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Trek Adventure Triangle Bag 1L on white background showing Trek logo, zipper, patterned Ultragrid material and black panels.
Close‑up of the Trek Adventure Triangle Bag open to show zipper, beige inner lining and GU snacks peeking out.
Flat lay of cycling essentials arranged beside the Trek Adventure Triangle Bag 1L to show its storage capacity.
Two Trek Adventure Triangle Bags mounted behind the head tube on a road bike during a ride.
Trek Adventure Triangle Bag 1L displayed with its mounting hardware and straps.
Rear view of the Trek Adventure Triangle Bag 1.3L showing the back pouch with accessories partially tucked inside.
Outdoor close‑up of a cyclist riding a Trek Project One bike with two black Trek frame bags mounted above the bar and another mounted below the bar.
Trek Adventure Triangle Bag 1.3L on a white‑grey background showing zipper, patterned material, black panels and visible pouch with straps.
Flat lay of cycling gear arranged beside the Trek Adventure Triangle Bag 1.3L to illustrate its storage capacity.
Trek Adventure Triangle Bag 1.3L displayed with its mounting accessories and hardware.
Rear view of the Trek Adventure Triangle Bag 1.3L showing the back pouch with cycling gloves and accessories partially tucked inside.
Trek Adventure Triangle Bag 1.6L front view showing zipper, pouch, mixed materials and stitched rectangular Trek logo patch.
Flat lay of the Trek Adventure Triangle Bag 1.6L with a variety of cycling gear that fits inside the pouch.
Trek Adventure Triangle Bag 1.6L displayed with straps and mounting hardware.
Rear view of the Trek Adventure Triangle Bag 1.6L showing the back pouch with cycling gloves and accessories inside.
Trek Adventure Triangle Bag 1L on white background showing Trek logo, zipper, patterned Ultragrid material and black panels.
Close‑up of the Trek Adventure Triangle Bag open to show zipper, beige inner lining and GU snacks peeking out.
Flat lay of cycling essentials arranged beside the Trek Adventure Triangle Bag 1L to show its storage capacity.
Two Trek Adventure Triangle Bags mounted behind the head tube on a road bike during a ride.
Trek Adventure Triangle Bag 1L displayed with its mounting hardware and straps.
Rear view of the Trek Adventure Triangle Bag 1.3L showing the back pouch with accessories partially tucked inside.
Outdoor close‑up of a cyclist riding a Trek Project One bike with two black Trek frame bags mounted above the bar and another mounted below the bar.
Trek Adventure Triangle Bag 1.3L on a white‑grey background showing zipper, patterned material, black panels and visible pouch with straps.
Flat lay of cycling gear arranged beside the Trek Adventure Triangle Bag 1.3L to illustrate its storage capacity.
Trek Adventure Triangle Bag 1.3L displayed with its mounting accessories and hardware.
Rear view of the Trek Adventure Triangle Bag 1.3L showing the back pouch with cycling gloves and accessories partially tucked inside.
Trek Adventure Triangle Bag 1.6L front view showing zipper, pouch, mixed materials and stitched rectangular Trek logo patch.
Flat lay of the Trek Adventure Triangle Bag 1.6L with a variety of cycling gear that fits inside the pouch.
Trek Adventure Triangle Bag 1.6L displayed with straps and mounting hardware.
Rear view of the Trek Adventure Triangle Bag 1.6L showing the back pouch with cycling gloves and accessories inside.

Trek

Trek Adventure Triangle Bag

$114.99 - $114.99
$114.99
$114.99
$114.99 - $114.99
$114.99
Color: Black
Cargo Capacity: 1L

The Trek Adventure Triangle Bag is a sleek, low‑profile frame bag that fits neatly behind your head tube, giving you extra storage without sacrificing bottle space. It’s a smart, durable solution for endurance riders and anyone working with a smaller frame.

  • Low‑profile design that tucks cleanly behind the head tube

  • Easy two‑sided access with internal and external pockets

  • Includes thumbscrews for Checkmate SLR & Checkpoint SL Gen 3, plus universal straps

  • Made with lightweight Ultragrid™ Ripstop material from recycled pre‑consumer nylon

  • Interior lining made from recycled plastic bottles

  • Water‑resistant construction to protect your essentials

  • Available cargo capacities: 1L, 1.3L, 1.6L

  • Multiple size options to match a wide range of bike geometries

Ideal for: Riders who want compact, reliable storage for long days, gravel adventures or smaller frames where space is at a premium.

Shipping information

Ships in 2–3 business days with free delivery across Canada on orders over $99. Same‑day pickup available Tue–Sat (closed Sun–Mon).

Returns & warranty

Enjoy hassle‑free returns within 30 days on unused items in original packaging (excludes bikes and sale items). Free in‑store returns anytime.