Marin Four Corners 1 vs Surly Bridge Club
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 bottle positions 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
4 of the 7 things we can compare come out differently. The rest are close enough not to decide anything.
Rear rack
only the Four Corners 1 publishes a rear rack answerRead from each maker's own mount wording. An adapter is a real cost the price tag does not mention, and 'not published' is not the same as no — it just is not something to buy a rack on.
Frame bottle positions
3 more on the Four Corners 1The maximum the maker publishes across sizes. Worth knowing before you buy a frame bag, because a full-frame bag covers most of them.
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.
Chainstay
8mm longer on the Four Corners 1The gap between seat tube and rear axle, which a rack, panniers and your heels all share. Longer is more room for a load; shorter is a more compact bike. Which you want is a preference, not a winner.
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 Bridge Club | |
|---|---|---|
| Frame bag space | 1625 cm² | 1684 cm² |
| Widest published tire | 45mm on 700c / 29in | 47mm on 700c / 29in, 71mm on 650b / 27.5in, 76mm on 26in |
| Rear rack | Bolts straight on | Not published |
| Fork cargo mounts | Published | Published |
| Frame bottle positions | 6 | 3 |
| Dropper post | Compatible | Not compatible |
| Chainstay | 443mm | 435mm |
| Sizes | 5 | 5 |
| Frame | — | 4130 Chromoly, Natch tubing, double-butted main triangle |
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.
