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Reclining Bucket · New-Gen Flagship
STRADIA III has a newly-designed monocoque body shell with bone frame and ZETA IV designed by 3D-CAD. Seat rigidity and strength are greatly improved compared to STRADIA II. The new reclining mechanism and one-touch reclining lever aim at maximal operability, convenience, and durability — achieving more reliable holdability and comfort by suppressing backlash and vibrations through stepwise adjustments.
STRADIA III has a newly-designed monocoque body shell with bone frame and ZETA IV designed by 3D-CAD. Seat rigidity and strength are greatly improved compared to STRADIA II. The new reclining mechanism and one-touch reclining lever aim at maximal operability, convenience, and durability — achieving more reliable holdability and comfort by suppressing backlash and vibrations through stepwise adjustments.
A belt hole for a 6-point harness is newly installed on the back of the seat, which uses specially-designed high-density urethane foam for its seat and thigh cushions. STRADIA III is a new-generation reclining seat that combines the holdability required for circuit driving with the convenience and comfort required for everyday use at a high level.
Available in three colors — Black, Red, Gradation Logo — two shells (Silver FRP + Super Aramid Carbon), and two cushion types (Standard + Low).
Specially-designed, high-density molded urethane for seat + thigh cushions applies body pressure evenly across the flat seat surface for a strong hold and reduced fatigue. Doesn’t easily compress, highly durable. In addition to the standard type, a low-type thigh cushion with 2/3 thickness is also available.


Large-diameter belt hole compatible with FHR (HANS) systems, plus a 6-point harness belt hole (long-requested by STRADIA users) is newly-installed at the bottom of the seat. Drivers can enjoy circuit driving and other motorsports in greater safety.


Dimensions: Monocoque shell + bone frame · one-touch reclining lever · FHR + 6-point harness belt holes · standard or low thigh cushion
STRADIA III spec sheet — 3 colors × 2 shells × 2 cushion types = 12 unique SKUs. G71 prefix = Standard cushion, G72 prefix = Low cushion. Your current selection: G72GSC is highlighted below.
| Shell Material | Color | Product No. | Cushion | Weight | Cover | FIA |
|---|---|---|---|---|---|---|
| Silver FRP | Black | G71ASF | Standard | 14.0 kg | Flame-retardant fabric | |
| Super Aramid Carbon | Black | G71ASC | Standard | 14.0 kg | Flame-retardant fabric | |
| Silver FRP | Red | G71BSF | Standard | 14.0 kg | Flame-retardant fabric | |
| Super Aramid Carbon | Red | G71BSC | Standard | 14.0 kg | Flame-retardant fabric | |
| Silver FRP | Gradation Logo | G71GSF | Standard | 14.0 kg | Flame-retardant fabric | |
| Super Aramid Carbon | Gradation Logo | G71GSC | Standard | 14.0 kg | Flame-retardant fabric | |
| Silver FRP | Black | G72ASF | Low | 14.0 kg | Flame-retardant fabric | |
| Super Aramid Carbon | Black | G72ASC | Low | 14.0 kg | Flame-retardant fabric | |
| Silver FRP | Red | G72BSF | Low | 14.0 kg | Flame-retardant fabric | |
| Super Aramid Carbon | Red | G72BSC | Low | 14.0 kg | Flame-retardant fabric | |
| Silver FRP | Gradation Logo | G72GSF | Low | 14.0 kg | Flame-retardant fabric | |
| Super Aramid Carbon | Gradation Logo | G72GSC | Low | 14.0 kg | Flame-retardant fabric |
You'll get an instant confirmation email with your part details and invoice. We source from a network of authorized suppliers across the country, so lead times vary by brand and part type — we'll send a tracking number the moment your parts move.
Made-to-order builds — carbon fiber bodywork, fabricated systems, custom finish work — run longer than off-the-shelf items because they're built per order. You'll get progress updates throughout the build.
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