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Trek Ballista Mips – Performance for the Podium
The product of extensive research and development in the pursuit of racing faster, Ballista is Trek’s fastest and most aerodynamically advanced helmet. With a suite of pro-level features like the Mips Air safety system and the customizable BOA fit system, Ballista is the go-to helmet for the days when speed is the top priority.
Best aero helmet overall
"...a helmet I absolutely loved as soon as I took it out of the box...incredibly light...excellent glasses retention…"
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"An excellent aero road helmet"
"As far as aero helmets go, it ticks all the right boxes, with an optimised shape, a comfortable fit, a competitive weight and excellent safety credentials."
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"A winning combination"
"This lid will help to elevate your racing and riding, offering an impressively well vented aerodynamic option that won’t feel claustrophobic..."
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"As cool as a standard road helmet"
"...its latest design makes it feel more like one of the lightest and most comfortable standard-shaped road helmets we’ve ever tested."
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All your favorites, all in one place
Get all your favorite apparel from over 80 of the world's best cycling brands delivered right to your doorstep or local Trek retailer when you shop our curated online collection. If you're not 100% satisfied, you can return your purchase within 30 days for a full refund.
Shop all gearHow to ride safer
Want to do more than wear a helmet? Check out this guide to riding safer.
Learn moreHow to clean your bike helmet
To ensure your bike helmet looks and performs its best, it's important to properly clean and care for it. Check out our simple guide to learn how to maintain your bike helmet. It's easy to do and takes little time!
Read moreProduct features
Our fastest helmet ever
Ballista is the fastest helmet in Trek's lineup. Its aerodynanic 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.
Unexpectedly light
Ballista is light. At 275 grams, its minimalistic, low-profile design makes for a faster helmet that's lighter than ever before.
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
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.
A 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.s.
Virginia Tech 5-STAR Rating
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.
Crash Replacement Guarantee
With our Crash Replacement Guarantee, we will provide you with a free replacement helmet if it is involved in a crash within the first year of ownership. Simply contact us or your local retailer with the crashed helmet, original sales receipt, details of the incident, and a return address for your replacement.
Learn more30-Day Unconditional Guarantee
If for any reason you're not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.
Learn moreHelmet Fit and Sizing
For your helmet to do its job, it's important that it's sized properly and fits well. Reference our sizing guide at the link below to find your ideal size and see how Bontrager helmets are intended to fit.
Learn moreOur helmets build the future
$1 from the sale of every Bontrager helmet in North America supports PeopleForBikes, which provides guidance, a rating system, a leadership conference, and professional support for transforming cities throughout the United States in the ongoing effort of becoming a bicycle friendly nation.
Learn more| Size | S | M | L |
|---|---|---|---|
| Circumference | 51-57cm | 54-60cm | 58-63cm |
| Fit system | BOA® | BOA® | BOA® |
| Pad material | Moisture wicking pads | Moisture wicking pads | Moisture wicking pads |
| Buckle type | Lightweight buckle | Lightweight buckle | Lightweight buckle |
| Includes | Crash Replacement Guarantee, NoSweat pad and travel bag | Crash Replacement Guarantee, NoSweat pad and travel bag | Crash Replacement Guarantee, NoSweat pad and travel bag |
| Weight | 250g | 275g | 295g |