Marin Four Corners 2 2025 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.

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 1×12 speed Apex drivetrain, and matching, powerful Apex 1 hydraulic disc brakes. The rubber meets the road/path/trail with wider, 44mm Vee Tire Rocket Man tubeless-compatible tires, and the frame can accept tires up to 50mm wide.

Specification

Frame	Series 3 Double Butted CrMo, Size-Specific Wheels (XS, S = 650B, M, L, XL = 700C) , Biometric Geometry, Fender and Rack Mounts, 142×12mm Thru-Axle, Flat Mount 160 Disc Mount
Fork	Series 3 CrMo, 100×12mm Thru-Axle, Flat Mount 160 Disc Mount, Fender, Rack, and Bottle Cage Eyelets
Rims	Marin Aluminum Double Wall, 25mm Inner, Disc Specific, Tubeless-Compatible
Rear Hub	Forged Aluminum Alloy, Disc, 32H
Front Hub	Forged Aluminum Alloy, Disc, 32H
Spokes	14g Black Stainless Steel
Tyres	Vee Tire Co., Rocket Man, 650/700×44, Tubeless-Compatible
Rear Derailleur	SRAM Apex 1 12-Speed
Crankset	SRAM Apex 1, 40T
Bottom Bracket	SRAM DUB BSA
Chain	SRAM NX
Cassette	SRAM CS-XG-1275, 10-52T
Front Brake	SRAM Apex 1 Flat-Mount Hydraulic Disc, 160mm Rotor
Rear Brake	SRAM Apex 1 Flat-Mount Hydraulic Disc, 160mm Rotor
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 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.