Volk ZE40X on 2025 GX550 OT

[m32]

Just received the hub rings. The rings fit pretty well inside the center caps.

Hoping this setup will allow the mounting of both center caps and hub rings.

Appreciate your post... is there some play with the 106 to 95.1 that you installed?

I am starting to compile what I need to install my te37xts I just received and was wondering about how the centercap/hub ring situation will be. I bought the 112, 110 and 108 to 95.1 hub ring off of Amazon to see which one will fit snug. Will report back

Edwin

 

[nonamex]

Appreciate your post... is there some play with the 106 to 95.1 that you installed?

I am starting to compile what I need to install my te37xts I just received and was wondering about how the centercap/hub ring situation will be. I bought the 112, 110 and 108 to 95.1 hub ring off of Amazon to see which one will fit snug. Will report back

EdwinView attachment 14283

Hey Edwin,

I believe the TE37XT uses the same center cap as the ZE40X so the diameter is 106 mm. You will need the 106 mm hub ring to fit the center cap as anything larger will not allow you to use the latter. Hope this helps.

 

[m32]

Hey Edwin,

I believe the TE37XT uses the same center cap as the ZE40X so the diameter is 106 mm. You will need the 106 mm hub ring to fit the center cap as anything larger will not allow you to use the latter. Hope this helps.

Sheesh... I should've just measured it from the get-

go... you are absolutely correct!

 

[jpto]

Good points. Hopefully Rays does take that into account with the new design and does more than just enlarge the bores since the root issue is adequate thread engagement. Even if they only did enlarge the bores, wouldn’t “mated” lug nuts that had the correct length and thickness through the part resolve that concern? That said, my preference would be a solution that does not require any proprietary lugs.

Whatever they do, I think I’d feel better with running M14 studs rather than 2mm thinner studs.

You can still run M14 studs on current Rays wheels, most of the wheels that fit trucks are 15mm holes. The issue is Toyota puts relatively short lug studs on their trucks because the style of wheel that Toyota uses a lug nut that extends into the wheel. You can't run ET cone style lug nuts on Rays because the lug holes are too narrow.

I doubt Rays is going to alter the width of the hub interface portion of their wheels, if they could they would have done it on their current wheels to save weight. I suspect the enlarging the lug holes is only to accommodate ET cone style lug nuts

 

[incognito.gx]

Killing myself for selling my Project Kics r40 lugs

 

[cjallstar]

Hey Edwin,

I believe the TE37XT uses the same center cap as the ZE40X so the diameter is 106 mm. You will need the 106 mm hub ring to fit the center cap as anything larger will not allow you to use the latter. Hope this helps.

I’m so curious as to how you installed this and how it worked, I must be special because I can’t figure it out. I’m looking to run some JDM Bradley forged wheels that have a hub diameter of 110.3; I want to run rings so that I don’t get vibration, and therefore was told I couldn’t use caps. Clearly you figured out a workaround here and I’d love to mimic it as I don’t want to have the hub exposed if I can avoid it.

Is it as simple as running the required rings, in my case 110 to 95, and buying a cap that fits over the 110 ring? I thought they were all push through caps and wouldn’t hold the hub or ring from the front?

 

[nonamex]

I’m so curious as to how you installed this and how it worked, I must be special because I can’t figure it out. I’m looking to run some JDM Bradley forged wheels that have a hub diameter of 110.3; I want to run rings so that I don’t get vibration, and therefore was told I couldn’t use caps. Clearly you figured out a workaround here and I’d love to mimic it as I don’t want to have the hub exposed if I can avoid it.

Is it as simple as running the required rings, in my case 110 to 95, and buying a cap that fits over the 110 ring? I thought they were all push through caps and wouldn’t hold the hub or ring from the front?

Are your caps push through or bolt on/snap on? If the former then you will need to measure the diameter of the cap.

Use the diameter to determine which hub ring to get. Do not get the hub ring for the hub bore otherwise the center cap will not fit.

 

[BLK GX]

maybe a mold change is needed? otherwise for sure it would be secondary op process

 

[jpto]

I just finished installing the Rays center caps with the 106 mm to 95.1 mm hub rings. It worked!

Removed the 112 mm to 95.1 mm rings. Here are pictures of the OEM studs compared to the extended ones as well as the finished product. Since I didn’t perform the install, there are no pictures of the extended studs mounted on the wheel.

How’s the hub ring inside the center cap working out? Any vibrations?

 

[nonamex]

How’s the hub ring inside the center cap working out? Any vibrations?

Working out well. No vibrations at speeds exceeding 65 MPH. Center caps are tight with the hub rings. A Rays reseller had mentioned to me that his center caps were not tight and noticed that I inserted hub rings inside the caps so he probably did the same.

 

[CookieMunster]

Hello,

First, I appreciate seeing others take a safer, more deliberate approach to fitting the ZE40X on the GX550 rather than relying on minimal thread engagement (e.g., five turns). I wasn’t fully comfortable with that approach from a safety standpoint.

I had considered using ARP wheel studs (M14 specification), but I wasn’t certain about fitment. It’s reassuring to see that Kyo-EI studs have been successfully used instead.

For those running the Kyo-EI extended studs (SBLC version), I noticed reports of achieving approximately 9.5 full turns of thread engagement, which is excellent. Could you please clarify whether this result is with the ZE40X wheels redrilled for M14 studs, or if it’s based on the factory M12 specification?

I’m also interested in pairing this setup with my R40 Iconix lug nuts, as I have a spare set available. I wanted to ask these questions in advance to ensure compatibility and avoid any unexpected issues.

Thank you in advance for your time and insight. Happy Holidays!

 

[Jin_Chloe]

Quick question—for my winter setup, if I install extended wheel studs, will the OEM wheels and factory lug nuts still seat properly?

 

[kulahi]

Quick question—for my winter setup, if I install extended wheel studs, will the OEM wheels and factory lug nuts still seat properly?

Pretty sure your stock lug nuts will bottom out on the extended studs. Simple enough to test.

 

[jpto]

Hello,

First, I appreciate seeing others take a safer, more deliberate approach to fitting the ZE40X on the GX550 rather than relying on minimal thread engagement (e.g., five turns). I wasn’t fully comfortable with that approach from a safety standpoint.

I had considered using ARP wheel studs (M14 specification), but I wasn’t certain about fitment. It’s reassuring to see that Kyo-EI studs have been successfully used instead.

For those running the Kyo-EI extended studs (SBLC version), I noticed reports of achieving approximately 9.5 full turns of thread engagement, which is excellent. Could you please clarify whether this result is with the ZE40X wheels redrilled for M14 studs, or if it’s based on the factory M12 specification?

I’m also interested in pairing this setup with my R40 Iconix lug nuts, as I have a spare set available. I wanted to ask these questions in advance to ensure compatibility and avoid any unexpected issues.

Thank you in advance for your time and insight. Happy Holidays!

There's no need to redrill with the extended studs. People suggested redrilling to accommodate ET lug nuts, I'm not running ZE40X but I get about 9.5/10 turns on a different set of Rays

 

[jpto]

Quick question—for my winter setup, if I install extended wheel studs, will the OEM wheels and factory lug nuts still seat properly?

not sure, I'm running aftermarket wheels for both my winter and summer setup. I did read on the Tundra forums that people were able to run their stock wheels with SBLC but YMMV

 

[pnw_gxot]

does anyone know if Rays has removed the need to use extended lugs on their 2026 ZE40X? I just acquired a 26' GXOT and have been looking at the ZE40X pairing for awhile.

 

[IntrinoX/BBO]

does anyone know if Rays has removed the need to use extended lugs on their 2026 ZE40X? I just acquired a 26' GXOT and have been looking at the ZE40X pairing for awhile.

For those that say it is not safe, it is best to change out the OEM lug studs to longer ones. But Rays, doesn't make their wheels to accept ET-style lug nuts.