Is MIPS or rotational protection more important in an e-bike helmet than a regular bike helmet?

Yes, the case for rotational protection is stronger in e-bike helmets than in conventional bicycle helmets. Higher speeds generate greater rotational forces in oblique impacts, which are the most common type of cycling crash. MIPS and similar systems reduce rotational acceleration by 10–35%, which can meaningfully reduce the risk of traumatic brain injury. Given that e-bike crashes occur at higher speeds with greater impact energies, the additional protection from rotational mitigation systems provides a proportionally greater safety benefit. We strongly recommend choosing an e-bike helmet with MIPS or an equivalent rotational protection system.