
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love these wheels had it on my E93 super deep concave front and back. look great on the car!
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      02-17-2020, 06:49 AM   #10
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Quote:
Originally Posted by Denys_BMW View Post
Quote:
Originally Posted by raptorapture View Post
Big thanks to Kevin **********s and Forgestar Wheels for going back and forth with me regarding fitment and tires.
---Specs---
Front Wheels- 19x8.5 +25 (Semi Deep Concave)
Rear Wheels- 19x9.5 +30 (Deep Concave)

Front Tires - Michelin Pilot Sport 4S 245/40/19
Rear Tires - Michelin Pilot Sport 4S 265/35/19
-------

[IMG]
View post on imgur.com
[/IMG]
[IMG]
View post on imgur.com
[/IMG]

Rears have a bit more room to go wider but would have to adjust the offset since +30 is showing a little poke, front fitment is tight on this one with +25.

[IMG]
View post on imgur.com
[/IMG]
Rear wheel and tire profile.

[IMG]
View post on imgur.com
[/IMG]
Front fitment.

Waiting for Dinan to wrap up their R&D on the suspension goodies so I can drop it a hair to eliminate some of the gap.
According to tyre and wheel calculator you have wheel outside diameter at front 679mm (26.7") and at rear 669mm (26.3") so rear wheel has 10 mm (1.5%) smaller outside diameter then front wheel. As I know it's not good for xDrive transfer case. As I see you have RWD car, you don't have this problem. How do you think is it necessary to use 235/40 + 265/35 tyres size on xDrive car with the same wheels?
I believe as long as the rolling diameter is within 3% on an x drive car you're ok.
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      02-19-2020, 12:30 AM   #11
Denys_BMW
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Quote:
Originally Posted by mischiefbenz View Post
I believe as long as the rolling diameter is within 3% on an xs rove car you're ok.
What does "xs" mean? If you mean xDrive then the difference between the diameter of the wheels on the front and rear axles should be no more than 1%.
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      03-01-2020, 04:15 PM   #12
NoTanks52
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If one wants to go super deep concave on both front and rear with the F14, and the front in 19'' only shows available in that profile at 19x9.5, can we go that high in the front?

Last edited by NoTanks52; 03-02-2020 at 01:16 AM..
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