Gravel

Marin Four Corners (650b sizes)

2026 · 650b wheels · 2 sizesCheck data

Steel touring and bikepacking bike with a CrMo frame and fork and rack, fender, bottle and fork cargo mounts. Marin uses size-specific wheels: the XS and S frames roll on 650b wheels, while M, L and XL use 700c, so the smaller sizes have a shallower bottom bracket drop and shorter chainstays. The Four Corners 1 uses a Series 1 CrMo frame and the Four Corners 2 a Series 3 double butted CrMo frame with thru-axles; Marin publishes the same geometry for both. Handlebar, stem and crank sizes are from the Four Corners 1 build.

Source: marinbikes.com/products/2026-four-corners-1