Is the BRIDE ZETA IV NUGRAIN FIA approved?

No. BRIDE supplies this seat without an FIA certification label, so it is not eligible for competition classes that require an FIA homologated seat. It is built to the Japanese safety standard compliant specification and passes vehicle inspection when fitted on BRIDE rails. Drivers who need homologation should look at a ZETA IV variant that carries the label.

What is NUGRAIN and how does it differ from fabric or suede?

NUGRAIN is a high-touch synthetic leather developed by Achilles Corporation and used here as the seat skin. It reproduces the feel of nubuck closely enough to read as a genuine leather product, while behaving like a synthetic in service: it resists soiling and wipes clean, so it suits a car that gets driven rather than trailered. NUGRAIN is a registered trademark of Achilles Corporation.

What shell does this seat use?

A carbon shell. BRIDE specifies the ZETA IV NUGRAIN with a carbon shell rather than the silver FRP unit used on the standard model, which is why the back of the seat shows a visible weave. Some distributor material describes the shell as FRP, or as FRP and carbon together. BRIDE itself lists carbon, and that is what is quoted here.

Which seat rails fit this seat?

BRIDE lists rail types FO, FB, FK, FG, IG, FT, LG, LF, FX and HR. The correct type depends on the vehicle, the seating position, and whether a low or standard mounting height is wanted. Rails are vehicle specific and sold separately, so confirm the type against the chassis before ordering. We stock every type on that list except LG and HR.

How big is this seat and what does it weigh?

BRIDE publishes the weight as approximately 7.6 kilograms, or about 16.8 pounds, and states that figure as a reference value. The shell is the standard ZETA IV unit, so it measures 460mm across the base, 560mm across the shoulder pads, 890mm tall and 710mm deep. Cockpit clearance and rail fitment match any other ZETA IV.

Can this seat be used on the street?

Yes. BRIDE builds it as a safety standard compliant model, so it passes Japanese vehicle inspection when fitted on BRIDE vehicle specific rails. The seat also carries an antibacterial treatment covering sanitizing and deodorizing, which matters more on a street car than on a track car. Holding performance comes from the ZETA IV shell, so nothing is given up for the road rating.

Description

Additional Info

Shipping policy

BP PRICING DIFFERENCE

Reviews

Product Inquiry

Description

BRIDE ZETA IV NUGRAIN Bucket Seat in Charcoal Gray

The BRIDE ZETA IV NUGRAIN takes BRIDE’s standard full bucket platform and re-skins it in NUGRAIN, a high-touch synthetic leather developed by Achilles Corporation. The material reproduces the hand of nubuck closely enough to read as genuine leather, but because it is a synthetic it resists the marks and grime that shorten the life of a fabric or suede cover in a daily-driven car, and it wipes clean. The skin is finished in charcoal gray over a carbon shell, and the seat carries an antibacterial treatment that also works against odor. Underneath the cover, nothing changes: the shell shape, LOWMAX geometry, and holding performance are the current ZETA IV. BRIDE opened orders on 16 September 2026.

The ZETA Series

ZETA is the standard shape of the BRIDE full bucket seat, derived from ergonomics and the human skeleton, and it has been the best seller in the BRIDE full bucket range since 1990. The ZETA IV builds on the knowledge cultivated across the series and fits a wide spread of vehicle types without being tied to any single competition category. The shell shape and the vertical slits in the back cushion improve the fit from the headrest through the back and shoulders, holding a correct driving position over long stints, while the raised thigh design resists the submarine phenomenon (the occupant sliding forward and down) under hard braking or impact. Shoulder width is held to 560mm and the LOWMAX System, previously reserved for selected full bucket and reclining models, brings seat center in line with steering center across a far broader list of vehicles.

The NUGRAIN Skin

NUGRAIN is a high-touch synthetic leather developed by Achilles Corporation and adopted here as the seat surface. BRIDE gives three reasons for the change: the nubuck-like texture reproduces the feel of a genuine leather product very closely, the synthetic construction resists soiling and keeps maintenance simple, and the subdued color and restrained detailing lift the cabin a grade above a race fabric. The result is a full bucket seat that suits a car with a finished interior, where a suede or mesh cover would look out of place and would not survive daily use nearly as well. The seat is supplied in charcoal gray only, over a carbon shell, and carries an antibacterial specification covering both sanitizing and deodorizing. NUGRAIN is a registered trademark of Achilles Corporation.

Features

Antibacterial specification covering sanitizing and deodorizing
Carbon shell
Charcoal gray finish, the only color offered
Flame-retardant fabric used in the covering
LOWMAX System aligns seat center with steering center
NUGRAIN high-touch synthetic leather skin developed by Achilles Corporation
Nubuck-like texture that reads close to a genuine leather product
Raised thigh shaping resists submarining under hard braking
Resists soiling and wipes clean, unlike fabric or suede
Safety standard compliant model that passes Japanese vehicle inspection
Supplied without an FIA certification label
Vertical back cushion slits improve fit from headrest to shoulders
Made in Japan

Specifications

Series: ZETA
Base Model: ZETA IV
Color: Charcoal Gray
Shell: Carbon shell
Skin Material: NUGRAIN synthetic leather, developed by Achilles Corporation
Fabric: Flame-retardant
Width: 460mm (560mm at shoulder pads)
Height: 890mm
Depth: 710mm
Weight: Approximately 7.6kg (16.8lbs)
FIA Homologation: None

Compatible Seat Rails

Notes

Vehicle-specific seat rails (sold separately) are required for installation
BRIDE also lists rail types LG and HR for this seat. We do not stock either type; contact us if your vehicle needs one.
Sold as a single seat
The ZETA IV NUGRAIN is supplied without an FIA certification label and is not eligible for competition classes that require an FIA-approved seat
BRIDE has not published seat back protector compatibility for part number HA1NR2. If the seat is going in front of an occupied rear seat, contact us before ordering
Built and imported from Japan. For current lead times, contact us

Frequently Asked Questions

Is the BRIDE ZETA IV NUGRAIN FIA approved? No. BRIDE supplies this seat without an FIA certification label, so it is not eligible for competition classes that require an FIA homologated seat. It is built to the Japanese safety standard compliant specification and passes vehicle inspection when fitted on BRIDE rails. Drivers who need homologation should look at a ZETA IV variant that carries the label.
What is NUGRAIN and how does it differ from fabric or suede? NUGRAIN is a high-touch synthetic leather developed by Achilles Corporation and used here as the seat skin. It reproduces the feel of nubuck closely enough to read as a genuine leather product, while behaving like a synthetic in service: it resists soiling and wipes clean, so it suits a car that gets driven rather than trailered. NUGRAIN is a registered trademark of Achilles Corporation.
What shell does this seat use? A carbon shell. BRIDE specifies the ZETA IV NUGRAIN with a carbon shell rather than the silver FRP unit used on the standard model, which is why the back of the seat shows a visible weave. Some distributor material describes the shell as FRP, or as FRP and carbon together. BRIDE itself lists carbon, and that is what is quoted here.
Which seat rails fit this seat? BRIDE lists rail types FO, FB, FK, FG, IG, FT, LG, LF, FX and HR. The correct type depends on the vehicle, the seating position, and whether a low or standard mounting height is wanted. Rails are vehicle specific and sold separately, so confirm the type against the chassis before ordering. We stock every type on that list except LG and HR.
How big is this seat and what does it weigh? BRIDE publishes the weight as approximately 7.6 kilograms, or about 16.8 pounds, and states that figure as a reference value. The shell is the standard ZETA IV unit, so it measures 460mm across the base, 560mm across the shoulder pads, 890mm tall and 710mm deep. Cockpit clearance and rail fitment match any other ZETA IV.
Can this seat be used on the street? Yes. BRIDE builds it as a safety standard compliant model, so it passes Japanese vehicle inspection when fitted on BRIDE vehicle specific rails. The seat also carries an antibacterial treatment covering sanitizing and deodorizing, which matters more on a street car than on a track car. Holding performance comes from the ZETA IV shell, so nothing is given up for the road rating.

About BRIDE

BRIDE is a Japan-based manufacturer specializing in seats and rail components designed to sit closest to the driver, offering maximum protection in a collision. Their ASEA-accredited products meet full vehicle inspection standards and pass six rigorous safety tests covering seat back impact, head restraint performance, seat and belt mounting, and flame resistance. BRIDE is also the first Japanese company to receive FIA endorsement for its seats, with nine models approved for international competition. Every seat is built by hand in Japan using precision-engineered shells and technical fabrics, with all components sourced domestically to keep quality tightly controlled from start to finish. For BRIDE, “Made in Japan” reflects a long-held standard built on ingenuity, hand-built precision, and technical knowledge; qualities that make their seats a trusted choice in the demanding environment of motorsport.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Product Inquiry

First Name (*required)

Last Name (*required)

Your E-Mail (*required)

Telephone Number (*required)

Country (*required)

Vehicle Year / Make / Model (*required)

Please Explain What do you want to do with your vehicle

Additional Information (optional)

I agree to the terms & conditions and privacy policy and to have Bulletproof Automotive LLC contact me for promotion, marketing and other purposes via email, phone or SMS message.

BRIDE ZETA IV NUGRAIN Bucket Seat in Charcoal Gray [HA1NR2]

Guaranteed Safe Checkout

BRIDE ZETA IV NUGRAIN Bucket Seat in Charcoal Gray

The ZETA Series

The NUGRAIN Skin

Features

Specifications

Compatible Seat Rails

Notes

Frequently Asked Questions

About BRIDE

Reviews