Marin Four Corners 1 vs Surly Disc Trucker 26
Both published charts held against each other, on the specs that decide what the bike carries.
The short answer
The Four Corners 1 is ahead on frame bag space and dropper compatibility. Nothing here goes the other way.
Assembled from the differences below rather than written over them, so it cannot drift from the table. Every figure is the manufacturer's; nobody here has ridden either bike.
Where they differ
3 of the 7 things we can compare come out differently. The rest are close enough not to decide anything.
Frame bag space
86 cm² more on the Four Corners 1Front-triangle area at the largest size, computed from stack, reach and seat angle. It is what decides how much full-frame bag you can run, and a frame bag is the one place weight sits low and central.
Widest published tire
quoted on different wheel sizes — no like-for-like figureThe frame figure, not the fork's — forks are routinely cut for more rubber than the rear triangle, and compared only on a wheel size both frames publish. Loaded, tire width is also seat-pack clearance: a big tire and a sagging pack compete for the same space.
Dropper post
only the Four Corners 1 publishes dropper routingA dropper cannot be strapped to, so fitting one rules out almost every seat pack and leaves rail-mounted bags at a fraction of the volume. It is a capability and a constraint at once.
Side by side
Including the rows where the two are level, because a spec that doesn't separate them is still a spec you might be checking.
| Marin Four Corners 1 | Surly Disc Trucker 26 | |
|---|---|---|
| Frame bag space | 1625 cm² | 1539 cm² |
| Widest published tire | 45mm on 700c / 29in | 53mm on 26in |
| Rear rack | Bolts straight on | Bolts straight on |
| Fork cargo mounts | Published | Published |
| Frame bottle positions | 6 | not published as a count |
| Dropper post | Compatible | Not compatible |
| Chainstay | 443mm | 450mm |
| Sizes | 5 | 6 |
| Frame | — | 4130 Chromoly steel |
Drawn to scale
Largest published size of each, built from the charts rather than illustrated. The front triangle is the part that decides frame bag fit.
