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From San Francisco to the worldwide motorcycle scene,MASH / MASHhas had a huge impact on the world of motorcycles. 's original "AC " series of truck frames. The long-awaited fourth installment of the series is now available. They have emerged from the world of track bikes and are always showing us new ways to play with them.

Custom built with Columbus 7005 series Airplane tubing, the AC-4 is sure to turn heads around town as you ride alongside the stunning graphic work of Portland artist Al Nelson.

Charcoal Silver

The Charcoal Silver is a subdued coloring with an edgy design that is eye-catching.Charcoal Silver features a variety of distinctive paints scattered throughout.The simplicity of the coloring makes each design stand out. Depending on the parts assembly, we have a feeling that the coolest body will be created.

AC-4

The biggest update is the extension of tire clearance up to 32c. Nothing will hold back your style anymore.

The 1 1/8"-1 1/2" tapered fork is made of completely original carbon monocoque from the molding process. It is rigid and extremely lightweight, and its unprecedented 30mm rake truncation angle will allow for sharp cornering.

Smoothly finished fork crowns and rear bridge hide guides for retrofitting brakes. Like the AC-3, it also has bottle mounts for quick hydration.

For those who love criteriums and want to ride like an arrow through the streets.
You want a frame that responds directly to your needs, no matter how far and how fast you ride.
Establish the best style for you.

[SPEC]

Size:S, M, L
Seatpost diameter:27.2mm
Front end width:100 x Φ 9 mm
Rear end width:120 x Φ 10 mm
Head standard:1 1/8"-1 1/2" tapered *CHRIS KING DropSet™ 2 can be used.
BB standard:JIS 68mm
Tire clearance:700 x 32c (recommended)
Brakes:Front and rear short arches
Frame Material:COLUMBUS 7005Series Airplane
Fork Material:Carbon
Accessories:Head parts, seat clamp, stem cap, pressure plug

[GEOMETRY]

Sizes.	XS/50	S/52	M/54
Seat tube length (C-T/mm)	500	520	540
Seat tube length(C-C/mm)	460	480	500
Top tube length(C-C/mm)	510	525	540
Head tube length(mm)	100	110	125
Seat tube angle(°)	76	75.5	75.5
Head tube angle(°)	72.5	73.5	74.5
Fork break(mm)	30	30	30
Chainstay length (mm)	389	389	389 389
BB drop (mm)	54	54	54 54
Fork length	368	368	368
Reference height (cm)	163-168	168-173	173-178

MASH

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MASH AC-4 Blacklight Purple Frame Set

MASH AC-4 Charcoal Silver Frame Set

MASH AC-4 Neon Algae Frame Set

MASH AC-4 Raw Smoke Frame Set