Marin Bikes

Four Corners 2

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Four Corners 2 profile.

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  • Price: *
  • Wheel Size: 700C, 650B
  • Frame: CroMo/Steel
  • Size Range: XS, S, M, L, XL
  • 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 in the dirt.

A double-butted 4130 CrMo steel frame and fork are designed to be comfortable on rough roads and 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 terrain.

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 suit riders between 4'11 perfectly" – 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.

New for '24, the Four Corners 2 takes all the elements that make the Four Corners fantastic and adds a Series 3 double-butted CrMo frameset, a simpler, wide-range SRAM 1x12 speed Apex drivetrain, and matching, powerful Apex 1 hydraulic disc brakes. The rubber meets the road/path/trail with wider, 44mm Vee Tire Qucikstyx tubeless-compatible tires, and the frame can accept tires up to 50mm wide.

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Specifications

  • Frame

    Series 3 Double Butted CrMo, Size-Specific Wheels (XS, S = 650B, M, L, XL = 700C) , Biometric Geometry, Fender and Rack Mounts, 142x12mm Thru-Axle, Flat Mount 160 Disc Mount, Plentiful Gear Mounts (custom bag templates here)

  • Fork

    Series 3 CrMo, 100x12mm Thru-Axle, Flat Mount 160 Disc Mount, Fender, Rack, and Bottle Cage Eyelets

  • Rims

    Marin Aluminum Double Wall, 25mm Inner, Disc Specific, Tubeless-Compatible

  • Hub Rear

    Forged Aluminum Alloy, Disc, 32H

  • Hub Front

    Forged Aluminum Alloy, Disc, 32H

  • Spokes

    14g Black Stainless Steel

  • Tires

    Vee Tire Co., Quickstyx, 650/700x45, Tubeless-Compatible

  • Derailleur Rear

    SRAM Apex 1 12-Speed

  • Derailleur Front

    -

  • Shift Lever

    SRAM Apex 1 1x12-Speed

  • Crankset

    SRAM Apex 1, 40T

  • Bottom Bracket

    SRAM DUB BSA

  • Chain

    SRAM NX

  • Cassette

    SRAM CS-XG-1275, 10-52T

  • Brakes Front

    SRAM Apex 1 Flat-Mount Hydraulic Disc, 160mm Rotor

  • Brakes Rear

    SRAM Apex 1 Flat-Mount Hydraulic Disc, 160mm Rotor

  • Brake Levers

    SRAM Apex 1 Hydraulic Disc

  • Handlebar

    Marin Butted Alloy, Compact 16º Flared Drop

  • Stem

    Marin 3D Forged Alloy

  • Grips

    Marin Comfort Tape

  • Headset

    FSA No.42/ACB

  • Seatpost

    Marin Alloy, 27.2mm

  • Saddle

    Marin Beyond Road Concept

  • Pedals

    Marin Oso OEM Nylon Platform

  • Extras

    Bolt-On Thru-Axles F & R

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

Geometry

Four Corners 2 geometry diagram
XS S M L XL
Stack 560 580 618 648 679
Reach 376.7 381 403.3 412.6 426.6
Headtube Angle 70° 70° 70° 71° 71°
Headtube Length 167 188 188 209 252
Seattube Angle 74.5° 73.5° 73.5° 72.5° 72°
Seattube Length 381 422 462 495 528
Toptube Effective 532 553 586 617 647
BB Height 291 291 288.5 288.5 288.5
BB Drop 53.5 53.5 72 72 72
Chainstay 432 432 450 450 450
Wheelbase 1035 1047 1087 1107 1132
Standover Height 668 707 745 777 810
Fork Offset 43 43 49 49 49
Seatpost Diameter 27.2 27.2 27.2 27.2 27.2
Handlebar Width 440 440 460 460 460
Stem Length 70 70 70 70 70
Crank Length 170 170 170 175 175

All lengths in millimeters

Technology

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

FIVE FRAME SIZES

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.

BOTTLE / 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.

TALL HEADTUBES

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

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

Marin Four Corners Series 1 CrMo decal image.

STEEL IS REAL

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.

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4C1 frame detail, showing generous tire clearance.

GENEROUS TIRE CLEARANCE

The Four Corners 1 can accommodate tires up to 45mm wide.

Four Corners 1 seat tube dropper post port detail.

Dropper Post Compatible

The Four Corners offers a port on the lower part of the seat tube, allowing the installation of an aftermarket dropper post. Droppers are great at adding clearance when riding technical trails, or for simply putting a foot down while stopped at a light.

Reviews

Marin has elevated the Four Corner’s reputation as a reliable, comfortable, easy-to-kit-out, do-it-all bikepacking and touring-oriented gravel bike.