The Marin Four Corners is a bike that lives at the intersection of practicality and possibility. Engineered for both weekday commutes and cross-country escapes, it’s a dependable, steel-framed touring machine that embraces the rigors of fully loaded travel while delivering the comfort and control essential for long days in the saddle.

At its core is a rugged and forgiving Series 1 butted 4130 CrMo steel frame and fork, built to handle the added weight of gear without compromising ride quality. With mounts for up to six water bottles, plus eyelets for racks, fenders, and lowrider panniers, the Four Corners is a true cargo-capable platform. Its massive tire clearance allows for 650B or 700C wheels (depending on frame size) and up to 40mm tires — ready to soak up broken pavement, gravel roads, or fully loaded mountain passes.

Where many touring bikes compromise fit in favor of simplicity, the Four Corners leans into rider comfort and control. Marin's biometric geometry ensures a proportionate fit for riders from 4'11" to 6'4", with frame sizes paired to appropriately sized wheels: 650B for XS and S, and 700C for M through XL. A tall front end and compact drop bar with 16° flare put the rider in a heads-up, relaxed posture for confident navigation in traffic and optimal endurance over long hauls.

The drivetrain is powered by a Shimano Sora 3x9-speed system, offering a wide gearing range for tackling steep climbs with a fully loaded rig while still maintaining efficiency on flat roads. Tektro Spyre-C mechanical disc brakes deliver dependable stopping power in all conditions — from city streets to alpine descents — with easy serviceability for the self-sufficient traveler.

Performance and Adventure-Ready Features:

• Series 1 CrMo Steel Frame and Fork
  Butted chromoly tubing with integrated rack, fender, bottle, and lowrider mounts. Built to carry gear and handle abuse with stability and comfort.

• Biometric Fit Geometry & Size-Specific Wheels
  Five frame sizes matched to 650B or 700C wheels, designed around real-world rider proportions for a dialed-in fit and confident handling.

• Shimano Sora 3x9 Drivetrain
  A triple crankset and wide-range cassette ensure maximum flexibility for loaded touring, urban inclines, and everything in between.

• Tektro Spyre-C Mechanical Disc Brakes
  Twin-piston calipers offer strong, balanced braking power and are easily maintained in remote locations.

• Adventure-Optimized Cockpit
  Marin compact alloy bar with 16° flare for improved leverage and comfort off-road; gel-padded bar tape smooths out the miles.

• Ready for All Terrain
  Wide 40mm tires, sturdy disc-specific double-wall rims, and a steel chassis tuned for stability under load — all primed for roads less traveled.

Go Further, Every Day

From weekday errands with a laptop and lunch to weekend epics with a tent and stove, the Marin Four Corners adapts seamlessly to the rhythm of your life. It’s a bike that invites you to travel far, explore freely, and never hesitate when the pavement ends. Whether it’s your first tour or your fiftieth, this is a machine built to go the distance — and then some.