Unexpectedly light
Ballista is light. At 275 grams, its minimalistic, low-profile design makes for a faster helmet that's lighter than ever before.
Performance for the podium
Meet Ballista, Trek's most aerodynamically advanced helmet — the product of extensive research, development, and design in the pursuit of riding and racing faster.
Our fastest helmet ever
Ballista is the fastest helmet in Trek's lineup. Its aerodynamic efficiency saves riders 10.1 watts of power and more than one bike length during a final sprint versus Velocis in a standard 1-hour test at 45 km/h.
Cool is fast
Insight from computational fluid dynamic analysis helped optimize vent and channel design for more efficient airflow, creating a cool helmet.
Mips Air safety system
Less weight, seamless integration, improved sweat management, and rotational force management technology from Mips provide better performance and a better experience on the bike.
A better fit system
For that Goldilocks fit, Ballista features a single-lace, 360° BOA® fit system with two lace height positions and three yoke positions — offering complete customization.
Secure storage
Ballista’s rubberized side vents make it easy to stow away your sunglasses when you’re not wearing them.
Shop sunglassesA clear view
Ballista features a beveled edge above the brow that opens up your field of view and lets you easily see the road ahead — even when tucked in the drops.
5-STAR protection
Ballista has received a 5-STAR safety rating from Virginia Tech's third-party testing facility, an unbiased, industry-accepted assessment of the level of protection a helmet provides to a cyclist.
Love your lid
Think of this as a 30-day test ride. If for any reason you're not satisfied with your Trek helmet, we’ll take it back.
Shop BallistaPeace of mind
If your helmet is involved in a crash within the first year of ownership, we’ll replace it for free.
Get back on the roadHassle free returns
Returning your helmet is easy. We’ll provide you with a label and take the helmet back for free.
More infoHead to head
Which helmet is right for you?