The Troy Lee Designs SE4 helmet was once the company’s flagship for head protection with a style and fit that quickly become popular among dirt bike riders.
Though the new Troy Lee SE5 helmet offers the next generation of innovation, the SE4 remains a widely sought-after riding helmet which Troy Lee Designs continues to manufacture. Considered a moderately priced dirt bike helmet with high-end safety features the Troy Lee SE4 offers the acclaimed MIPS brain protection system, an innovative venting network and built-in comfort for all head sizes and shapes.
So how does it measure up on the track? Or trails? How about both.
MotoSport employee Ryan Forbes wears a 2021 Troy Lee Designs SE4 Polyacrylite helmet which he uses for track and trail riding on his 2016 Kawasaki KX250F. The SE4 comes in the mid-range composite shell, high-end carbon fiber or the budget friendly polyacrylate, a sturdy plastic material which is a bit heavier than composite or carbon fiber. All three models use MIPS with similar safety and comfort features.
The DOT-certified Troy Lee Designs SE4 Polyacrylite Helmet weighs 1500 grams and has 16 intake ports with six rear exhaust ports for optimal cooling. Forbes’ head measures 23 inches so he wears a size large and confirmed a true-to-size fit for an intermediate oval head shape. He previously owned the Colorway edition but now wears the Strike and had this review for a gear-on throttle-rolled experience of the Troy Lee Designs SE4 Polyacrylite helmet: