Smith

Jetstream TT Helmet

What Our Gearhead® Experts Are Saying:

"I raced the Jetstream TT in a triathlon last season and the combination of MIPS and Koroyd gave me real confidence without adding bulk I could feel at speed. The magnetic visor swap between the clear and ChromaPop lens took seconds in transition, and the VaporFit system dialed in the fit precisely enough that the helmet never shifted during the bike leg."

When the gun goes off and the clock starts running, every detail of the setup matters, and the Smith Jetstream TT Helmet is built to make sure the helmet is never the thing slowing you down. From the aero tuck on a flat TT course to the final kilometers of a triathlon bike leg, this helmet stays locked in and out of the way while doing serious work behind the scenes.

Smith engineered the Jetstream TT around a polycarbonate shell with a Koroyd liner that absorbs impact energy more efficiently than traditional foam alone, working alongside MIPS to reduce rotational forces during a crash. Five ventilation ports keep airflow moving across the head during high-output efforts, while the low-profile y-strap divider supports the aerodynamic silhouette without creating drag. The VaporFit adjustment system dials in a 270-degree fit so the helmet stays secure through position changes and long race efforts. A magnetic visor makes lens swaps fast and intuitive — the included clear and ChromaPop lenses cover everything from overcast morning starts to bright midday racing — and ionic anti-odor lining keeps the interior fresh across training blocks and back-to-back race days.