Trek 1120 Frameset

1120 frameset is a bikepacker's dream. The rugged all-terrain frame is made for 29+ tires, has loads of mounts for gear, and can run a dropper post. Build it up exactly as you want, and explore the most extreme backcountry destinations in the farthest reaches of the world.

• This boundary-expanding bike is ready to be spec’d for however you love to adventure
• Our 1120 rack and durable harness system (sold separately) make it easy to secure 8L bags on the rear rack and additional gear up front for the best packing balance
• So many mounting features let you set up your ideal expedition ride as you see fit
• It's also an awesome mountain bike — if you're looking to tear up some singletrack, just pull off the racks
• The horizontal sliding dropout lets you dial in your geometry and easily convert to singlespeed if your derailleur busts out in the wild

A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

Frame	Alpha Platinum Aluminum, tapered head tube, internal derailleur & dropper post routing, proprietary rack mounts, horizontal sliding dropouts, Boost148, 12mm thru axle
Headset	FSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom

Geometry Chart

B B Drop	7.6
B B Height	31.4
Chainstay Length	44
Eff Top Tube	56
Frame Reach	39.6
Frame Size Letter	S
Frame Size Number	15.5
Frame Stack	63.4
Head Angle	70.4°
Head Tube Length	10
Offset	5.1
Seat Tube	39.4
Seat Tube Angle	73.5°
Standover	77.8
Trail	8.5
Wheelbase	108.2
Wheel Size	29+

Color

MATTE NAUTICAL NAVY