2026 Marin Four Corners 1
MarinMidweek commute or weekend adventures? A three day audax or a 12 month round the world tour? The Four Corners 1 now comes with a fresh 2x9 MicroShift Sword drivetrain offering improved reliability and a wider range of useable gears.
The butted 4130 CroMo steel frame and fork are designed to be comfortable on rough roads but to also handle fully loaded touring and bike packing. We've included six bottle mounts, rack and fender eyelets, lowrider fork mounts, generous tire clearance and disc brakes to set you up for all conditions and all terrain.
Whatever you choose is no problem for the Marin Four Corners, our steel-framed explorer that's as comfortable on the asphalt as it is in the dirt.
Technologies

2 x 9 MicroSHIFT Transmission
Series 1 Butted 4130 CrMo Steel Frame
Bottle, Rack and Fender Mounts
- Frame:
- Series 1 CrMo, Size-Specific Wheels (XS, S = 650B, M, L, XL = 700C) , Biometric Geometry, Fender and Rack Mounts, Disc Mount
- Rim:
- Marin Aluminum, Double Wall, Disc Specific
- Hub Rear:
- Forged Aluminum Alloy, Disc, 32H
- Hub Front:
- Forged Aluminum Alloy, Disc, 32H
- Spokes:
- 14g Black Stainless Steel
- Tires:
- Vee Tire Co., GPVee, 700/650x40
- Derailleur Rear:
- MicroSHIFT Sword Black, 9-Speed
- Shift Lever:
- MicroSHIFT Sword Black, 2x9-Speed
- Crankset:
- Forged Aluminum, 46-29T
- Bottom Bracket:
- Square Taper, Sealed Bearing
- Chain:
- KMC X9
- Cassette:
- MicroSHIFT, 9-Speed, 11-38T
- Brakes Front:
- Tektro Spyre-C Road Mechanical Disc, 160mm Rotor
- Brakes Rear:
- Tektro Spyre-C Road Mechanical Disc, 160mm Rotor
- Brake Levers:
- MicroSHIFT Sword w/ Integrated Shifters
- Handlebar:
- Marin Butted Alloy, Compact 16º Flared Drop
- Stem:
- Marin 3D Forged Alloy
- Grips:
- Marin Comfort Bar Tape, Shock Absorbing Gel Pads
- Headset:
- FSA No.8D, Sealed Cartridge Bearings
- Seatpost:
- Marin Alloy, 27.2mm
- Saddle:
- Marin MTB
- Fork:
- Series 1 CrMo, Fender, Rack, and Bottle Cage Eyelets, IS Disc Mount
- Pedals:
- Trekking Platform