Details
An aerodynamic road bike helmet that is undeniably fast, yet surprisingly light, cool, and comfortable.
Less wind. More win.
When speed is your top priority and every watt counts, reach for the helmet that'll cut through the wind to save you seconds. Ballista is Trek's fastest, most aerodynamically-advanced helmet.
Ballista is light, cool, comfortable, and engineered with a fully-integrated Mips Air safety system that's designed to help keep you safer.
Product details:
- Trek's fastest, most aerodynamic helmet will save big watts and shave crucial seconds
- An excellent ventilation system makes this aero helmet surprisingly cool and comfortable
- The Mips Air system is light, cool, and designed to help reduce rotational forces
- The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit
- Rubberized sunglasses docking port provides secure and easy-to-use storage
- Beveled front edge improves field of view while riding on the hoods and in the drops
- 5-STAR Virginia Tech safety rating
- Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over
Size | Small | Medium | Large |
---|---|---|---|
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 |
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Weights are based off pre-production products at time of publication. Weights may vary in final production.
Size | Circumference |
---|---|
Small | 51 - 57 cm |
20" - 22" | |
Medium | 54 - 60 cm |
21" - 24" | |
Large | 58 - 63 cm |
23" - 25" |
Part Numbers
Option | UPC | MPN | Store SKU |
---|---|---|---|
White/Nautical Navy / Small | 768682582381 | 5279724 | HEL51219684C |
White/Nautical Navy / Medium | 768682582725 | 5279725 | HEL52196144C |
White/Nautical Navy / Large | 768682582749 | 5279726 | HEL51630456C |
Black / Small | 768682601488 | 5279718 | HEL36748897C |
Black / Medium | 768682601600 | 5279719 | HEL37813796C |
Black / Large | 768682601341 | 5279720 | HEL36697321C |
White / Small | 768682562369 | 5279721 | HEL36485222C |
White / Medium | 768682240731 | 5279722 | HEL37270862C |
White / Large | 768682562222 | 5279723 | HEL36798143C |
Purple Flip / Small | 768682582565 | 5279727 | HEL41548214C |
Purple Flip / Medium | 768682476147 | 5279728 | HEL42938714C |
Purple Flip / Large | 768682582404 | 5279729 | HEL41587418C |