Trek
1120 Frameset2026
Frame
Alpha Platinum Aluminum
Wheel size
29+
From
$1,299.99
Sizes
4
What it can carry
Mount provision and clearance, as Trek publishes it.
Fork mounts
proprietary rack mounts
Rack & fender
proprietary rack mounts
Dropper post
Compatible
Builds
As Trek lists them. Prices are MSRP at our last check and move around — treat them as a reference point, not a live quote.
| Build | Drivetrain | MSRP |
|---|---|---|
| 1120 Frameset | — | $1,299.99 |
Geometry
All figures in millimetres except angles. Effective top tube and seat tube are the two that decide frame bag fit.
| Size | Eff. top tube | Seat tube | Standover | Head tube | Stack | Reach | Chainstay | Wheelbase | BB drop | Head angle | Seat angle |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S/15.5 | 560 | 394 | 778 | 100 | 634 | 396 | 440 | 1082 | 76 | 70.4° | 73.5° |
| M/17.5 | 586 | 419 | 791 | 100 | 634 | 422 | 440 | 1108 | 75 | 70.4° | 73.5° |
| L/19.5 | 619 | 470 | 792 | 110 | 642 | 451 | 440 | 1142 | 75 | 70.3° | 73.5° |
| XL/21.5 | 643 | 521 | 792 | 120 | 651 | 471 | 440 | 1166 | 75 | 70.3° | 73.5° |
Source: https://www.swsports.net/product/trek-1120-frameset-397026-1.htm — checked 2026-08-16. A dash means Trekdoesn't publish that figure; we leave it blank rather than estimate.
Note: Trek current touring category lists 1120 Frameset; complete bike not verified current.
Find bags that fit
The bag finder can load this bike's published geometry directly — pick Trek 1120 Frameset and your size, and it will check every bag in the database against your frame triangle.
Open the Bag Finder