Frameset
Frame
Series 1 Comfort, E-Bike Specific, 6061 Aluminum, 27.5” Wheels, Disc Specific, Low-Step Design, Comfort Control Geometry, Kickstand Mount, Fender and Rack Mounts
Fork
CrMo Steel, Straight Blade, Disc Specific, Fender and Rack Eyelets
Stinson E ST
The 2025 Marin Stinson E marks a meaningful update to Marin’s comfort-focused urban e-bike rather than a wholesale redesign. The key change is structural: the battery moves from the rear carrier into the downtube of the new Series 1 6061 aluminum frame, giving the bike a cleaner layout and better weight distribution while preserving the same broad Comfort Control geometry concept. It remains a rigid-fork, rear-hub-motor commuter and leisure bike built around 27.5 x 2.35 in tires, with rack and fender mounts and disc brakes, so its purpose is still practical everyday riding rather than sporty urban performance.
What distinguishes this generation is that integration and system update. Marin pairs the new frame execution with a Bafang rear-hub setup, a 340Wh in-tube battery, Bafang Go app support, an 8-speed drivetrain, and Tektro mechanical disc brakes. The geometry figures cited for 2025 stay essentially in line with the previous platform direction, so this bike’s identity is still centered on stability, easy access, and upright comfort. In the market, the Stinson E sits as a straightforward comfort/urban e-bike for riders who prioritize relaxed fit, utility mounts, and simple component choices over high-power motors, suspension, or premium commuter tech.
Price TBD
Build
Size
| Stack | 629.6mm |
| Reach | 355mm |
| Top tube | 629.6mm |
| Headtube length | 230mm |
| Standover height | 520.4mm |
| Seat tube length | 406mm |
Fit and geometry
The Stinson E’s geometry is clearly biased toward comfort and stability. Across sizes S to L, the head tube angle stays at 68.5 degrees, the seat tube angle at 67 degrees, and the chainstay length at 485 mm, with a 68 mm bottom bracket drop. Those numbers point to calm, predictable handling rather than quick steering: the front end is relatively relaxed, while the long rear center helps keep the bike planted and composed at lower urban speeds and on mixed paved surfaces. The long wheelbases of 1084 mm in S, 1106 mm in M, and 1129 mm in L reinforce that steady, easygoing character.
Fit is equally conservative. Reach figures of 340 mm, 355 mm, and 370 mm are short by performance-bike standards, while stack heights of 628.2 mm to 652.5 mm are notably tall, producing a more upright riding position with less weight on the hands. That suits the bike’s comfort and utility brief, especially when paired with high-volume 27.5 x 2.35 in tires. Riders looking for responsive, aggressive urban handling will likely find it sedate, but for casual city riding, bike paths, and everyday errands, the numbers are aligned with confidence and ease of use.
Full specs
Groupset
Shift levers
Shimano Altus 8-Speed RapidFire
Rear derailleur
Shimano Acera, 8-Speed
Cassette
SunRace 8-Speed, 11-34T
Chain
KMC Z8
Crankset
Alloy Crank, Steel 38T Chainring, Ring Guard
Bottom bracket
Integrated Torque Sensing, Sealed Cartridge Bearings, Square Taper
Front brake
Tektro MDM280 Mechanical Disc
Rear brake
Tektro MDM280 Mechanical Disc
Front rotor
160mm
Rear rotor
160mm
Wheelset
Front wheel
Marin Aluminum Double Wall, Disc Specific; Forged Aluminum Alloy, 32H; 14g Stainless Steel
Rear wheel
Marin Aluminum Double Wall, Disc Specific; Bafang 250 Watt Hub Motor, 40Nm, 36H; 14g Stainless Steel
Front tire
Vee Tire Co. Speedster, 27.5”x2.35”, Puncture Protection
Rear tire
Vee Tire Co. Speedster, 27.5”x2.35”, Puncture Protection
Cockpit
Stem
Marin Alloy
Handlebars
Marin Alloy, 25mm Rise, 18˚ Backsweep
Saddle
Marin Comfort
Seatpost
Marin Alloy, 30.9mm
Grips
Marin County
Builds
The 2025 Stinson E range is offered in two frame formats rather than clearly differentiated component tiers: a standard frame and an ST version. Based on the provided model information, both are built around the same updated platform with the new Series 1 6061 aluminum frame, integrated 340Wh downtube battery, Bafang rear-hub drive system with app support, rigid fork, 27.5 x 2.35 in tires, rack and fender mounts, 8-speed drivetrain, and Tektro mechanical disc brakes.
With no pricing or detailed build split provided, the main distinction appears to be frame style and rider access rather than spec level. That makes the choice more about fit, mounting ease, and preference for the standard or step-through layout than about component hierarchy. In both cases, the specification reads as practical and cost-conscious, favoring straightforward serviceability and urban utility over premium parts.
ST
Price TBD
Selected
Standard
Price TBD