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Four Corners

2021 Marin Four Corners profile, black. 2021 Marin Four Corners profile, green.

See this bike in a different color:

  • Price: $1,199.00*
  • Wheel Size : 700C, 650B
  • Frame: CroMo/Steel
  • Size Range: XS, S, M, L, XL
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Manufacturer’s suggested retail price may not include additional shipping or preparation charges. Please contact your local Marin dealer for a quote.




Midweek commute, weekend adventures. No problem for the Marin Four Corners, our steel-framed explorer that’s as comfortable on the asphalt as it is in the dirt.

A butted 4130 CrMo steel frame and fork are designed to be comfortable on rough roads but to also handle fully loaded touring and bikepacking. 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 terrains.

Don’t be fooled, that classic frame material doesn’t mean low-tech. We’ve used biometric fit data to offer five different frame sizes, with size-matched 650b or 700C wheels to perfectly suit riders between 4’11” – 6’4”. A high front-end creates all-day comfort and heads-up visibility, off-road-ready geometry means you won’t skip a beat when you head off the asphalt and explore Beyond Road.


  • Frame

    Series 1 Utilitour Double Butted CrMo, Size-Specific Wheels (XS, S = 650B, M, L, XL = 700C), Biometric Geometry, Fender and Rack Mounts, Disc Mount

  • Fork

    CrMo, Fender, Rack, and Bottle Cage Eyelets, IS Disc Mount

  • Rims

    Marin Aluminum, Double Wall, Disc Specific

  • Hub, Rear

    Forged Aluminum Alloy, Disc, 32H

  • Hub, Front

    Forged Aluminum Alloy, Disc, 32H

  • Spoke, Nipples

    14g Black Stainless Steel

  • Tires

    Vee Tire Co., GPVee, 700/650x40

  • Derailleur, Rear

    Shimano Sora 9-Speed

  • Derailleur, Front

    Shimano Sora

  • Shift Lever

    Shimano Sora 3x9-Speed

  • Crankset

    Shimano Sora Hollowtech II, 50/39/30T

  • Bottom Bracket

    Shimano Hollowtech II

  • Chain

    KMC X9

  • Cassette

    Shimano HG200 9-Speed, 11-34T

  • Brake, Front

    Tektro Spyre-C Road Mechanical Disc, 160mm Rotor

  • Brake, Rear

    Tektro Spyre-C Road Mechanical Disc, 160mm Rotor

  • Brake Levers

    Shimano w/ Integrated Shifters

  • Handlebar

    Marin Butted Alloy, Compact 12º 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

  • Pedals

    Trekking Platform

Specifications, pricing, and availability are subject to change without notice.


Four Corners geometry diagram
Stack 560 580 617 646.3 677.6
Reach 376.7 381 403.3 412.6 426.6
Headtube Angle 70.5° 70.5° 71.5° 71.5° 71.5°
Headtube Length 177 198 198 229 262
Seattube Angle 74.5° 73.5° 73.5° 72.5° 72°
Seattube Length 381 422 462 495 528
Toptube Effective 532 552.8 586.1 616.4 646.8
BB Height 285 285 285 285 285
BB Drop 53.5 53.5 72 72 72
Chainstay 432 432 450 450 450
Wheelbase 1030.4 1041.8 1081 1100 1125.1
Standover Height 666.55 706.38 744.53 777.26 809.8
Fork Offset 43 43 49 49 49
Seatpost Diameter 27.2 27.2 27.2 27.2 27.2
Handlebar Width 400 400 420 420 440
Stem Length 70 70 70 70 70
Crank Length 170 170 175 175 175

All lengths in millimeters


Marin Four Corners front 3/4, in a Sonoma County, CA vineyard.


The Four Corners is available in five frame sizes to fit riders 4’11 to 6’4” without compromise. For proper fit and bike handling sizes XS and S use 650B wheels, sizes M, L, and XL use 700C.

Marin Four Corners frame and fork and gear mounts.


Fork leg bottle or accessory cage mounts on the base Four Corners, along with traditional front triangle bottle mounts (three on sizes M-XL, two on XS-S) provide up to six bottle cage mounts total.

Marin Four Corners headtube detail.


The Four Corners is built around a tall headtube, allowing for more frame carrying capacity (larger bags), great rider visibility for taking in the sights, as well as the ability to utilize the multiple positions on the drop bars for all-day comfort.

Marin Four Corners front brake detail.


Disc brakes provide smooth, controlled stopping in all conditions with minimal maintenance. Especially important when riding a fully loaded bike.


The Four Corners uses butted and formed Series 1 4130 CrMo frames specially tuned for loaded touring with upright geometry for comfortable and efficient all-day rides.

Learn More
Jar of pickles strapped to a Marin Four Corners.


The Four Corners is your choice in bicycle if you plan on packing a punchy pickle pick-me-up. But seriously, the fork legs on the Four Corners has gear mounts so that you can add additional bottle or "anything" cages, or front carriers.

*pickles and Blackburn Outpost cargo cage sold separately

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How Versatile is the Four Corners?

Finnish adventurer Andrei Jordi wanted a bike that he could do a little bit of everything on. Massive multi day tours, mid week adventures and everything in between. Andrei chose the Four Corners as his bike to do just that, did he make the right choice?
Watch Here