Road Bike Helmet Selection: Understanding Safety Certifications like MIPS and WG11

Introduction

“Wear a helmet” is a cycling rule everyone knows, but most riders still choose helmets based on intuitive criteria like “good looks,” “good ventilation,” or “well-known brand,” with almost no understanding of a helmet’s actual level of protection. In reality, two helmets that look similar and cost about the same can perform drastically differently in impact tests.

This article will help you understand various safety certification standards, grasp the true meaning of technologies like MIPS, and help you choose a helmet within your budget that best protects your head.

Bicycle Helmet Certification Standards

Overview of Major Certifications by Region

Currently, Taiwanese regulations require bicycle helmets to meet the CNS 13371 standard (referenced from EN1078), but most imported helmets sold in the market carry CE or CPSC certification, all of which meet basic legal requirements.

MIPS Technology: The Key to Solving Rotational Forces

Why Is Rotational Force More Dangerous Than Linear Impact?

Traditional helmet testing mainly simulates direct linear impacts, but in real accidents, the head often hits the ground at an angle, generating rotational acceleration. The shearing damage rotational force causes to the brain is the primary cause of concussions and chronic traumatic encephalopathy (CTE).

How MIPS Works

MIPS (Multi-directional Impact Protection System) is a technology developed by the Royal Institute of Technology in Sweden:

• A low friction layer is added between the helmet shell and the head
• Upon impact, the outer shell can rotate 10–15 mm relative to the head
• This slight displacement absorbs approximately 10–15% of the rotational force, significantly reducing shearing stress on the brain

MIPS itself is a component licensor and does not manufacture helmets. Its technology appears in products from mainstream brands such as Giro, Bell, POC, Bontrager, and Lazer.

Comparison of Similar Technologies

Virginia Tech (WG11) Rating System

The Most Objective Third-Party Testing

The Sports Engineering Laboratory at Virginia Tech University has been building an independent helmet rating system (commonly known as the WG11 score) since 2017, with testing that is more comprehensive than traditional certifications:

• Test angles: Linear (90°) + oblique (45°, 60°) impacts
• Test speeds: Simulates impacts at multiple speeds
• Scoring system: STAR 1–5 stars (higher is safer) or a specific numerical score (lower is better)

More than 250 helmets have been tested, with results publicly available on the Virginia Tech Helmet Ratings website.

Key Findings

• Helmets with MIPS perform better overall than the same model without MIPS
• Expensive helmets are not necessarily safer than mid-priced ones—some helmets priced at NT$2,000–4,000 outperform helmets costing over NT$10,000
• Rotational force protection is the biggest differentiating factor affecting ratings

Practical Buying Guide

Head Shape Fit: Differences Between Eastern and Western Head Shapes

Bicycle helmet shapes are mainly divided into:

• Round Oval: Shorter front-to-back distance, suited to Asian head shapes
• Oval/Long Oval: Longer front-to-back distance, the primary design for European and American brands

Asian riders are advised to try helmets on in person before purchasing, or to choose brands that offer sizing recommendations (such as OGK Kabuto, MET, and other Asian-fit options).

Budget Allocation Recommendations

Practical Advice

• Replace after every fall: The EPS foam in a helmet has its structure compromised after impact; no visible cracks on the outside does not mean it still offers protection
• Do not exceed 5–7 years: UV, sweat, and oils degrade materials; replace regularly even without any falls
• Wear it correctly: The brim should sit two finger-widths above the eyebrows, side straps should form a V shape, and after tightening the chin strap, two fingers should fit underneath
• Do not buy second-hand helmets: There is no way to confirm whether they have been involved in a crash

Conclusion

A helmet is the one piece of rider gear where you “should never cut corners.” When choosing a helmet, remember three principles: meet certification standards, fit your head shape, and check Virginia Tech ratings. The difference a truly protective helmet makes in a critical moment is not how fast you ride, but whether you make it home in one piece.

Related Reading

• Bicycle Helmet Buying Guide: MIPS Technology and Safety Certification Explained
• Comprehensive Bicycle Helmet Review: Balancing Aerodynamics, Ventilation, and Weight
• Bicycle Helmet Buying Guide: Key Factors of MIPS Technology, Ventilation Design, and Weight
• Bicycle Helmet Buying Guide: Three Key Considerations—MIPS, Aerodynamics, and Ventilation