The Marin Gestalt Base Black 58 is a purpose-built adventure and gravel bike designed for taller riders (approx. 6’1” to 6’4”) who seek versatility, comfort, and durability on mixed terrain. Its large 58 cm frame size maintains Marin’s signature endurance geometry, offering stability and control during long rides, gravel exploration, and urban commuting.
🛠️ Frame & Geometry
Material: Series 2 6061 Aluminum Alloy — lightweight yet sturdy, optimized for endurance riding.
Geometry: Relaxed head tube angle (~70°) and longer wheelbase enhance stability and comfort over rough terrain and long distances.
Features: Internal cable routing reduces maintenance and enhances aesthetics. Equipped with full rack and fender mounts for touring and utility use. Compatible with flat-mount disc brakes.
Tire Clearance: Supports 700x35c tires with fenders, and potentially wider tires without fenders for increased traction.
🧩 Fork
Material: CrMo Steel fork — absorbs road vibrations, increasing comfort.
Mounts: Includes eyelets for fenders and racks, enhancing versatility.
Brakes: Flat-mount disc brake compatible with 160mm rotors.
⚙️ Drivetrain
Groupset: Shimano Claris 2x8-speed (16 speeds), reliable entry-level components balancing performance and value.
Crankset: FSA Tempo Compact 50/34T provides a broad gear range for climbing and cruising.
Cassette: SunRace 11-32T 8-speed, wide gear spread for varied terrain.
Shifters & Derailleurs: Shimano Claris STI levers and derailleurs offer smooth shifting.
Bottom Bracket: Sealed cartridge design for durability and smooth rotation.
🛞 Wheels & Tires
Rims: Marin double-wall aluminum, tubeless-ready, 19mm internal width, disc-specific for improved braking and handling.
Hubs: Alloy, 6-bolt disc mounts, 32 spokes ensure strength and reliability.
Tires: Vee Tire Co. Zilent 700x35c, puncture-resistant with reflective sidewalls for safety and durability.
Tubeless Compatibility: Yes, requires separate tape and valves.
🛑 Brakes
Type: Tektro MD-C400 mechanical disc brakes.
Rotors: 160mm front and rear, 6-bolt mount.
Performance: Dependable stopping power in all weather conditions, with lower maintenance complexity than hydraulics.
Rider Comfort & Control
Handlebars: 12° flared drop bars improve control on gravel and rough surfaces; multiple hand positions reduce fatigue.
Stem: Marin 3D forged alloy, 31.8mm clamp diameter.
Seatpost: 27.2mm alloy micro-adjustable for precise saddle placement.
Saddle: Marin Beyond Road Concept designed for all-day comfort.
Practicality & Customization
Mounts: Full rack and fender mounts plus dual bottle cage mounts enhance carrying capacity and utility.
Tire Clearance: Accommodates wider tires (~35-40mm) improving comfort and grip off-road.
Upgrade Path: Supports tubeless tire conversion and drivetrain enhancements.
