BSPK 18" Zuri Track Wheels

[jp129]

Wheel Specs:
Fully forged 6061-T6 Aluminum - Zuri

Fronts: 18x9.5 +60 offset; weighs 21 lbs on my corner balance scale (OEM Diamond cut forged front wheels came in at 26lbs)
Rears: 18x11 +49 offset; weighs 22 lbs on my corner balance scale (OEM Diamond cut forged rear wheels came in at 30lbs)

690 kg load rating front and rear

Ordering Process:
I already have a set of @John @ BSPK 20" wheels on the Emira (details here: BSPK Forged 20's), but wanted a set of 18s specifically for the track. While we know the GT4 uses 18's, the details aren't clear as to what would fit in the front with the brake setup, but everything fits beautifully! Rears fit courtesy of Darkwork Designs PBR kit.

Time line:
9/24/2025 - Order Placed on website, begin consult with John about desired details/measurements
12/28/2025 - Wheels received at my doorstep

Test fitment Pics:

 

[jp129]

Wheel weight:
Front - 21lbs

Rear - 22lbs

I wanted to ensure everything cleared before ordering tires. I'll get some rubber on and post some pics once they're mounted!

 

[F1 SML8R]

The wheels look great and thanks for weighing them. I've always liked the Volk Racing ZE40 style wheel.

 

[Mr.Gear]

Congrats Brotha and thanks for all the details.

I ordered wheels about a month after you, so I’m hoping I’ll have something to share at the end of next month. John was awesome to deal with and answered a million questions I had.

 

[jp129]

Tires mounted - Vitour P1 265/35 - 295/30. Tire fitment looks great and enough room to run 275/35 - 315/30 if one desired.

With these tires, the car is lowered roughly 1" due to the smaller OD. By the same token, the wheel gap increased.

I will assess how much, if any, steering lock is lost due to 9.5" widths and +60mm offset. Side profile pics to come.

 

[mr.suntorytime]

whats up with the extra emira front?

 

[jp129]

whats up with the extra emira front?

You, sir, have great attention to detail. Unfortunately, thats G5 top secret...

JK, just a spare I got from someone (I'd like to get an idea of factory clear thickness and likely use it for a track spare)

 

[jp129]

Side profile shot

I did loose a very very slight amount of steering lock, but not a practical difference.

I typically don't like to ride the rack at full lock anyway, so for me, this is a non issue. It was a squeak vs a grind, so likely that's the tire rubbing, but I'll confirm once I take them off later.

 

[Tracked Emira]

Side profile shot
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I did loose a very very slight amount of steering lock, but not a practical difference.

I typically don't like to ride the rack at full lock anyway, so for me, this is a non issue. It was a squeak vs a grind, so likely that's the tire rubbing, but I'll confirm once I take them off later.

You said the car came down 1 inch. Do you have a stock suspension? Have you lowered or plan to lower the car? What cilovers are you going to use?

 

[jp129]

I'm currently on Nitron R1s. Lowered about 12-15mm from stock. I do not plan on lowering the car any further as I daily/commute with the Emira and I don't want to lose the ground clearance.

The 18s are my track setup and it's perfect for me if it works. The variable now is if the electronics will complain.

Otherwise, lowered 1", gained some suspension travel, and shorten the gearing (something I feel I'll appreciate as the gearing on the car is quite tall) without radically altering the car's native suspension geometry is a plus.

 

[Tracked Emira]

I'm currently on Nitron R1s. Lowered about 12-15mm from stock. I do not plan on lowering the car any further as I daily/commute with the Emira and I don't want to lose the ground clearance.

The 18s are my track setup and it's perfect for me if it works. The variable now is if the electronics will complain.

Otherwise, lowered 1", gained some suspension travel, and shorten the gearing (something I feel I'll appreciate as the gearing on the car is quite tall) without radically altering the car's native suspension geometry is a plus.

Some say changing more than 1/2 inch in overall diameter will not allow the ABS to work properly.
Have you tried mashing the brakes hard to see if the antilock brakes still function properly?

 

[jp129]

Some say changing more than 1/2 inch in overall diameter will not allow the ABS to work properly.
Have you tried mashing the brakes hard to see if the antilock brakes still function properly?

Not yet. I've never ran the Vitour p1, so I want to do an eval of the tire. I'll perform a proper initial heat cycle as part of my due diligence.

I've only ever perform those at the track, so it'll have to wait until then.

 

[Tracked Emira]

Not yet. I've never ran the Vitour p1, so I want to do an eval of the tire. I'll perform a proper initial heat cycle as part of my due diligence.

I've only ever perform those at the track, so it'll have to wait until then.

When will you test the ABS system?

 

[jp129]

When will you test the ABS system?

Targeting when I make it to the track next