Specialized M4 Premium Aluminum, 148mm thru-axle, adjustable dropout, SS compatible, tapered head tube, internal cable routing

If you’re looking for a frame that’s snappy, confident, and happiest on trails that make other hardtails cry, you’ve come to the right place. The Fuse’s M4 aluminum frame is loaded with smart touches. The wide-diameter down tube boosts stiffness. The low-slung top tube gives you the clearance to throw the bike around on tight trails. Adjustable dropouts let you run the Fuse geared or single-speed. Those same dropouts also let you adjust the chainstays by as much as 15 millimeters, lengthening the rear end for more stability or shortening it up for quick, nimble manners. The Fuse is a piece of rolling art—the kind of functional art that has you dragging handlebars in corners, braking way too late, and making indecent growling noises mid-ride.

Specialized Fuse M4 Frameset

The Specialized Fuse is a versatile trail hardtail that defies traditional expectations with its fun, frisky ride and capability in rough, technical terrain. Its 130mm fork, slack geometry, and plus-sized tires enhance confidence and comfort on descents, while the steep seat angle aids in efficient climbing. However, some reviews note issues with front-end height and brake performance, and comparisons often highlight bikes like the Calibre Line 29 and Vitus Sentier 29.

MSRP	$800
Where to Buy	— $1 At
Category	Trail

Frame	Aluminum

Wheels
Wheel Size	29″




Drivetrain
Brand Site	specialized.com
Summary	The Specialized Fuse M4 Frameset is a 29″ aluminum frame trail frameset.