Marin Pine Mountain 1 Geometry & Bikepacking Bag Fit2024
Discontinued. Marin no longer lists the Pine Mountain 1. It's here because these frames stay in circulation second-hand and the geometry is still what you need to pick bags — but you won't find one new.
Marin Pine Mountain 1 frame geometry, drawn to scale
Every tube angle and length below is from the published chart, not an illustration. The front triangle area is the number that decides which frame bags fit — and it changes a lot across sizes.
What this frame gives a loaded bike
Chainstay length is the gap between the seat tube and the rear axle, which a rack, panniers and your heels all have to share. Bottom bracket drop is how far the cranks sit below the axles. Both are compared against the median across every current frame we hold.
432mm chainstays, about the median for the 65 current frames here. Bottom bracket drop 60mm, 10mm less than the 70mm median. Marin publishes no fork cargo mounts, and no frame bottle positions are published. Marin publishes no rear rack answer, which is not the same as no — but it is not something to buy a rack on.
Every figure above is the manufacturer's, computed against the rest of the database. It says what the frame allows, not how it feels — nobody here has ridden it.
What it can carry
Mount provision and clearance, as Marin publishes it.
Geometry
All figures in millimeters 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 | 578.9 | 370 | 682 | 110 | 641.2 | 425 | 432 | 1172.4 | 60 | 65° | 76.5° |
| M | 605 | 395 | 704.5 | 115 | 645.7 | 450 | 432 | 1199.5 | 60 | 65° | 76.5° |
| L | 632.2 | 430 | 737.4 | 125 | 654.8 | 475 | 432 | 1228.7 | 60 | 65° | 76.5° |
| XL | 668.4 | 475 | 777.8 | 130 | — | 510 | 432 | 1265.8 | 60 | 65° | 76.5° |
Bottom bracket height
Roughly 315mm off the ground. Marin doesn't publish this directly — we derive it from their BB drop and a typical 75cm tire diameter, so treat it as indicative rather than exact. It changes with the tire you fit. Lower means more stable and more pedal strikes; higher means the opposite.
Source — Marin's own geometry chart: https://marinbikes.com/products/2024-pine-mountain-1 — checked 2026-08-18. A dash means the figure isn't published; we leave it blank rather than estimate.
Note: Geometry from Marin’s 2024 Pine Mountain 1 chart. XL stack is left blank: Marin publishes 559.3mm, which is 95mm below the L and contradicts its own XL reach, effective top tube and seat angle by 24mm. The other three sizes reconcile to within 0.04mm. Frame-bag fit for the XL is answered from reach and effective top tube only.
Questions people ask about this frame
Answered from what Marin publish. Where they publish nothing, that is what it says.
Does the Pine Mountain 1 take fork cargo cages?
Not published. Marin don't state any fork mount provision for this frame. That isn't the same as it having none, and we won't guess from a photo.
What is the widest tyre the Pine Mountain 1 takes?
Not published in a form we can read. Marin don't publish a maximum tyre width for this frame.
Will a seat pack work on the Pine Mountain 1?
Not published. Marin don't state dropper compatibility for this frame, so we can't tell you whether a dropper would compete with a seat pack on it.
Which frame bags fit
Every frame bag we track, checked against this frame's published geometry. Pick your size.
Checking 16 frame bags against a 632.2mm effective top tube and 430mm seat tube. 15 fit.
Read these as conservative. This size has a steeply sloping top tube — the seat tube is only 68% of the effective top tube. Bag makers publish a minimum seat tube length assuming a roughly level top tube, so on a frame like this the comparison understates how much room you actually have. The front triangle here is about 1322 cm², which is the number that actually decides what fits. Several bags marked unlikely below will physically fit. Half-frame bags don't depend on seat tube length at all.
Frame bag fit is calculated from Marin's published geometry, so it's as reliable as their chart. Seat packs and handlebar rolls depend on your exposed seatpost and bar width, which no geometry table lists — the bag finder covers those once you add your own measurements.