Marin Four Corners 1 2024 Turquoise Adventure Bike

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 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 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.

40mm wide multi-surface Vee GP tires are up for wherever your adventures take you, while Shimano’s supremely reliable Sora 3×9 drivetrain ensures that you’ll always have the right gear ratio. Finally, Tektro Spyre-C mechanical disc brakes deliver controlled braking, even when riding fully loaded.

Specification

Frame	Series 1 CrMo, Size-Specific Wheels (XS, S = 650B, M, L, XL = 700C) , Biometric Geometry, Fender and Rack Mounts, Disc Mount
Fork	Series 1 CrMo, Fender, Rack, and Bottle Cage Eyelets, IS Disc Mount
Rims	Marin Aluminum, Double Wall, Disc Specific
Rear Hub	Forged Aluminum Alloy, Disc, 32H
Front Hub	Forged Aluminum Alloy, Disc, 32H
Spokes	14g Black Stainless Steel
Tyres	Vee Tire Co., GPVee, 700/650×40
Rear Derailleur	Shimano Sora 9-Speed
Front Derailleur	Shimano Sora
Shifters	Shimano Sora ST300 3×9-Speed
Crankset	Shimano Sora FC3030, 50-39-30T
Bottom Bracket	Shimano
Chain	KMC X9
Cassette	Shimano HG200 9-Speed, 11-34T
Front Brake	Tektro Spyre-C Road Mechanical Disc, 160mm Rotor
Rear Brake	Tektro Spyre-C Road Mechanical Disc, 160mm Rotor
Brake Levers	Shimano 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
Pedals	Trekking Platform

Specifications are subject to change without notice

Size Guide

Frame Size	Minimum Height	Maximum Height
X Small (650b)	150cm (4’11”)	160cm (5’3”)
Small (650b)	157cm (5’2”)	168cm (5’6”)
Medium (700c)	168cm (5’6”)	178cm (5’10”)
Large (700c)	178cm (5’10”)	185cm (6’1”)
X Large (700c)	185cm (6’1”)	195cm (6’5”)

We have developed our size guide from our selling experience and it may differ from the manufacturers guide. Please note, this is only a guide and if you have any concerns over sizing please get in contact

Geometry

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Frame Size	XS	S	M	L	XL
A – Stack	560	580	618	648	679
B – Reach	376.7	381	403.3	412.6	426.6
C – Headtube Angle	70°	70°	71°	71°	71°
D – Headtube Length	167	188	188	209	252
E – Seattube Angle	74.5°	73.5°	73.5°	72.5°	72°
F – Seattube Length	381	422	462	495	528
G – Toptube Effective	532	553	586	617	647
H – BB Height	291	291	288.5	288.5	288.5
I – BB Drop	53.5	53.5	72	72	72
J – Chainstay	432	432	450	450	450
K – Wheelbase	1035	1047	1087	1107	1132
L – Standover Height	668	707	745	777	810
M – 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

Want to compare the size of your current bike to this one? Read our Reach and Stack guide here.