The 2025-on Marin Nicasio range is a steel all-road and light gravel platform built around practicality rather than speed-first racing priorities. Marin’s updated frame and fork keep the family’s CroMo construction, rigid steel fork, and utility-focused mounting points, but the major change is expanded tire clearance. On the current Nicasio 1 and Nicasio ST, clearance grows to 700x45 mm, with family notes also pointing to 650B x 50 mm capability, which moves the platform more decisively into modern gravel and mixed-surface use than earlier, narrower all-road interpretations.
What distinguishes the Nicasio in this segment is its combination of classic material choice and broad day-to-day usefulness. It is aimed at riders who want one bike for paved riding, rough back roads, commuting, and year-round utility, with rack and fender compatibility baked into the concept. Within the same generation, Marin broadens the platform with the step-thru Nicasio ST for easier mounting and cargo-friendly use, while the Nicasio+ shifts the emphasis toward chunkier 650B x 47 mm tires and a simpler 1x setup. That gives the range a clear place in the market: affordable, steel-framed adventure bikes that prioritize comfort, versatility, and durability over low weight or aggressive race geometry.
Where to get it.
4 retailers · size 54.
Spec sheet.
Every component shipped with this build.
Geometry & fit.
6 sizes published.
The Nicasio’s geometry points to stable, endurance-oriented handling rather than quick, nervous steering. Across the size range, the head tube angle sits at 71.5 degrees on most sizes, relaxing slightly to 70.5 degrees in size 50, while chainstays remain a consistent 430 mm. Combined with wheelbases from 1016.2 mm to 1074.7 mm, that suggests a bike designed to track predictably on mixed surfaces and remain composed with larger tires, fenders, or cargo. The 76 mm bottom bracket drop is also relatively generous, helping keep the rider centered low in the bike for a planted feel.
Fit numbers reinforce the bike’s upright, all-day intent. Reach is modest, ranging from 372 mm in size 50 to 415 mm in size 60, while stack runs from 550.2 mm to 625.2 mm, giving the bike a taller front end than a more aggressive gravel race bike. Effective top tube lengths from 524.6 mm to 600.2 mm and seat tube angles of 74 to 74.5 degrees on smaller sizes, easing to 73.5 degrees on the 60, should produce a neutral seated position suited to long rides and commuting. In practice, the geometry looks well aligned with the Nicasio’s brief: comfortable fit, steady handling, and confidence over speed.
Where the handlebar sits relative to the bottom bracket — the single most important fit pair.
01Fit geometry6 values
02Component geometry3 values
03Handling geometry7 values
Which size should I buy?
Slide your height to see the recommended size. GearWise's fit algorithm works from the published stack, reach, and ETT — the brand's own recommendation may differ.
→Calculated from GearWise's own stack / reach / ETT algorithm — the brand's size chart may recommend a different size, and a proper bike fit beats any calculator.
The lineup.
4 builds, ranging $999 – $1,899.
The 2025 Nicasio family spans a wide price range, starting with the Nicasio 1 at $999 and the Nicasio 1 ST at the same price, then moving to the Nicasio+ at $1099 and the Nicasio 2 at $1899. At the entry end, Marin is clearly emphasizing accessibility: the standard 1 and step-thru 1 ST give riders the same updated platform and utility focus, with the ST mainly addressing ease of mounting and everyday practicality rather than changing the bike’s core purpose.
The Nicasio+ adds only a small price increase over the base model but shifts the ride character with 650B x 47 mm tires and a 1x drivetrain approach, making it the more off-pavement-oriented and simplified option in the lower half of the range. The Nicasio 2 sits far above the others in price, indicating a more premium build, but no component details are provided here to assess exactly where that extra cost goes. Based on the available information, the clearest value story is in the $999 to $1099 models, which all share the updated steel platform and differ mainly in frame format and wheel/tire-drivetrain emphasis.
