Z34 spare tire for WGNC34 BBK - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

adey · 05-04-2022, 11:02 PM

Hi all!

I am trying to solve a spare tire problem.

SHORT VERSION:
Will the Z34 spare wheel/tire clear 360mm discs and OEM BREMBO calipers on my WGNC34?

LONG VERSION:
I have a Stagea WGNC34 (RB26DETT/AWD) with the BIOT big brake disk kit. This keeps the OEM BREMBO 4-pot calipers but up-sizes the brake discs to 2-piece 360mm units (OEM is 324mm).

Naturally, I test-fitted the spare tire that came with the car, and it won't clear the brakes. However, I do like the idea of having a spare, since the car is a daily, and I am fine to haul around a few extra pounds for the peace of mind. So, I started looking for alternatives.

Of course, first thought was: "What is the narrowest 17" TE37 made?" but I quickly realized that even if they made a 17*6 wheel, it would stick out too far in the spare tire slot.

That got me thinking about other OEM spares... and the Z34 came up. It has a 355mm OEM brake disk with those giant Akebono/Nissan calipers, and I figure they should fit my need... but I've never seen a photo of the Z34 on a spare tire, let alone details of how the brake clearance looks from behind the wheel.

*So, would anyone here volunteer to test fit their Z34 spare on the front of their car and take some detailed photos of the caliper clearance for me?? Or could you make a prediction on whether or not this would fit my needs?*

Thanks!!

(I never thought I would be posting something almost specific to the Z34, but here we are!)

And yes, I realize I would need to keep a set of 5 Z34 lugnuts with the spare wheel, since the mounting face is most likely different from my existing wheels.

adey · 05-04-2022, 11:22 PM

A little bit of supplementary info:

WGNC34 Spare:
17*4
145/70-17
(Dia: 24.99")

Z34 Spare:
17*4
145/80-17
(Dia: 26.13")

That makes the Z34 spare's over-all diameter of the tire about 1" wider/taller than the WGNC34's! I may have a spare tire trunk space fitment problem lol
Will have measure that up later, though...

AKADriver · 05-05-2022, 08:03 AM

If you wanted to go full baller with a new wheel, there's a company called Modern Spare that makes new 18x4" alloy spares for various new cars that don't come with factory spares with different tire diameter options. They say it clears the Akebono 4-pots on the Infiniti Q50/Q60 but needs a spacer for the Brembo 6-pots on the R35 GT-R and Mustang GT350.

https://modernspare.com/product-cate...-kits/5x114-3/

Edit: apparently the 370Z with Akebonos also uses an 18" alloy spare with a 145/70R18, not 17".

https://www.redlineautoparts.com/nis...el-18x4-7z010/

adey · 05-05-2022, 11:12 PM

Wow, thanks, that's a good find. Appreciate it!

Can you (anyone) think of any big brake clearance cars/spare tires that use the standard M12 cone-type lugnuts so I don't have to buy a spare set of Z34 lugnuts??

Cheers!

LoSt180 · 05-06-2022, 08:36 AM

Quote:

Originally Posted by adey

Wow, thanks, that's a good find. Appreciate it!

Can you (anyone) think of any big brake clearance cars/spare tires that use the standard M12 cone-type lugnuts so I don't have to buy a spare set of Z34 lugnuts??

Cheers!

The RC350 F-Sport has an 18" spare and those have big front brakes roughly the same size as the Akebonos. Has the same bolt pattern but Lexus has a smaller hub bore, so may not actually fit. It's the yellow 5 spoke one if you go searching info on it.

AKADriver · 05-06-2022, 01:30 PM

Lancer Evo X has an 18" steel spare and Brembos. That's a 67.1 hub bore.

05-04-2022, 11:02 PM	#1
adey Post Whore! Join Date: Mar 2002 Location: Hong Kong Posts: 3,072 Trader Rating: (0) Feedback Score: 0 reviews	Z34 spare tire for WGNC34 BBK Hi all! I am trying to solve a spare tire problem. SHORT VERSION: Will the Z34 spare wheel/tire clear 360mm discs and OEM BREMBO calipers on my WGNC34? LONG VERSION: I have a Stagea WGNC34 (RB26DETT/AWD) with the BIOT big brake disk kit. This keeps the OEM BREMBO 4-pot calipers but up-sizes the brake discs to 2-piece 360mm units (OEM is 324mm). Naturally, I test-fitted the spare tire that came with the car, and it won't clear the brakes. However, I do like the idea of having a spare, since the car is a daily, and I am fine to haul around a few extra pounds for the peace of mind. So, I started looking for alternatives. Of course, first thought was: "What is the narrowest 17" TE37 made?" but I quickly realized that even if they made a 176 wheel, it would stick out too far in the spare tire slot. That got me thinking about other OEM spares... and the Z34 came up. It has a 355mm OEM brake disk with those giant Akebono/Nissan calipers, and I figure they should fit my need... but I've never seen a photo of the Z34 on a spare tire, let alone details of how the brake clearance looks from behind the wheel. So, would anyone here volunteer to test fit their Z34 spare on the front of their car and take some detailed photos of the caliper clearance for me?? Or could you make a prediction on whether or not this would fit my needs?* Thanks!! (I never thought I would be posting something almost specific to the Z34, but here we are!) And yes, I realize I would need to keep a set of 5 Z34 lugnuts with the spare wheel, since the mounting face is most likely different from my existing wheels.

05-04-2022, 11:22 PM	#2
adey Post Whore! Join Date: Mar 2002 Location: Hong Kong Posts: 3,072 Trader Rating: (0) Feedback Score: 0 reviews	A little bit of supplementary info: WGNC34 Spare: 174 145/70-17 (Dia: 24.99") Z34 Spare: 174 145/80-17 (Dia: 26.13") That makes the Z34 spare's over-all diameter of the tire about 1" wider/taller than the WGNC34's! I may have a spare tire trunk space fitment problem lol Will have measure that up later, though... __________________ Instagram: @SX180HKG

05-05-2022, 11:12 PM	#4
adey Post Whore! Join Date: Mar 2002 Location: Hong Kong Posts: 3,072 Trader Rating: (0) Feedback Score: 0 reviews	Wow, thanks, that's a good find. Appreciate it! Can you (anyone) think of any big brake clearance cars/spare tires that use the standard M12 cone-type lugnuts so I don't have to buy a spare set of Z34 lugnuts?? Cheers! __________________ Instagram: @SX180HKG

05-05-2022, 08:03 AM	#3
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 42 Posts: 3,475 Trader Rating: (1) Feedback Score: 1 reviews	If you wanted to go full baller with a new wheel, there's a company called Modern Spare that makes new 18x4" alloy spares for various new cars that don't come with factory spares with different tire diameter options. They say it clears the Akebono 4-pots on the Infiniti Q50/Q60 but needs a spacer for the Brembo 6-pots on the R35 GT-R and Mustang GT350. https://modernspare.com/product-cate...-kits/5x114-3/ Edit: apparently the 370Z with Akebonos also uses an 18" alloy spare with a 145/70R18, not 17". https://www.redlineautoparts.com/nis...el-18x4-7z010/

05-06-2022, 01:30 PM	#6
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 42 Posts: 3,475 Trader Rating: (1) Feedback Score: 1 reviews	Lancer Evo X has an 18" steel spare and Brembos. That's a 67.1 hub bore.