► GT Performance's M4 Clubsport with 18″ APEX EC-7 Wheels

[ApexWheels]

Originally Posted by kinkiracing

Sorry to bump an old thread here but any idea if 18×11″ ET25 EC-7s clear CCBs up front?

Back from the dead!

Unfortunately due to the shear size of the MCCB, you will be limited to 19" wheels for this application.

The 18x11" ET25 was specifically designed for the rear of the E9X M3, and in this scenario it is better suited for front end as the lower offset lends itself to more inner strut clearance. Naturally, this transfers the focus to the rear of the car, where the 18x11" ET25 is very aggressive (28mm more aggressive then the factory 19x10" ET40 rear wheels). In effort for these to work when the car is put through its paces on the race track, rear fender modifications will likely need to be performed in the form of "pulling/re-shaping" in combination with additional negative camber. Brett Strom from Strom Motorsports is well versed in this arena and no stranger to modifying factory fenders, therefore he chose to go this route. In some cases we have reports of customers using this square fitment with 305 tires without needing to modify the rear fenders, however adding -2 degrees or more of camber in the rear was still necessary.

We would recommend the following fitment for M4 owners running the MCCB:



Front: 19x10" ET25 with 275/30-19 tires
Rear: 19x11" ET44 with 305/30-19 tires

• Brake clearance: SB CCB
• Available in SM-10 design only.
• 5mm front spacers may be required for certain aftermarket suspensions, see below.
• Front 19x9.5" ET22 wheel can be used to avoid running spacers with certain aftermarket suspensions due to its superior inner clearance.
• 315/25-19 rear tires may also be used, but may require rolled rear fenders and/or negative camber.
• Rear 295/30-19 tires can also be used.

OR

Front & Rear: 19x10" ET25 with 275/35-19 tires

• Brake clearance: SB CCB
• 5mm front spacers may be required with certain aftermarket suspensions, see below.

I hope this was helpful information.

- Max

[kinkiracing]

Thank you for the detail!

[kinkiracing]

Originally Posted by ApexRaceParts

Back from the dead!

Unfortunately due to the shear size of the MCCB, you will be limited to 19" wheels for this application.

The 18x11" ET25 was specifically designed for the rear of the E9X M3, and in this scenario it is better suited for front end as the lower offset lends itself to more inner strut clearance. Naturally, this transfers the focus to the rear of the car, where the 18x11" ET25 is very aggressive (28mm more aggressive then the factory 19x10" ET40 rear wheels). In effort for these to work when the car is put through its paces on the race track, rear fender modifications will likely need to be performed in the form of "pulling/re-shaping" in combination with additional negative camber. Brett Strom from Strom Motorsports is well versed in this arena and no stranger to modifying factory fenders, therefore he chose to go this route. In some cases we have reports of customers using this square fitment with 305 tires without needing to modify the rear fenders, however adding -2 degrees or more of camber in the rear was still necessary.

We would recommend the following fitment for M4 owners running the MCCB:



Front: 19x10" ET25 with 275/30-19 tires
Rear: 19x11" ET44 with 305/30-19 tires

• Brake clearance: SB CCB
• Available in SM-10 design only.
• 5mm front spacers may be required for certain aftermarket suspensions, see below.
• Front 19x9.5" ET22 wheel can be used to avoid running spacers with certain aftermarket suspensions due to its superior inner clearance.
• 315/25-19 rear tires may also be used, but may require rolled rear fenders and/or negative camber.
• Rear 295/30-19 tires can also be used.

OR

Front & Rear: 19x10" ET25 with 275/35-19 tires

• Brake clearance: SB CCB
• 5mm front spacers may be required with certain aftermarket suspensions, see below.

I hope this was helpful information.

- Max

Hey Max this was extremely thorough just want to be sure I'm clear. If I'm looking at 19s then, are the sizes you lists here for the EC-7 to clear CCB? Or is the SM-10 the only wheel apex offers which clears the CCB, even for 19s? Thanks!

[ApexWheels]

Originally Posted by kinkiracing

Hey Max this was extremely thorough just want to be sure I'm clear. If I'm looking at 19s then, are the sizes you lists here for the EC-7 to clear CCB? Or is the SM-10 the only wheel apex offers which clears the CCB, even for 19s? Thanks!

Hey there! We do offer a host of 19" options, as all of our 19" wheels will clear the MCCB. The staggered fitment listed above is simply our best and most popular fitment for CCB equipped track cars. This fitment is designed to maximize front and rear traction when opting for this fitment.

Although this staggered fitment is only available in the SM-10 design, the square fitment is available in ARC-8, EC-7 and SM-10 designs! All of which will clear the MCCB system.

Sorry for the confusion!

- Max

[Lienrocs]

Bringing back an old thread.

OP, do you have specs on the Nitron set up? Spring rates, is it a coilover out back? Any other information on them would be great. Also, how have they held up?

[sicck_m4]

305 with 18x10+25 offset fit stock struts in the front? Looking to do this as well with the hopes of not adding spacers in the front. Sorry to bring this back to life but it deserves more attention. Beast setup!!!

[ApexWheels]

Originally Posted by sicck_f82

305 with 18x10+25 offset fit stock struts in the front? Looking to do this as well with the hopes of not adding spacers in the front. Sorry to bring this back to life but it deserves more attention. Beast setup!!!

To give you the best response, I'd like to know more about your car and what you are trying to accomplish.

- What suspension do you have? (assuming you have stock struts based on your initial question)
- Do you have adjustable camber plates?
- What tire compound would you like to run?
- I'm assuming your goal is to run 305 square, is that correct?

18x10" ET25 fits under the front fenders nicely and is a direct fitment with no spacers required unless you have suspension that compromises inner clearance (like KW, Ohlins R&T, or any of the height-adjustable sleeve kits). We typically recommend 275mm or 285mm tires, as they suit the 10" wheels nicely. While wider 295mm and 305mm tires can technically be mounted safely to a 10" wheel, we believe these tire widths are better suited to a wider 10.5" or 11" wheel for optimum sidewall support.

Drivers that desire a really wide tire configuration like this are clearly focused on maximizing performance and grip, therefore, it only makes sense that optimum wheel widths are also used to fully leverage these compounds.


18" Square Configurations:
I've listed general notes for each, but variables like tire brand/size, suspension type, & vehicle ride height will be contributing factors that should be discussed.

F/R: 18x10" ET25
- Rotatable
- 275 or 285mm tires recommended
- No spacers required
- Mild negative camber may be required for some 285mm tires (although we would suggest negative camber for any track setup)
- Suspensions that compromise inner strut clearance like KW, Ohlins R&T, height-adjustable sleeve kits will need a minimum of 5mm spacers, or you can modify the spring configuration on the KW or Ohlins R&T to improve clearance.

F/R: 18x10.5" ET40
- Rotatable
- 275 - 295mm tires recommended
- 20 - 25mm spacers typically required up front (depends on suspension, tire brand/size & ride height)
- Aggressive negative camber specs up front required
- Fitment not recommended if you are running suspensions that compromise inner strut clearance like KW, Ohlins R&T, height-adjustable sleeve kits unless you are willing to modify the spring configuration to improve clearance.

F/R: 18x10.5" ET22
- Rotatable
- 275 - 295mm tires recommended
- 5mm spacers typically required up front (depends on suspension, tire brand/size & ride height)
- Aggressive negative camber specs front & rear required
- Rear fender rolling recommended
- Fitment not recommended if you are running suspensions that compromise inner strut clearance like KW, Ohlins R&T, height-adjustable sleeve kits unless you are willing to modify the spring configuration to improve clearance.

F: 18x11" ET25 / R: 18x11" ET44 * As pictured in OP *
- Non-rotatable
- 295 - 315mm tires recommended
- 12mm spacers typically required up front (depends on suspension, tire brand/size & ride height)
- Aggressive negative camber specs up front required
- Fitment not recommended if you are running suspensions that compromise inner strut clearance like KW, Ohlins R&T, height-adjustable sleeve kits unless you are willing to modify the spring configuration to improve clearance.


- Ryan

[sicck_m4]

Originally Posted by ApexRaceParts

To give you the best response, I'd like to know more about your car and what you are trying to accomplish.

- What suspension do you have? (assuming you have stock struts based on your initial question)
- Do you have adjustable camber plates?
- What tire compound would you like to run?
- I'm assuming your goal is to run 305 square, is that correct?


- Ryan

Thanks for the great information. Currently have a set of Apex EC-7 18x10+25 and 18x11+44. Looking to run 305/35 or 305/30 squared with stock struts and H&R Super Sports springs. Do you think this is possible without camber plates or spacers?

[ApexWheels]

Originally Posted by sicck_f82

Thanks for the great information. Currently have a set of Apex EC-7 18x10+25 and 18x11+44. Looking to run 305/35 or 305/30 squared with stock struts and H&R Super Sports springs. Do you think this is possible without camber plates or spacers?

Happy to help! A few comments...

Running 305mm tires on the front 10" wheels is less than ideal due to lack of sidewall support, but as described above, it can be done.

Although 18x10" ET25 with 275 or 285mm is a direct fit (no spacers required) up front, 305mm track/race compounds are wide enough to the point that spacers are likely going to be needed to prevent making contact with the strut. Since spacers are likely required, you may as well run the ideal 18x10.5" or 18x11" wheels mentioned in my previous post.

Negative camber is vital to a well-performing chassis, regardless of which front wheel spec you decide to run. Not only will negative camber help squeeze wider wheels and tires under the front fender arches to avoid rubbing/damage upon compression, it also drastically improves turn-in, grip throughout the corners, and tire wear/longevity. In other words, it doesn't make a lot of sense to spend $$ on running the widest and most aggressive compounds available for a particular chassis, when some of the foundational prep work has yet to be done to ensure you can fully leverage them.

I would say that investing in a set of adjustable camber plates and a track-oriented alignment with your existing staggered setup would give you the best immediate ROI.

If the absolute goal is to run 305 square, ideally you would purchase a pair of adjustable camber plates, a pair of EC-7 18x11" ET25 front wheels to mate up with your rears, and the appropriate 12mm spacers. Keep in mind most F8X M's with this aggressive of a wheel and tire fitment are running motorsport grade coilovers with adjustable camber plates that can achieve -3.5º of front camber or more.

I hope this helps, but please let me know if you have further questions

- Ryan

Looks really interesting suprised at the 18" need to look further into this incredible wheels/tyres setup to compliment this car.

[Expert@ApexWheels]

Originally Posted by MudassarN

Looks really interesting suprised at the 18" need to look further into this incredible wheels/tyres setup to compliment this car.

Let us know if you have any questions about this setup!

-Tom

Originally Posted by Expert@ApexRaceParts

Let us know if you have any questions about this setup!

-Tom

Hey appreciate the response do you operate in the UK ?

[David0ff]

Man I'm really loving the EC7, currently I'm on sm10 19" 10"&11" but next season I'm going 18 with EC7.

[Expert@ApexWheels]

Originally Posted by MudassarN

Hey appreciate the response do you operate in the UK ?

Apologies for the delay! We generally recommend ordering from Tegiwa if you are based in the UK: https://www.tegiwaeuro.com/

-Tom

[Akbubba47]

up for future reference