Specialized Diverge STRGeometry & Bikepacking Bag Fit2024
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.
429mm chainstays, 6mm shorter than the 435mm median across the 66 current frames here. Bottom bracket drop 80-85mm, 13mm more than the 70mm median. The fork publishes cargo mounts, and the frame publishes bottle or accessory mounts. A rear rack bolts straight on. Widest published tire 53mm on 650b / 27.5in, 47mm on 700c / 29in. It takes a dropper post.
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 Specialized publishes it.
Specialized's wording: “47mm on a 700c wheel and 2.1” on 650B.”
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 49 | 527 | 390 | 704 | 100 | 569 | 365 | 429 | 1023 | 80 | 70° | 74.5° |
| 52 | 540 | 430 | 730 | 100 | 576 | 374 | 429 | 1027 | 85 | 70.5° | 74.25° |
| 54 | 556 | 470 | 753 | 115 | 593 | 383 | 429 | 1034 | 85 | 71.25° | 74° |
| 56 | 570 | 500 | 778 | 130 | 609 | 392 | 429 | 1044 | 85 | 71.75° | 74° |
| 58 | 586 | 530 | 804 | 155 | 633 | 401 | 429 | 1060 | 85 | 71.75° | 74° |
| 61 | 602 | 560 | 833 | 182 | 659 | 410 | 429 | 1078 | 85 | 71.75° | 74° |
Bottom bracket height
Roughly 290–295mm off the ground. Specializeddoesn'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 — Specialized's own geometry chart: https://www.specialized.com/us/en/diverge-str-comp-shimano-grx/p/200579 — checked 2026-08-18. A dash means the figure isn't published; we leave it blank rather than estimate.
Note: Geometry from Specialized’s published Diverge STR chart; the product page labels it 2024 and no later chart exists. Mount wording is from the 2023 Diverge STR user manual linked from that page. Specialized on droppers: “Dropper post compatible, with no drawbacks.” Bottle cage positions vary with frame size.
Which frame bags fit
Every frame bag we track, checked against this frame's published geometry. Pick your size.
Checking 19 frame bags against a 570mm effective top tube and 500mm seat tube. 19 fit.
Frame bag fit is calculated from Specialized'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.