Unexpectedly light
The 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 the 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 line-up. Its aerodynamic efficiency saves riders 10.1 watts of power and more than one bike length during a final sprint versus the Velocis in a standard one-hour test at 45 km/h.
Cool is fast
Insight from computational fluid dynamic analysis helped optimise 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, the Ballista features a single-lace, 360° BOA® fit system with two lace height positions and three yoke positions – offering complete customisation.
Secure storage
The Ballista’s rubberised side vents make it easy to stow away your sunglasses when you’re not wearing them.
Shop sunglassesA clear view
The Ballista features a bevelled 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
The 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?