Go Wider With APEX | 11" Square fitments on the GR Supra

APEXRaceParts

Well-Known Member
Gold Sponsor
Joined
Oct 15, 2020
Threads
29
Messages
347
Reaction score
295
Location
California
Car(s)
GR Supra Sponsor
51652885524_574b0d4c2f_b.jpg

18x11 ET40 square EC-7RS with 315/30-18 Nitto NT01 tires, mods required.
When we initially began our relationship with the TAPG (Toyota Automotive Proving Ground) endurance racing team, we knew test-fitting and fitment validation would be key parts of our relationship. Their feedback about clearances on the MKV Supra platform proved to be invaluable for validating suspension clearances with both stock suspension and aftermarket coilovers for our 18x10.5 ET38 forged EC-7Rs. Once we knew we would also be bringing a staggered 18” fitment to market with our SM-10s, we asked TAPG to test our 18x11 ET40 rear wheel on the front of their A90 endurance race car to get an idea of what the clearances looked like.

50463399806_80bf8cdf20_b.jpg

We knew that if these wheels fit up front, they would be ideal for the driver looking to run an extremely aggressive square fitment. The benefits of a square 18” setup on the Supra platform are impossible to ignore. Having identical front and rear fitments would allow our customers to rotate their wheels and tires between the front and rear axles. This promotes even tire wear and ensures that grip levels remain consistent over the life of the tires. The huge increase in front tire tread width also leads to a significant increase in front-end grip aiding turn-in, especially when combined with a track alignment.

After testing this square fitment on TAPG’s track car running MCS suspension, as well as on other customer cars, we’ve added this fitment to our fitment guides and have begun recommending it to customers who are willing to heavily modify their Supra. Our condensed recommendations can be found on our GR Supra fitment guide with tire sizing and availability notes. Read on for a more in-depth look at the modifications required and test fitments conducted with these wheels.

51744968213_9edbe28b56_b.jpg

18x11 ET40 square EC-7RS with 315/30-18 Nitto NT01 tires, mods required.

Mods Required:
Aftermarket Suspension: Coilovers & select HAS kits with excellent inner clearance are a must. The higher offset required by these wheels means that the front OE suspension configuration simply will not have enough inner clearance because of the OE spring perch and rubber isolator design. For an in-depth look at how the OE front suspension can limit inner clearance, check out our 18x10 ET30 wheel notes.
Motorsport-oriented coilovers are preferred, with the most beneficial setups being those that reduce overall front stack height to move the lower perch upwards, out of the path of the tire.

We’ve tested this setup with the HKS Height Adjustable Sleeve kit and it does fit without rubbing with most tire setups. This is a more cost-effective alternative for customers who want to retain the OE dampers, but we have not tested the clearances of every HAS kit on the market

51170506722_a9af71d7ac.jpg

Pictured: 18x11 ET40 SM-10 inner clearances around front struts with Megan Racing coilovers & 295/35-18 Yokohama A052s

  • Aftermarket suspensions that have been able to run these wheels without spacers up front include but are not limited to:
    • Megan Racing
    • M Factory
    • MCS
    • JRZ
    • HKS HAS (Height Adjustable Sleeve kit)
    • KW DDC
    • Ohlins DSSV & R&T

Track Alignment: Significant negative camber is required up front to run these wheels. While they are a direct fit in the rear, -3° of camber in the front should be considered an absolute minimum with most track tires in the sizes appropriate for these wheels. More camber is often required and a setup that can achieve around -3.5° would be optimal for most of the wider tire setups.

Negative camber is beneficial for tire wear on track as well as wheel fitment in this case. Even for cars with direct fit front wheel and tires, additional negative camber aids performance and reduces outer shoulder tire wear when the car is driven hard on track. Increasing negative camber up front should be viewed as a beneficial alignment change rather than simply as a requirement to run wider wheels and tires without rubbing.

Adjustable camber plates are our preferred method for dialing in camber up front on a MacPherson strut-based suspension like the Supra’s, as tipping the strut inwards at the upper edge tends to provide more fender clearance, but we’ve also seen good results with aftermarket arms.

Additional Notes:

Full lock rubbing: This wheel and tire setup will likely rub at full lock in parking lots or midway through 3-point turns. The wider front wheels and tires will gently rub non-critical wheel well liners or in some cases aftermarket suspension arms. This will not typically be an issue at speed on the street or track where full lock is less common. An SPL front offset caster rod bushing can be used to reduce rubbing during high-steering lock turns.

51172276605_972477188a_b.jpg

Pictured: 18x11 ET40 SM-10 inner clearances with Megan Racing coilovers & 295/35-18 Yokohama A052s


Aftermarket Brake Ducts: These wheels are not compatible with most of the aftermarket brake duct cooling kits on the market that use hoses to route cooling air to the front brake rotors. The wheels occupy the space through which the hoses would typically route. Confirmed with the Verus Engineering kit.

Tire Sizes Recommended for this Fitment
These tire notes were taken from our fitment guide. They may not be all-inclusive but should serve as a starting point when selecting tires. Please note: True tire size is not always reflected by the listed size the tires are sold under. Some tire models may run wider or narrower than others with the same listed size. All front tire fitments for this setup will require additional negative camber, with taller and wider tires requiring more camber to prevent rubbing.

  • APEX Staff Pick:295/30-18 - A narrower option with great availability. The easiest size to fit of this list depending on true tire dimensions.
    • Extreme Performance Summer - Michelin Pilot Sport Cup 2 Connect (240TW), Yokohama Advan A052 (200TW)
    • R Compounds - Toyo Proxes R888R (100TW), Nankang AR-1 (100TW), Pirelli P Zero Trofeo R (60TW)
    • Semi-Slicks - Hoosier A7 (40TW), Hoosier R7 (40TW), Toyo Proxes RR (40TW)

  • Taller Alternative:295/35-18 - Fans of the A052, look no further. Because of its taller height, this option will likely require more camber despite its narrower width.
    • Extreme Performance Summer - Yokohama Advan A052 (200TW)

  • Wider Alternative: 305/660-18 - A shorter, slick tire option providing good grip and slightly easier fitment for those driving on the track only.
    • Slicks: Pirelli DH

  • Wider Alternative:315/30-18 - The widest option we recommend, and possibly the most difficult to fit. Significant negative camber will be required and fender liners may need to be trimmed, depending on the tire model. Tire availability is superb.
    • Extreme Performance Summer - Falken Azenis RT660 (200TW), BFGoodrich G-Force Rival S 1.5 (200TW), Yokohama Advan A052 (200TW), Nankang CR-1 (200 TW)
    • R Compounds - Toyo Proxes R888R (100TW), Nankang AR-1 (100TW), Nitto NT01 (100TW)
    • Semi-Slicks - Hoosier A7 (40TW), Hoosier R7 (40TW), BFGoodrich G-Force R1 S (40TW)
    • Slicks - Pirelli DHB

Test Fitments & Notes
We know seeing is believing. Below are various photos with all the specs we have on the cars and tires. This fitment is an aggressive option and we have done our best to document the various setups we’ve seen – both in person and through customer feedback – to help future owners considering this purchase understand what is required.

Nitro Yellow GR Supra

Wheels:
18x11 ET40 EC-7RS
Tires: 315/30-18 Nitto NT01 (100tw)
Brakes: Stock
Suspension:
HKS height-adjustable sleeve kit
SPL Lower Control Arms
SPL Caster Bushings
Camber: -3.4° front, -2.4° rear
Additional Notes: Minor rubbing noted at full lock

51652446543_7cbb43f826_b.jpg


51652445853_8edecd33bb_b.jpg





---

Will’s Purple Track Monster

Wheels:
18x11 ET40 EC-7RS
Tires: 315/30-18 Nitto NT01 (100tw)
Brakes: AP 9660
Suspension:
Full SPL setup + MCS 3 way RR
Camber: Over -3° front
Additional Mods: Full build thread + mod list here




51743901357_0c13e45f60_b.jpg


51744726356_2847b1cab0_b.jpg


---

TheRacersLine White Track Car
Wheels:
18x11 ET40 Anthracite SM-10
Tires: 295/35-18 Yokohama A052
Brakes: Stock
Suspension: Megan Racing Coilovers & SPL parts
Camber: roughly -2.75° front
Additional Notes: Single wheel test fitment

51171174386_d465e6de12_b.jpg


51171174506_7ee017cef7_b.jpg


Brad's Blue A90

Wheels:
18x11 ET40 EC-7RS
Tires: 315/30-18 Nitto NT01 (100tw)
Brakes: N/A
Suspension:
KW DDC
Camber: -3° front
Additional notes: Light scrubbing noted up front with 315 section tires under compression. Would recommend more camber or narrower tires if camber could not be altered.
52144518516_dd7ee378d9_b.jpg

52144541593_73cee54114_b.jpg


Image from iOS (54).jpg

---

Luke’s A90 Track Setup
Wheels:
18x11 ET40 Satin Bronze EC-7RS
Tires: 295/35-18 Yokohama A052
Brakes: Stock, Circo race pads
Suspension: M Factory coilovers & camber plates
Camber: -3.5° front, -2° rear
Additional Notes: Minor rubbing at full steering lock, Used to win a local time attack competition in Australia (Congrats Luke!)

51928878828_a64710be1c_b.jpg


51928878913_ac3aed8600_b.jpg

---
@Evolution 's Square setup
Wheels: 18x11 ET40 Satin Bronze SM-10
Tires: 315/30-18 Falken RT660s
Brakes: Stock
Suspension: Ohlins DFV
Camber: -3.1° Front, -2.3° Rear
Additional Notes: 3mm spacers required front (strut clearance) and rear (to eliminate liner rub, shown below). RT660s are known to run wide and this is the widest setup we have seen on the A90 thus far in terms of tire. 3mm spacer required but is likely not needed with 315 tire models that run narrower.

20220610_020459 (1).jpeg

20220618_090509.jpeg

20220614_190355.jpeg

20220614_193237.jpeg

20221029_125919.jpg

---
@Danno 's Square setup
Wheels: 18x11 ET40 Satin Bronze SM-10
Tires: 295/35-19 Yokohama A052s
Brakes: AP Racing
Suspension: JRZ RS Pro Coilovers
Alignment:
Front Camber: -4.2
Rear Camber: -3
Front Total Toe: 0
Rear Total Toe: .3
Caster: 7.x
Additional customer Notes:

Fitment is good. I have a steering rack limiter installed to prevent me from hitting on full lock.
Performs very well on the track. I will try 315 square next year. Seems there is plenty of space to fit, rear for sure, fronts maybe just limit the steering rack a little more.

Square setup compared to my other staggered setup gives me way more bite in on corners which is good or bad depending on your driving style.

20220618_205328.jpeg

20220708_104725.jpeg


---
@AZAutohunter's Supra on 18" VS-5RS:

Wheels:
18x11 ET40 Satin Black VS-5RS
Tires: 315/30-18 Falken RT615K+
Brakes: Stock
Suspension: Ohlins coilovers, SPL arms
Camber: -3° Front, -2° Rear
Spacers: 3mm front & rear

52473069194_51a6cf6205_b.jpg

52473069239_bf7f5aa46c_b.jpg

52473069249_5f50217b14_b.jpg

52473334968_c785386a4a_b.jpg

52472790111_8a4e29a6e6_b.jpg

52472790176_1e93b8d6d2_b.jpg



---
19x11 ET40 Square Notes
The 19x11 ET40 wheels we sell can also be used both front and rear. Fundamentally this setup requires the same modifications as the 18” setup but is less common because of a few factors. 18” wheels and tires are generally cheaper and lighter weight than their 19” counterparts and our 18” offerings clear most of the performance BBKs and the stock brakes. The 19” wheels can be used by someone looking for shorter and stiffer tire sidewalls or tire models only available in 19” diameter. This is also the only option for some cars running niche aftermarket BBKs with massive rotor diameters.
---

Jimy’s 19” square fitment
Wheels:
19x11 ET40 Satin Bronze SM-10s
Tires: Falken Azenis RT660 275/35-19
Brakes: Stock
Suspension:
HKS sleeve kit
Custom camber bushing for LCA
Vorshlag Camber Plates
Camber: Front Camber: -3.3°
Additional Notes: Owner’s IG: @Jimyssi


51360361970_5c4f9eb288_b.jpg


---
Joe's 19" square setup:
Wheels:
Satin Bronze VS-5RS
19 x 11 ET40 square

Tires: Toyo Proxes R888R
295/30/19

Brakes: Stock

Mods:
HKS height adjustable spring
Verus camber plates
-3.4 degrees camber
lowered 1" on the front, .75" on the rear
No spacers

Notes:
Haven't noticed any rubbing on compression. As others have mentioned it does contact the fender liners at full lock.

Owner's IG: joe_liska
Forum acct: @JoeDaMechanic

20220701_184629.jpeg

20220701_184748.jpeg

20220701_184606.jpeg

apex191140w2953019_2.jpeg

---
See all the APEX wheels we offer for the Supra on our website.
This thread is meant to be a living article that can serve as a resource for Supra owners looking to push the boundaries of their fitment. If you’re running these wheels and would like to add any notes or photos of your setup, please add them to the thread below and we can update the OP. Questions are encouraged and we'll do our best to provide feedback on your setups.


Questions?
Call: 925-245-0773
Email: [email protected]
Web: www.apexraceparts.com
Hours: M-F 9a-5p PST


Sponsored

 
Last edited:
OP
OP
APEXRaceParts

APEXRaceParts

Well-Known Member
Gold Sponsor
Joined
Oct 15, 2020
Threads
29
Messages
347
Reaction score
295
Location
California
Car(s)
GR Supra Sponsor
Updated OP with photos and Notes on Brad's Refraction blue A91:

Camber: -3° front
Additional notes: Light scrubbing noted up front with 315 section tires under compression. Would recommend more camber or narrower tires if camber could not be altered.

-Tom
 
OP
OP
APEXRaceParts

APEXRaceParts

Well-Known Member
Gold Sponsor
Joined
Oct 15, 2020
Threads
29
Messages
347
Reaction score
295
Location
California
Car(s)
GR Supra Sponsor
Adding photos and Notes from Joe's 19" fitment:

Wheels: Satin Bronze VS-5RS
19 x 11 ET40 square

Tires: Toyo Proxes R888R
295/30/19

Mods:
HKS height adjustable spring
Verus camber plates
-3.4 degrees camber
lowered 1" on the front, .75" on the rear
No spacers

Notes:
Haven't noticed any rubbing on compression. As others have mentioned it does contact the fender liners at full lock.

20220701_184629.jpeg

20220701_184748.jpeg

20220701_184606.jpeg

apex191140w2953019_2.jpeg
 
OP
OP
APEXRaceParts

APEXRaceParts

Well-Known Member
Gold Sponsor
Joined
Oct 15, 2020
Threads
29
Messages
347
Reaction score
295
Location
California
Car(s)
GR Supra Sponsor
Added the following 18x11 fitment to the OP. -Tom

@Evolution 's Square setup
Wheels: 18x11 ET40 Satin Bronze SM-10
Tires: 315/30-18 Falken RT660s
Brakes: Stock
Suspension: Ohlins DFV
Camber: -3.1° Front, -2.3° Rear
Additional Notes: 3mm spacers required front (strut clearance) and rear (to eliminate liner rub, shown below). RT660s are known to run wide and this is the widest setup we have seen on the A90 thus far in terms of tire. 3mm spacer required but is likely not needed with 315 tire models that run narrower.​


20220610_020459-1-jpeg.jpg



20220618_090509-jpeg.jpg



20220614_190355-jpeg.jpg



20220614_193237-jpeg.jpg
 
OP
OP
APEXRaceParts

APEXRaceParts

Well-Known Member
Gold Sponsor
Joined
Oct 15, 2020
Threads
29
Messages
347
Reaction score
295
Location
California
Car(s)
GR Supra Sponsor
Added our first 18" VS-5RS 18x11 ET40 square fitment to the OP:

@AZAutohunter's Supra on 18" VS-5RS:

Wheels:
18x11 ET40 Satin Black VS-5RS
Tires: 315/30-18 Falken RT615K+
Brakes: Stock
Suspension: Ohlins coilovers, SPL arms
Camber: -3° front, -2° rear
Spacers: 3mm Front & Rear​


52473069194_51a6cf6205_b-jpg.jpg



52473069239_bf7f5aa46c_b-jpg.jpg



52473069249_5f50217b14_b-jpg.jpg



52473334968_c785386a4a_b-jpg.jpg



52472790111_8a4e29a6e6_b-jpg.jpg



52472790176_1e93b8d6d2_b-jpg.jpg


-Tom
 
Last edited:

razorlab

Well-Known Member
First Name
Bryan / Briana
Joined
Oct 2, 2021
Threads
22
Messages
4,496
Reaction score
8,800
Location
Your moms bedsheets
Car(s)
Not a Corvette.
Added our first 18" VS-5RS 18x11 ET40 square fitment to the OP:

@AZAutohunter's Supra on 18" VS-5RS:

Wheels:
18x11 ET40 Satin Black VS-5RS
Tires: 315/30-18 Falken RT660s
Brakes: Stock
Suspension: Ohlins coilovers, SPL arms
Camber: -3° front, -2° rear
Spacers: 3mm Front & Rear​


52473069194_51a6cf6205_b-jpg.jpg



52473069239_bf7f5aa46c_b-jpg.jpg





-Tom
Those look like Falken RT615, not 660. 660 run wider AFAIK.
 

Thraxbert

Well-Known Member
First Name
Robert
Joined
May 3, 2021
Threads
24
Messages
1,034
Reaction score
1,839
Location
Texas
Car(s)
'20 Supra 3L, boosted 3.8L Gen Coupe, '93 Jimny
That is a spicy fitment.
Sponsored

 
 




Top