Marin Four Corners 1

The Marin Four Corners 1 is a dependable touring, gravel and adventure bike designed for riders who want comfort, durability and carrying capability for daily commuting, long-distance touring and bikepacking adventures.

Its Series 1 custom-butted 4130 CrMo steel frame is paired with a matching steel fork to provide a stable and comfortable ride across paved roads, broken surfaces and gravel routes.

The Shimano CUES 2x9-speed drivetrain delivers a practical gear range for climbing, cruising and riding with luggage, while Tektro Spyre-C mechanical disc brakes provide controlled and reliable braking. Wide 45 mm tires improve comfort and traction across mixed terrain.

Multiple mounting points for bottles, racks, mudguards and accessories make the Four Corners 1 highly adaptable for touring and everyday use. With flared drop handlebars and adventure-focused geometry, it is built for riders who want one reliable bike for exploring more.

Key Features

• Bike Type: Touring, gravel and adventure bicycle

• Frame: Series 1 custom-butted 4130 CrMo steel frame

• Fork: Series 1 CrMo steel fork with accessory mounting points

• Drivetrain: Shimano CUES 2x9-speed

• Rear Derailleur: Shimano CUES RD-U3020 9-speed

• Front Derailleur: Shimano CUES FD-U6030

• Crankset: Shimano CUES FC-U6030-2, 46/32T

• Cassette: Shimano CUES CS-LG300, 11-36T

• Brakes: Tektro Spyre-C mechanical disc brakes

• Rotor Size: 160 mm front and rear

• Tires: Vee Tire Co. QuickStyk 45 mm

• Wheel Setup: Size-specific 650B or 700C wheels

• Handlebar: Marin compact alloy drop bar with 16° flare

• Mounting Options: Rack, mudguard, bottle, fork and accessory mounts

• Riding Style: Touring, gravel, commuting, bikepacking and adventure riding

Product Specifications

• Brand: Marin Bikes

• Model: Four Corners 1

• Product Type: Touring / Gravel / Adventure Bicycle

• Frame Material: 4130 Chromoly Steel

• Frame: Series 1 CrMo with Biometric Geometry

• Fork Material: Chromoly Steel

• Fork: Series 1 CrMo with rack, mudguard and bottle cage eyelets

• Wheel Size XS-S: 650B

• Wheel Size M-XL: 700C

• Available Sizes: XS, S, M, L and XL

• Rear Derailleur: Shimano CUES RD-U3020, 9-Speed

• Front Derailleur: Shimano CUES FD-U6030

• Shift Levers: Shimano CUES ST-U3030 Dual Control, 2x9

• Crankset: Shimano CUES FC-U6030-2

• Chainrings: 46/32T

• Cassette: Shimano CUES CS-LG300, 11-36T

• Chain: Shimano LinkGlide LG500

• Bottom Bracket: Shimano Outboard Bearing

• Front Brake: Tektro Spyre-C Road Mechanical Disc

• Rear Brake: Tektro Spyre-C Road Mechanical Disc

• Front Rotor: 160 mm

• Rear Rotor: 160 mm

• Rims: Marin Aluminum Double Wall, Disc Specific

• Front Hub: Forged Aluminum Alloy Disc Hub, 32H

• Rear Hub: Forged Aluminum Alloy Disc Hub, 32H

• Spokes: 14g Black Stainless Steel

• Tires: Vee Tire Co. QuickStyk, 650B/700C x 45

• Handlebar: Marin Butted Alloy Compact 16° Flared Drop

• Stem: Marin 3D Forged Alloy

• Bar Tape: Marin Comfort Bar Tape with Shock Absorbing Gel Pads

• Headset: FSA No.8D Sealed Cartridge Bearings

• Seatpost: Marin Alloy, 27.2 mm

• Saddle: Marin MTB

• Pedals: Nylon Platform

• Frame Mounts: Bottle, top-tube accessory, rack and mudguard mounting points

• Fork Mounts: Bottle cage, rack and accessory mounting points

Touring & Bikepacking Capability

• Loaded Touring Design: The CrMo steel construction provides a strong and dependable platform for carrying luggage and touring equipment.

• Cargo Capability: Multiple mounting points allow compatible racks, panniers, bottle cages, fork cages and bikepacking bags to be fitted.

• Long-Ride Comfort: Adventure-focused geometry provides a comfortable riding position for longer journeys and extended days in the saddle.

• Size-Specific Wheels: Smaller frame sizes use 650B wheels, while larger sizes use 700C wheels to maintain balanced fit and handling.

• Wide Tire Platform: 45 mm tires provide extra cushioning, stability and traction on gravel roads, broken pavement and mixed terrain.

• Weather Ready: Mudguard mounting points make the bike practical for commuting and touring in changing weather conditions.

• Adventure Versatility: The Four Corners 1 is designed for paved roads, gravel tracks, touring routes and light off-road exploration.

Easy Operation / Usage

• Gear Selection: Shimano CUES integrated controls allow braking and gear changes directly from the drop-bar levers.

• Climbing Setup: Use the lower gears when climbing steep roads or riding with additional luggage.

• Cruising Setup: Higher gears are suitable for flatter roads, descents and faster touring sections.

• Braking: Apply the Tektro mechanical disc brakes progressively for smooth and controlled stopping.

• Cargo Setup: Use compatible racks, cages and bags with the dedicated frame and fork mounting points.

• Tire Pressure: Adjust tire pressure according to rider weight, luggage load, terrain and tire manufacturer recommendations.

• Pre-Ride Check: Inspect the brakes, tires, wheels, drivetrain and luggage mounting points before every long ride.

Why Choose This Product

• Touring Capability: Suitable for everyday commuting, weekend adventures and multi-day bikepacking trips.

• Steel Construction: 4130 CrMo steel provides a strong and durable platform for long-distance and loaded riding.

• Practical Gearing: Shimano CUES 2x9 gearing provides a useful range for climbing, cruising and touring with luggage.

• Reliable Braking: Mechanical disc brakes provide dependable braking with straightforward maintenance.

• Cargo Friendly: Multiple mounting points allow the bike to be configured with touring and bikepacking equipment.

• Comfort Focused: Wide tires, flared handlebars and adventure geometry support comfort during longer rides.

• Mixed-Surface Capability: Suitable for paved roads, gravel roads, broken surfaces and light trails.

• Size-Specific Design: 650B and 700C wheel options help provide balanced handling across different frame sizes.

In the Box

• 1 × Marin Four Corners 1 Bicycle

• 1 × Pair of Nylon Platform Pedals

• 1 × Standard Manufacturer Documentation

• Standard Fitting and Assembly Hardware