Arai · Arai XD
Arai XD-5
Quick Facts at a Glance
Verified Safety Snapshot
How this helmet’s verified certifications map to recognized safety homologations and crash testing.
Safety standards compliance is based on official manufacturer documentation and public safety laboratory test results. Always verify regional compliance labels on the physical helmet prior to use.
Verified Fit & Sizing Guide
Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.
Arai's 5 shell sizes ensure the most precise external-to-internal proportion. The FCS cheek pads can be custom tuned by an Arai dealer for a bespoke fit.
How to measure
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.
Design Concept & Background
"Safety is our business"
Arai XD-5は、Araiの伝説的な手作業成形PB-SNC2シェルを採用したプレミアムなデュアルスポーツヘルメットです。取り外し可能なバイザー、VASフェイスシールド、そしてアドベンチャーカテゴリーで最高レベルの精密なフィット感を実現する5サイズのシェルを備えています。
Arai XD-5 は、Arai により高剛性 Helm 保護システムとして設計され、グラスファイバー複合シェル 製の構造シェルを採用しています。この先進的な積層構造は、衝撃減速時に運動エネルギーを段階的に分散・吸収し、外層ラミネート全体に応力を分散させることで、多密度内部EPSライナーへの局所的な変形伝達を最小限に抑えます。
ECE 22.06 / DOT 規格に適合し、厳格な線形減速度基準および斜め衝撃試験をクリアすることで、回転加速度による脳損傷リスクを低減する構造となっています。衝撃吸収性能やアンビル試験の詳細については、当社の ECE 22.06 vs DOT vs SNELL ヘルメット安全規格比較ガイド をご覧ください。
内装エルゴノミクスは インターミディエイト・オーバル（中間楕円型） 頭骨プロファイルに沿って成形されており、頭頂部および側頭部への過度な圧迫点を防ぎつつ、頬骨弓に沿った均一なホールド感を提供します。最適な装着安定性と馴染ませ方については、頭部形状プロファイルと頭骨フィッティングガイド および チークパッドの密度と馴染ませプロトコル をご確認ください。
走行時のキャビン静粛性と整流性能は、時速100kmにおいて約 92.5 dB を記録。内部EPSのベンチレーションダクトと層流エアロダイナミクスにより風切り音を抑制しています。熱疲労や紫外線に対するシェル素材の耐久性については、カーボン vs グラスファイバー vs ポリカーボネート複合シェル比較 で詳しく解説しています。
車両との親和性・推奨ライディングスタイル： 安定したダウンフォースと額部吸気口を備え、ワインディングから高速ツーリングまで幅広いライディングに対応します。総重量 1700 g のバランス設計により重心位置が最適化され、長時間の巡航時でも頸椎への負担を大幅に軽減します。車種ごとのウインドスクリーン適合については、当社の モーターサイクル適合モデル一覧 をご参照ください。
Arai XD-5 represents an empirical engineering balance between aerodynamic stability and high-absorption cranial protection. Developed under Arai's strict quality assurance standards in Japan, the shell profile is precision-molded to minimize high-velocity turbulent drag while maintaining comprehensive multi-axis impact attenuation.
Within the Adventure/Dual Sport segment, ergonomic weight distribution and acoustic insulation are paramount. The chassis geometry is tailored to distribute mass directly above the cervical pivot axis, counteracting high-speed buffeting and minimizing long-distance rider fatigue. Inspect the verified laboratory telemetry and structural analysis below for detailed performance parameters.
Key Highlights:
Rider Profile & Intended Use
購入先
| 販売店 | 価格 | Availability | |
|---|---|---|---|
| Amazon (US) | 現在の価格を確認 | サイトで見る | 価格を確認 → |
価格履歴とトレンド
ℹ️ Helmetsanは、独立したオートバイの安全性・意思決定エンジンです。価格を確認したり、小売店のリンク経由で購入したりすると、追加費用なしでHelmetsanがアフィリエイト報酬を受け取る場合があります。
Product Concept & Specifications
Arai (Japan)Engineering & Biomechanical Safety Analysis
The Arai XD-5 is engineered as a high-integrity Adventure/Dual Sport protective system, utilizing a structural shell constructed from PB-SNC2 (Super Fiber, Organic Fiber, Fiberglass). This structural layup is engineered to provide progressive kinetic energy dissipation during impact deceleration, distributing localized shock across outer lamina layers while minimizing deformation transfer into the internal multi-density EPS liner.
Certified to ECE 22.06, DOT, Snell M2020 protocols, the architecture is subjected to rigorous linear deceleration limits and oblique impact evaluations to mitigate rotational acceleration forces associated with diffuse axonal injury. For a deeper breakdown of rotational thresholds and impact testing speeds, consult our ECE 22.06 vs DOT vs SNELL engineering benchmark.
Internal geometry follows a Intermediate Oval cranial profile, designed to mitigate focal pressure hot spots across the parietal ridges while maintaining uniform radial clamping pressure along the zygomatic arch. Riders seeking optimal retention stability and break-in guidance should review the cranial aspect ratios and head shape guide as well as our 3D cheek pad density protocol.
Shell composite integrity and acoustic sealing are further optimized through channelized EPS porting and aerodynamic laminar profiling. To learn how shell composites resist stress cracking under prolonged environmental cycling, inspect the composite material comparative matrix.
Fit & Shell Structure
Intermediate Oval Shape
Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.
Safety & Certifications
Acoustics & Aerodynamics
Technology & Convenience
Interactive Size & Fit Finder
Arai's 5 shell sizes ensure the most precise external-to-internal proportion. The FCS cheek pads can be custom tuned by an Arai dealer for a bespoke fit.
How to measure
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.
Part numbers
| Product style | MFR. product # | SKU | Availability |
|---|---|---|---|
| Solid Frost Black / MD | — |
ARAI-XD5-FBK-MD | in_stock |
Geo Pricing & Availability
| Country | Price | Availability | Source | Updated |
|---|---|---|---|---|
| US | 739.95 USD | in_stock | authorized_distributor | 2026-02-20 |
| EU | 699 EUR | in_stock | authorized_distributor | 2026-02-20 |
| IN | 74990 INR | import_only | grey_market | 2026-02-20 |
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Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.