Salsa Heyday! vs Surly Karate Monkey
Both published charts held against each other, on the specs that decide what the bike carries.
The short answer
The Heyday! takes frame bag space, tire clearance and price; the Karate Monkey takes bottle positions. Which matters more is your route, not a scoreboard.
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
6 of the 7 things we can compare come out differently. The rest are close enough not to decide anything.
Frame bag space
109 cm² more on the Heyday!Front-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
26mm more on the Heyday! on 650b / 27.5inThe 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.
Rear rack
only the Heyday! 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
1 more on the Karate MonkeyThe maximum the maker publishes across sizes. Worth knowing before you buy a frame bag, because a full-frame bag covers most of them.
Chainstay
17mm longer on the Heyday!The 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.
From
$150 between themManufacturer's cheapest complete build. Every spec above belongs to the frame and does not change between builds of the same model, so the cheapest build of the right frame is usually the right answer.
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.
| Salsa Heyday! | Surly Karate Monkey | |
|---|---|---|
| Frame bag space | 1753 cm² | 1644 cm² |
| Widest published tire | 76mm on 700c / 29in, 102mm on 650b / 27.5in, 122mm on 26in | 64mm on 700c / 29in, 76mm on 650b / 27.5in |
| Rear rack | Needs an extra part — Alternator Rack 190/197 and Rack-Lock seat collar | Not published |
| Fork cargo mounts | Published | Published |
| Frame bottle positions | 2 | 3 |
| Chainstay | 440mm | 423mm |
| From | $1,699 | $1,849 |
| Sizes | 5 | 5 |
| Frame | Aluminum | 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.
